干旱区生态环境知识资源中心(Arid): Geographic variation in morphology in the Mohave Rattlesnake (Crotalusscutulatus Kennicott 1861) (Serpentes: Viperidae): implications for species boundaries

Arid

DOI	10.11646/zootaxa.4683.1.7
	Geographic variation in morphology in the Mohave Rattlesnake (Crotalusscutulatus Kennicott 1861) (Serpentes: Viperidae): implications for species boundaries
	Watson, Jessica A.1; Spencer, Carol L.2; Schield, Drew R.3; Butler, Brett O.4; Smith, Lydia L.2; Flores-Villela, Oscar 4; Campbell, Jonathan A.3; Mackessy, Stephen P.5; Castoe, Todd A.3; Meik, Jesse M.1
通讯作者	Meik, Jesse M.
来源期刊	ZOOTAXA
ISSN	1175-5326
EISSN	1175-5334
出版年	2019
卷号	4683 期号:1 页码:129-143
英文摘要	The Mohave Rattlesnake (Crotalus scutulatus) is a highly venomous pitviper inhabiting the arid interior deserts, grasslands, and savannas of western North America. Currently two subspecies are recognized . the Northern Mohave Rattlesnake (C. s. scutulatus) ranging from southern California to the southern Central Mexican Plateau, and the Huamantla Rattlesnake (C. s. salvini) from the region of Tlaxcala, Veracruz, and Puebla in south-central Mexico. Although recent studies have demonstrated extensive geographic variation in venom composition and cryptic genetic diversity in this species, no modern studies have focused on geographic variation in morphology. Here we analyzed a series of qualitative, meristic, and morphometric traits from 347 specimens of C. scutulatus and show that this species is phenotypically cohesive without discrete subgroups, and that morphology follows a continuous cline in primarily color pattern and meristic traits across the major axis of its expansive distribution. Interpreted in the context of previously published molecular evidence, our morphological analyses suggest that multiple episodