Cellular, Molecular, and Genetic Mechanisms of Avian Beak Development and Evolution

Literature Cited

1. 1.

   Abrahamczyk S, Souto-Vilarós D, Renner SS. 2014.. Escape from extreme specialization: passionflowers, bats and the sword-billed hummingbird. . Proc. R. Soc. B 281::20140888
   [Crossref] [Google Scholar]
2. 2.

   Abzhanov A, Kuo WP, Hartmann C, Grant BR, Grant PR, Tabin CJ. 2006.. The calmodulin pathway and evolution of elongated beak morphology in Darwin's finches. . Nature 442::563–67
   [Crossref] [Google Scholar]
3. 3.

   Abzhanov A, Tabin CJ. 2004.. Shh and Fgf8 act synergistically to drive cartilage outgrowth during cranial development. . Dev. Biol. 273::134–48
   [Crossref] [Google Scholar]
4. 4.

   Baumel JJ. 1993.. Handbook of Avian Anatomy: Nomina Anatomica Avium. Cambridge, MA:: Nuttall Ornithol. Club
   [Google Scholar]
5. 5.

   Bhullar BA, Hanson M, Fabbri M, Pritchard A, Bever GS, Hoffman E. 2016.. How to make a bird skull: major transitions in the evolution of the avian cranium, paedomorphosis, and the beak as a surrogate hand. . Integr. Comp. Biol. 56::389–403
   [Crossref] [Google Scholar]
6. 6.

   Bhullar BA, Marugan-Lobon J, Racimo F, Bever GS, Rowe TB, et al. 2012.. Birds have paedomorphic dinosaur skulls. . Nature 487::223–26
   [Crossref] [Google Scholar]
7. 7.

   Bhullar BA, Morris ZS, Sefton EM, Tok A, Tokita M, et al. 2015.. A molecular mechanism for the origin of a key evolutionary innovation, the bird beak and palate, revealed by an integrative approach to major transitions in vertebrate history. . Evolution 69::1665–77
   [Crossref] [Google Scholar]
8. 8.

   Bock WJ. 1999.. Avian cranial kinesis revisited. . Acta Ornithol. 34::115–22
   [Google Scholar]
9. 9.

   Boer EF, Maclary ET, Shapiro MD. 2021.. Complex genetic architecture of three-dimensional craniofacial shape variation in domestic pigeons. . Evol. Dev. 23::477–95
   [Crossref] [Google Scholar]
10. 10.

    Bosse M, Spurgin LG, Laine VN, Cole EF, Firth JA, et al. 2017.. Recent natural selection causes adaptive evolution of an avian polygenic trait. . Science 358::365–68
    [Crossref] [Google Scholar]
11. 11.

    Bout RG, Zweers GA. 2001.. The role of cranial kinesis in birds. . Comp. Biochem. Physiol. A Mol. Integr. Physiol. 131::197–205
    [Crossref] [Google Scholar]
12. 12.

    Brandon AA, Almeida D, Powder KE. 2023.. Neural crest cells as a source of microevolutionary variation. . Semin. Cell Dev. Biol. 145::42–51
    [Crossref] [Google Scholar]
13. 13.

    Braun EL, Kimball RT. 2021.. Data types and the phylogeny of Neoaves. . Birds 2::1–22
    [Crossref] [Google Scholar]
14. 14.

    Bright JA, Marugan-Lobon J, Cobb SN, Rayfield EJ. 2016.. The shapes of bird beaks are highly controlled by nondietary factors. . PNAS 113::5352–57
    [Crossref] [Google Scholar]
15. 15.

    Brito JM, Teillet MA, Le Douarin NM. 2008.. Induction of mirror-image supernumerary jaws in chicken mandibular mesenchyme by Sonic Hedgehog-producing cells. . Development 135::2311–19
    [Crossref] [Google Scholar]
16. 16.

    Brugmann SA, Powder KE, Young NM, Goodnough LH, Hahn SM, et al. 2010.. Comparative gene expression analysis of avian embryonic facial structures reveals new candidates for human craniofacial disorders. . Hum. Mol. Genet. 19::920–30
    [Crossref] [Google Scholar]
17. 17.

    Brusatte SL, O'Connor JK, Jarvis ED. 2015.. The origin and diversification of birds. . Curr. Biol. 25::R888–98
    [Crossref] [Google Scholar]
18. 18.

    Campana MG, Corvelo A, Shelton J, Callicrate TE, Bunting KL, et al. 2020.. Adaptive radiation genomics of two ecologically divergent Hawai'ian honeycreepers: the 'akiapōlā'au and the Hawai'i 'amakihi. . J. Hered. 111::21–32
    [Google Scholar]
19. 19.

    Cela P, Buchtova M, Vesela I, Fu K, Bogardi JP, et al. 2016.. BMP signaling regulates the fate of chondro-osteoprogenitor cells in facial mesenchyme in a stage-specific manner. . Dev. Dyn. 245::947–62
    [Crossref] [Google Scholar]
20. 20.

    Chen Y, Zhang Y, Jiang TX, Barlow AJ, St. Amand TR, et al. 2000.. Conservation of early odontogenic signaling pathways in Aves. . PNAS 97::10044–49
    [Crossref] [Google Scholar]
21. 21.

    Cheng Y, Gao B, Wang H, Han N, Shao S, et al. 2017.. Evolution of beak morphology in the Ground Tit revealed by comparative transcriptomics. . Front. Zool. 14::58
    [Crossref] [Google Scholar]
22. 22.

    Cheng Y, Lei F. 2024.. Avian lower beak is always overlooked: its coordinate role in shaping species-specific beak should not be underestimated. . Integr. Zool. 19::339–42
    [Crossref] [Google Scholar]
23. 23.

    Cooney CR, Bright JA, Capp EJR, Chira AM, Hughes EC, et al. 2017.. Mega-evolutionary dynamics of the adaptive radiation of birds. . Nature 542::344–47
    [Crossref] [Google Scholar]
24. 24.

    Creuzet S, Couly G, Le Douarin NM. 2005.. Patterning the neural crest derivatives during development of the vertebrate head: insights from avian studies. . J. Anat. 207::447–59
    [Crossref] [Google Scholar]
25. 25.

    Dalen L, Heintzman PD, Kapp JD, Shapiro B. 2023.. Deep-time paleogenomics and the limits of DNA survival. . Science 382::48–53
    [Crossref] [Google Scholar]
26. 26.

    Darwin C. 1859.. The Origin of Species. New York:: Crowell-Collier Publ. Co.
    [Google Scholar]
27. 27.

    Darwin C. 1868.. The Variation of Animals and Plants Under Domestication. London:: J. Murray
    [Google Scholar]
28. 28.

    Davit-Beal T, Tucker AS, Sire JY. 2009.. Loss of teeth and enamel in tetrapods: fossil record, genetic data and morphological adaptations. . J. Anat. 214::477–501
    [Crossref] [Google Scholar]
29. 29.

    de Souza GA, Soares MB, Weinschutz LC, Wilner E, Lopes RT, et al. 2021.. The first edentulous ceratosaur from South America. . Sci. Rep. 11::22281
    [Crossref] [Google Scholar]
30. 30.

    Depew MJ, Lufkin T, Rubenstein JL. 2002.. Specification of jaw subdivisions by Dlx genes. . Science 298::381–85
    [Crossref] [Google Scholar]
31. 31.

    Ealba EL, Jheon AH, Hall J, Curantz C, Butcher KD, Schneider RA. 2015.. Neural crest-mediated bone resorption is a determinant of species-specific jaw length. . Dev. Biol. 408::151–63
    [Crossref] [Google Scholar]
32. 32.

    Ealba EL, Schneider RA. 2013.. A simple PCR-based strategy for estimating species-specific contributions in chimeras and xenografts. . Development 140::3062–68
    [Crossref] [Google Scholar]
33. 33.

    Eames BF, Schneider RA. 2008.. The genesis of cartilage size and shape during development and evolution. . Development 135::3947–58
    [Crossref] [Google Scholar]
34. 34.

    Eames BF, Sharpe PT, Helms JA. 2004.. Hierarchy revealed in the specification of three skeletal fates by Sox9 and Runx2. . Dev. Biol. 274::188–200
    [Crossref] [Google Scholar]
35. 35.

    Elkin J, Martin A, Courtier-Orgogozo V, Santos ME. 2023.. Analysis of the genetic loci of pigment pattern evolution in vertebrates. . Biol. Rev. Camb. Philos. Soc. 98::1250–77
    [Crossref] [Google Scholar]
36. 36.

    Enbody ED, Sprehn CG, Abzhanov A, Bi H, Dobreva MP, et al. 2021.. A multispecies BCO2 beak color polymorphism in the Darwin's finch radiation. . Curr. Biol. 31::5597–604.e7
    [Crossref] [Google Scholar]
37. 37.

    Erdogan S, Iwasaki S. 2014.. Function-related morphological characteristics and specialized structures of the avian tongue. . Ann. Anat. 196::75–87
    [Crossref] [Google Scholar]
38. 38.

    Erickson GM, Zelenitsky DK, Kay DI, Norell MA. 2017.. Dinosaur incubation periods directly determined from growth-line counts in embryonic teeth show reptilian-grade development. . PNAS 114::540–45
    [Crossref] [Google Scholar]
39. 39.

    Feduccia A. 1999.. The Origin and Evolution of Birds. New Haven, CT:: Yale Univ. Press
    [Google Scholar]
40. 40.

    Felice RN, Goswami A. 2018.. Developmental origins of mosaic evolution in the avian cranium. . PNAS 115::555–60
    [Crossref] [Google Scholar]
41. 41.

    Felice RN, Tobias JA, Pigot AL, Goswami A. 2019.. Dietary niche and the evolution of cranial morphology in birds. . Proc. R. Soc. B 286::20182677
    [Crossref] [Google Scholar]
42. 42.

    Felice RN, Watanabe A, Cuff AR, Hanson M, Bhullar BS, et al. 2020.. Decelerated dinosaur skull evolution with the origin of birds. . PLOS Biol. 18::e3000801
    [Crossref] [Google Scholar]
43. 43.

    Feng S, Stiller J, Deng Y, Armstrong J, Fang Q, et al. 2020.. Dense sampling of bird diversity increases power of comparative genomics. . Nature 587::252–57
    [Crossref] [Google Scholar]
44. 44.

    Ferguson CA, Tucker AS, Sharpe PT. 2000.. Temporospatial cell interactions regulating mandibular and maxillary arch patterning. . Development 127::403–12
    [Crossref] [Google Scholar]
45. 45.

    Fish JL. 2019.. Evolvability of the vertebrate craniofacial skeleton. . Semin. Cell Dev. Biol. 91::13–22
    [Crossref] [Google Scholar]
46. 46.

    Fish JL, Schneider RA. 2014.. Assessing species-specific contributions to craniofacial development using quail-duck chimeras. . J. Vis. Exp. 87::51534
    [Google Scholar]
47. 47.

    Fish JL, Schneider RA. 2014.. Neural crest-mediated tissue interactions during craniofacial development: the origins of species-specific pattern. . In Neural Crest Cells, ed. PA Trainor , pp. 101–24. Boston:: Academic
    [Google Scholar]
48. 48.

    Fish JL, Sklar RS, Woronowicz KC, Schneider RA. 2014.. Multiple developmental mechanisms regulate species-specific jaw size. . Development 141::674–84
    [Crossref] [Google Scholar]
49. 49.

    Francis-West P, Ladher R, Barlow A, Graveson A. 1998.. Signalling interactions during facial development. . Mech. Dev. 75::3–28
    [Crossref] [Google Scholar]
50. 50.

    Fritz JA, Brancale J, Tokita M, Burns KJ, Hawkins MB, et al. 2014.. Shared developmental programme strongly constrains beak shape diversity in songbirds. . Nat. Commun. 5::3700
    [Crossref] [Google Scholar]
51. 51.

    Gendron-Maguire M, Mallo M, Zhang M, Gridley T. 1993.. Hoxa-2 mutant mice exhibit homeotic transformation of skeletal elements derived from cranial neural crest. . Cell 75::1317–31
    [Crossref] [Google Scholar]
52. 52.

    Graham A. 2003.. Development of the pharyngeal arches. . Am. J. Med. Genet. A 119::251–56
    [Crossref] [Google Scholar]
53. 53.

    Grammatopoulos GA, Bell E, Toole L, Lumsden A, Tucker AS. 2000.. Homeotic transformation of branchial arch identity after Hoxa2 overexpression. . Development 127::5355–65
    [Crossref] [Google Scholar]
54. 54.

    Grant PR, Grant BR, Abzhanov A. 2006.. A developing paradigm for the development of bird beaks. . Biol. J. Linn. Soc. 88::17–22
    [Crossref] [Google Scholar]
55. 55.

    Guillerme T, Bright JA, Cooney CR, Hughes EC, Varley ZK, et al. 2023.. Innovation and elaboration on the avian tree of life. . Sci. Adv. 9::eadg1641
    [Crossref] [Google Scholar]
56. 56.

    Gussekloo SW, Bout RG. 2005.. Cranial kinesis in palaeognathous birds. . J. Exp. Biol. 208::3409–19
    [Crossref] [Google Scholar]
57. 57.

    Hall BK. 2015.. Bones and Cartilage: Developmental and Evolutionary Skeletal Biology. Amsterdam:: Elsevier
    [Google Scholar]
58. 58.

    Hall J, Jheon AH, Ealba EL, Eames BF, Butcher KD, et al. 2014.. Evolution of a developmental mechanism: species-specific regulation of the cell cycle and the timing of events during craniofacial osteogenesis. . Dev. Biol. 385::380–95
    [Crossref] [Google Scholar]
59. 59.

    Harris MP, Hasso SM, Ferguson MW, Fallon JF. 2006.. The development of archosaurian first-generation teeth in a chicken mutant. . Curr. Biol. 16::371–77
    [Crossref] [Google Scholar]
60. 60.

    Havens BA, Velonis D, Kronenberg MS, Lichtler AC, Oliver B, Mina M. 2008.. Roles of FGFR3 during morphogenesis of Meckel's cartilage and mandibular bones. . Dev. Biol. 316::336–49
    [Crossref] [Google Scholar]
61. 61.

    Haworth KE, Wilson JM, Grevellec A, Cobourne MT, Healy C, et al. 2007.. Sonic hedgehog in the pharyngeal endoderm controls arch pattern via regulation of Fgf8 in head ectoderm. . Dev. Biol. 303::244–58
    [Crossref] [Google Scholar]
62. 62.

    Helms JA, Schneider RA. 2003.. Cranial skeletal biology. . Nature 423::326–31
    [Crossref] [Google Scholar]
63. 63.

    Hieronymus TL, Witmer LM. 2010.. Homology and evolution of avian compound Rhamphothecae. . Auk 127::590–604
    [Crossref] [Google Scholar]
64. 64.

    Houchen CJ, Castro B, Hahn Leat P, Mohammad N, Hall-Glenn F, Bumann EE. 2023.. Treatment with an inhibitor of matrix metalloproteinase 9 or cathepsin K lengthens embryonic lower jaw bone. . Orthod. Craniofac. Res. 26::500–9
    [Crossref] [Google Scholar]
65. 65.

    Jarvis ED, Mirarab S, Aberer AJ, Li B, Houde P, et al. 2014.. Whole-genome analyses resolve early branches in the tree of life of modern birds. . Science 346::1320–31
    [Crossref] [Google Scholar]
66. 66.

    Jetz W, Thomas GH, Joy JB, Hartmann K, Mooers AO. 2012.. The global diversity of birds in space and time. . Nature 491::444–48
    [Crossref] [Google Scholar]
67. 67.

    Jheon AH, Schneider RA. 2009.. The cells that fill the bill: neural crest and the evolution of craniofacial development. . J. Dent. Res. 88::12–21
    [Crossref] [Google Scholar]
68. 68.

    Jung J-Y, Naleway SE, Yaraghi NA, Herrera S, Sherman VR, et al. 2016.. Structural analysis of the tongue and hyoid apparatus in a woodpecker. . Acta Biomater 37::1–13
    [Crossref] [Google Scholar]
69. 69.

    Kanai SM, Clouthier DE. 2023.. Endothelin signaling in development. . Development 150::dev201786
    [Crossref] [Google Scholar]
70. 70.

    Kardon G, Harfe BD, Tabin CJ. 2003.. A Tcf4-positive mesodermal population provides a prepattern for vertebrate limb muscle patterning. . Dev. Cell 5::937–44
    [Crossref] [Google Scholar]
71. 71.

    King AS, McLelland J. 1979.. Form and Function in Birds. London:: Academic
    [Google Scholar]
72. 72.

    Krishnan A. 2023.. Biomechanics illuminates form–function relationships in bird bills. . J. Exp. Biol. 226:(Suppl. 1):jeb245171
    [Crossref] [Google Scholar]
73. 73.

    Kulkarni P, Mohanty A, Salgia R, Uversky VN. 2022.. Intrinsically disordered BMP4 morphogen and the beak of the finch: co-option of an ancient axial patterning system. . Int. J. Biol. Macromol. 219::366–73
    [Crossref] [Google Scholar]
74. 74.

    Lainoff AJ, Moustakas-Verho JE, Hu D, Kallonen A, Marcucio RS, Hlusko LJ. 2015.. A comparative examination of odontogenic gene expression in both toothed and toothless amniotes. . J. Exp. Zool. B Mol. Dev. Evol. 324::255–69
    [Crossref] [Google Scholar]
75. 75.

    Lamichhaney S, Berglund J, Almen MS, Maqbool K, Grabherr M, et al. 2015.. Evolution of Darwin's finches and their beaks revealed by genome sequencing. . Nature 518::371–75
    [Crossref] [Google Scholar]
76. 76.

    Lautenschlager S, Witmer LM, Altangerel P, Rayfield EJ. 2013.. Edentulism, beaks, and biomechanical innovations in the evolution of theropod dinosaurs. . PNAS 110::20657–62
    [Crossref] [Google Scholar]
77. 77.

    Le Douarin NM, Creuzet S, Couly G, Dupin E. 2004.. Neural crest cell plasticity and its limits. . Development 131::4637–50
    [Crossref] [Google Scholar]
78. 78.

    Lee SH, Fu KK, Hui JN, Richman JM. 2001.. Noggin and retinoic acid transform the identity of avian facial prominences. . Nature 414::909–12
    [Crossref] [Google Scholar]
79. 79.

    Li S, Bai S, Qin X, Zhang J, Irwin DM, et al. 2019.. Comparison of whole embryonic development in the duck (Anas platyrhynchos) and goose (Anser cygnoides) with the chicken (Gallus gallus). . Poult. Sci. 98::3278–91
    [Crossref] [Google Scholar]
80. 80.

    Livezey BC, Zusi RL. 2007.. Higher-order phylogeny of modern birds (Theropoda, Aves: Neornithes) based on comparative anatomy. II. Analysis and discussion. . Zool. J. Linn. Soc. 149::1–95
    [Crossref] [Google Scholar]
81. 81.

    Louchart A, Buffrenil V, Bourdon E, Dumont M, Viriot L, Sire JY. 2018.. Bony pseudoteeth of extinct pelagic birds (Aves, Odontopterygiformes) formed through a response of bone cells to tooth-specific epithelial signals under unique conditions. . Sci. Rep. 8::12952
    [Crossref] [Google Scholar]
82. 82.

    Louchart A, Viriot L. 2011.. From snout to beak: the loss of teeth in birds. . Trends Ecol. Evol. 26::663–73
    [Crossref] [Google Scholar]
83. 83.

    Louryan S, Choa-Duterre M, Lejong M, Vanmuylder N. 2022.. Evolution and development of parrot pseudoteeth. . J. Morphol. 283::207–18
    [Crossref] [Google Scholar]
84. 84.

    Lucas AM, Stettenheim PR. 1972.. Avian Anatomy: Integument. Washington, DC:: US Dep. of Agric.
    [Google Scholar]
85. 85.

    Lwigale PY, Schneider RA. 2008.. Other chimeras: quail–duck and mouse–chick. . Methods Cell Biol. 87::59–74
    [Crossref] [Google Scholar]
86. 86.

    Mallarino R, Grant PR, Grant BR, Herrel A, Kuo WP, Abzhanov A. 2011.. Two developmental modules establish 3D beak-shape variation in Darwin's finches. . PNAS 108::4057–62
    [Crossref] [Google Scholar]
87. 87.

    Marcucio R, Hallgrimsson B, Young NM. 2015.. Facial morphogenesis: physical and molecular interactions between the brain and the face. . Curr. Top. Dev. Biol. 115::299–320
    [Crossref] [Google Scholar]
88. 88.

    Marcucio RS, Young NM, Hu D, Hallgrimsson B. 2011.. Mechanisms that underlie co-variation of the brain and face. . Genesis 49::177–89
    [Crossref] [Google Scholar]
89. 89.

    Marugan-Lobon J, Nebreda SM, Navalon G, Benson RBJ. 2022.. Beyond the beak: brain size and allometry in avian craniofacial evolution. . J. Anat. 240::197–209
    [Crossref] [Google Scholar]
90. 90.

    McNew SM, Beck D, Sadler-Riggleman I, Knutie SA, Koop JAH, et al. 2017.. Epigenetic variation between urban and rural populations of Darwin's finches. . BMC Evol. Biol. 17::183
    [Crossref] [Google Scholar]
91. 91.

    Merrill AE, Eames BF, Weston SJ, Heath T, Schneider RA. 2008.. Mesenchyme-dependent BMP signaling directs the timing of mandibular osteogenesis. . Development 135::1223–34
    [Crossref] [Google Scholar]
92. 92.

    Mitsiadis TA, Cheraud Y, Sharpe P, Fontaine-Perus J. 2003.. Development of teeth in chick embryos after mouse neural crest transplantations. . PNAS 100::6541–45
    [Crossref] [Google Scholar]
93. 93.

    Mosleh S, Choi GPT, Musser GM, James HF, Abzhanov A, Mahadevan L. 2023.. Beak morphometry and morphogenesis across avian radiations. . Proc. R. Soc. B 290::20230420
    [Crossref] [Google Scholar]
94. 94.

    Navalon G, Bright JA, Marugan-Lobon J, Rayfield EJ. 2019.. The evolutionary relationship among beak shape, mechanical advantage, and feeding ecology in modern birds. . Evolution 73::422–35
    [Crossref] [Google Scholar]
95. 95.

    Newton AH, Pask AJ. 2020.. Evolution and expansion of the RUNX2 QA repeat corresponds with the emergence of vertebrate complexity. . Commun. Biol. 3::771
    [Crossref] [Google Scholar]
96. 96.

    Nguyen TT, Mitchell JM, Kiel MD, Kenny CP, Li H, et al. 2023.. TFAP2 paralogs regulate midfacial development in part through a conserved ALX genetic pathway. . Development 151::dev202095
    [Crossref] [Google Scholar]
97. 97.

    Nimmagadda S, Buchtova M, Fu K, Geetha-Loganathan P, Hosseini-Farahabadi S, et al. 2015.. Identification and functional analysis of novel facial patterning genes in the duplicated beak chicken embryo. . Dev. Biol. 407::275–88
    [Crossref] [Google Scholar]
98. 98.

    Noden DM, Schneider RA. 2006.. Neural crest cells and the community of plan for craniofacial development: historical debates and current perspectives. . Adv. Exp. Med. Biol. 589::1–23
    [Crossref] [Google Scholar]
99. 99.

    Orkney A, Bjarnason A, Tronrud BC, Benson RBJ. 2021.. Patterns of skeletal integration in birds reveal that adaptation of element shapes enables coordinated evolution between anatomical modules. . Nat. Ecol. Evol. 5::1250–58
    [Crossref] [Google Scholar]
100. 100.

     Ostrom JH. 1976.. Archaeopteryx and the origin of birds. . Biol. J. Linn. Soc. 8::91–118
     [Crossref] [Google Scholar]
101. 101.

     Parsons KJ, Albertson RC. 2009.. Roles for Bmp4 and CaM1 in shaping the jaw: evo-devo and beyond. . Annu. Rev. Genet. 43::369–88
     [Crossref] [Google Scholar]
102. 102.

     Pereira SL, Baker AJ. 2006.. A molecular timescale for galliform birds accounting for uncertainty in time estimates and heterogeneity of rates of DNA substitutions across lineages and sites. . Mol. Phylogenet. Evol. 38::499–509
     [Crossref] [Google Scholar]
103. 103.

     Podos J. 2001.. Correlated evolution of morphology and vocal signal structure in Darwin's finches. . Nature 409::185–88
     [Crossref] [Google Scholar]
104. 104.

     Podos J, Southall JA, Rossi-Santos MR. 2004.. Vocal mechanics in Darwin's finches: correlation of beak gape and song frequency. . J. Exp. Biol. 207::607–19
     [Crossref] [Google Scholar]
105. 105.

     Powder KE, Ku YC, Brugmann SA, Veile RA, Renaud NA, et al. 2012.. A cross-species analysis of microRNAs in the developing avian face. . PLOS ONE 7::e35111
     [Crossref] [Google Scholar]
106. 106.

     Prum RO, Berv JS, Dornburg A, Field DJ, Townsend JP, et al. 2015.. A comprehensive phylogeny of birds (Aves) using targeted next-generation DNA sequencing. . Nature 526::569–73
     [Crossref] [Google Scholar]
107. 107.

     Richman JM, Lee SH. 2003.. About face: signals and genes controlling jaw patterning and identity in vertebrates. . Bioessays 25::554–68
     [Crossref] [Google Scholar]
108. 108.

     Richman JM, Tickle C. 1989.. Epithelia are interchangeable between facial primordia of chick embryos and morphogenesis is controlled by the mesenchyme. . Dev. Biol. 136::201–10
     [Crossref] [Google Scholar]
109. 109.

     Rico-Guevara A, Hurme KJ, Rubega MA, Cuban D. 2023.. Nectar feeding beyond the tongue: hummingbirds drink using phase-shifted bill opening, flexible tongue flaps and wringing at the tips. . J. Exp. Biol. 226:(Suppl. 1):jeb245074
     [Crossref] [Google Scholar]
110. 110.

     Rijli FM, Mark M, Lakkaraju S, Dierich A, Dolle P, Chambon P. 1993.. A homeotic transformation is generated in the rostral branchial region of the head by disruption of Hoxa-2, which acts as a selector gene. . Cell 75::1333–49
     [Crossref] [Google Scholar]
111. 111.

     Rubin CJ, Enbody ED, Dobreva MP, Abzhanov A, Davis BW, et al. 2022.. Rapid adaptive radiation of Darwin's finches depends on ancestral genetic modules. . Sci. Adv. 8::eabm5982
     [Crossref] [Google Scholar]
112. 112.

     Sanchez-Villagra MR, Geiger M, Schneider RA. 2016.. The taming of the neural crest: a developmental perspective on the origins of morphological covariation in domesticated mammals. . R. Soc. Open Sci. 3::160107
     [Crossref] [Google Scholar]
113. 113.

     Sandell LL, Trainor PA. 2006.. Neural crest cell plasticity: Size matters. . Adv. Exp. Med. Biol. 589::78–95
     [Crossref] [Google Scholar]
114. 114.

     Saranathan V, Finet C. 2021.. Cellular and developmental basis of avian structural coloration. . Curr. Opin Genet. Dev. 69::56–64
     [Crossref] [Google Scholar]
115. 115.

     Schneider RA. 1999.. Neural crest can form cartilages normally derived from mesoderm during development of the avian head skeleton. . Dev. Biol. 208::441–55
     [Crossref] [Google Scholar]
116. 116.

     Schneider RA. 2005.. Developmental mechanisms facilitating the evolution of bills and quills. . J. Anat. 207::563–73
     [Crossref] [Google Scholar]
117. 117.

     Schneider RA. 2007.. How to tweak a beak: molecular techniques for studying the evolution of size and shape in Darwin's finches and other birds. . Bioessays 29::1–6
     [Crossref] [Google Scholar]
118. 118.

     Schneider RA. 2015.. Regulation of jaw length during development, disease, and evolution. . Curr. Top. Dev. Biol. 115::271–98
     [Crossref] [Google Scholar]
119. 119.

     Schneider RA. 2018.. Cellular control of time, size, and shape in development and evolution. . In Cells in Evolutionary Biology: Translating Genotypes into Phenotypes – Past, Present, Future, ed. BK Hall, SA Moody , pp. 167–212. Boca Raton, FL:: CRC Press
     [Google Scholar]
120. 120.

     Schneider RA. 2018.. Neural crest and the origin of species-specific pattern. . Genesis 56::e23219
     [Crossref] [Google Scholar]
121. 121.

     Schneider RA, Helms JA. 2003.. The cellular and molecular origins of beak morphology. . Science 299::565–68
     [Crossref] [Google Scholar]
122. 122.

     Schneider RA, Hu D, Rubenstein JL, Maden M, Helms JA. 2001.. Local retinoid signaling coordinates forebrain and facial morphogenesis by maintaining FGF8 and SHH. . Development 128::2755–67
     [Crossref] [Google Scholar]
123. 123.

     Selleri L, Rijli FM. 2023.. Shaping faces: genetic and epigenetic control of craniofacial morphogenesis. . Nat. Rev. Genet. 24::610–26
     [Crossref] [Google Scholar]
124. 124.

     Sheard C, Street SE, Evans C, Lala KN, Healy SD, Sugasawa S. 2023.. Beak shape and nest material use in birds. . Philos. Trans. R. Soc. B 378::20220147
     [Crossref] [Google Scholar]
125. 125.

     Shigetani Y, Nobusada Y, Kuratani S. 2000.. Ectodermally derived FGF8 defines the maxillomandibular region in the early chick embryo: epithelial-mesenchymal interactions in the specification of the craniofacial ectomesenchyme. . Dev. Biol. 228::73–85
     [Crossref] [Google Scholar]
126. 126.

     Sinervo B. 2005.. Darwin's finch beaks, Bmp4, and the developmental origins of novelty. . Heredity 94::141–42
     [Crossref] [Google Scholar]
127. 127.

     Smith FJ, Percival CJ, Young NM, Hu D, Schneider RA, et al. 2015.. Divergence of craniofacial developmental trajectories among avian embryos. . Dev. Dyn. 244::1158–67
     [Crossref] [Google Scholar]
128. 128.

     Smith KK. 1993.. The form of the feeding apparatus in terrestrial vertebrates: studies of adaptation and constraint. . In The Skull, ed. J Hanken, BK Hall , pp. 150–96. Chicago:: Univ. Chicago Press
     [Google Scholar]
129. 129.

     Smith KK, Schneider RA. 1998.. Have gene knockouts caused evolutionary reversals in the mammalian first arch?. BioEssays 20::245–55
     [Crossref] [Google Scholar]
130. 130.

     Smith SS, Chu D, Qu T, Aggleton JA, Schneider RA. 2022.. Species-specific sensitivity to TGFβ signaling and changes to the Mmp13 promoter underlie avian jaw development and evolution. . eLife 11::e66005
     [Crossref] [Google Scholar]
131. 131.

     Solem RC, Eames BF, Tokita M, Schneider RA. 2011.. Mesenchymal and mechanical mechanisms of secondary cartilage induction. . Dev. Biol. 356::28–39
     [Crossref] [Google Scholar]
132. 132.

     Starck JM, Ricklefs RE. 1998.. Avian Growth and Development: Evolution Within the Altricial-Precocial Spectrum. New York:: Oxford Univ. Press
     [Google Scholar]
133. 133.

     Stiller J, Feng S, Chowdhury A-A, Rivas-González I, Duchêne DA, et al. 2024.. Complexity of avian evolution revealed by family-level genomes. . Nature 629::851–60
     [Crossref] [Google Scholar]
134. 134.

     Szabo-Rogers HL, Geetha-Loganathan P, Nimmagadda S, Fu KK, Richman JM. 2008.. FGF signals from the nasal pit are necessary for normal facial morphogenesis. . Dev. Biol. 318::289–302
     [Crossref] [Google Scholar]
135. 135.

     Tokita M. 2003.. The skull development of parrots with special reference to the emergence of a morphologically unique cranio-facial hinge. . Zool. Sci. 20::749–58
     [Crossref] [Google Scholar]
136. 136.

     Tokita M, Nakayama T, Schneider RA, Agata K. 2013.. Molecular and cellular changes associated with the evolution of novel jaw muscles in parrots. . Proc. R. Soc. B 280::20122319
     [Crossref] [Google Scholar]
137. 137.

     Tokita M, Schneider RA. 2009.. Developmental origins of species-specific muscle pattern. . Dev. Biol. 331::311–25
     [Crossref] [Google Scholar]
138. 138.

     Trainor PA, Ariza-McNaughton L, Krumlauf R. 2002.. Role of the isthmus and FGFs in resolving the paradox of neural crest plasticity and prepatterning. . Science 295::1288–91
     [Crossref] [Google Scholar]
139. 139.

     Tucker AS, Lumsden A. 2004.. Neural crest cells provide species-specific patterning information in the developing branchial skeleton. . Evol. Dev. 6::32–40
     [Crossref] [Google Scholar]
140. 140.

     Van Otterloo E, Milanda I, Pike H, Thompson JA, Li H, et al. 2022.. AP-2α and AP-2β cooperatively function in the craniofacial surface ectoderm to regulate chromatin and gene expression dynamics during facial development. . eLife 11::e70511
     [Crossref] [Google Scholar]
141. 141.

     Wang S, Stiegler J, Wu P, Chuong CM, Hu D, et al. 2017.. Heterochronic truncation of odontogenesis in theropod dinosaurs provides insight into the macroevolution of avian beaks. . PNAS 114::10930–35
     [Crossref] [Google Scholar]
142. 142.

     Wilson J, Tucker AS. 2004.. Fgf and Bmp signals repress the expression of Bapx1 in the mandibular mesenchyme and control the position of the developing jaw joint. . Dev. Biol. 266::138–50
     [Crossref] [Google Scholar]
143. 143.

     Woronowicz KC, Gline SE, Herfat ST, Fields AJ, Schneider RA. 2018.. FGF and TGFβ signaling link form and function during jaw development and evolution. . Dev. Biol. 444:(Suppl. 1):S219–36
     [Crossref] [Google Scholar]
144. 144.

     Woronowicz KC, Schneider RA. 2019.. Molecular and cellular mechanisms underlying the evolution of form and function in the amniote jaw. . EvoDevo 10::17
     [Crossref] [Google Scholar]
145. 145.

     Wu L, Jiao X, Zhang D, Cheng Y, Song G, et al. 2021.. Comparative genomics and evolution of avian specialized traits. . Curr. Genom. 22::496–511
     [Crossref] [Google Scholar]
146. 146.

     Wu P, Jiang TX, Shen JY, Widelitz RB, Chuong CM. 2006.. Morphoregulation of avian beaks: comparative mapping of growth zone activities and morphological evolution. . Dev. Dyn. 235::1400–12
     [Crossref] [Google Scholar]
147. 147.

     Wu P, Jiang TX, Suksaweang S, Widelitz RB, Chuong CM. 2004.. Molecular shaping of the beak. . Science 305::1465–66
     [Crossref] [Google Scholar]
148. 148.

     Yang TR, Sander PM. 2018.. The origin of the bird's beak: new insights from dinosaur incubation periods. . Biol. Lett. 14::20180090
     [Crossref] [Google Scholar]
149. 149.

     Young MW, Wilken AT, Manafzadeh AR, Schurr AF, Bastian A, et al. 2023.. The dual function of prokinesis in the feeding and locomotor systems of parrots. . J. Exp. Biol. 226::jeb246659
     [Crossref] [Google Scholar]
150. 150.

     Young NM, Hu D, Lainoff AJ, Smith FJ, Diaz R, et al. 2014.. Embryonic bauplans and the developmental origins of facial diversity and constraint. . Development 141::1059–63
     [Crossref] [Google Scholar]
151. 151.

     Young NM, Linde-Medina M, Fondon JW, Hallgrimsson B, Marcucio RS. 2017.. Craniofacial diversification in the domestic pigeon and the evolution of the avian skull. . Nat. Ecol. Evol. 1::95
     [Crossref] [Google Scholar]
152. 152.

     Yusuf L, Heatley MC, Palmer JPG, Barton HJ, Cooney CR, Gossmann TI. 2020.. Noncoding regions underpin avian bill shape diversification at macroevolutionary scales. . Genome Res. 30::553–65
     [Crossref] [Google Scholar]
153. 153.

     Zhang G, Li C, Li Q, Li B, Larkin DM, et al. 2014.. Comparative genomics reveals insights into avian genome evolution and adaptation. . Science 346::1311–20
     [Crossref] [Google Scholar]
154. 154.

     Zusi RL. 1993.. Patterns of diversity in the avian skull. . In The Skull, ed. J Hanken, BK Hall , pp. 391–437. Chicago:: Univ. Chicago Press
     [Google Scholar]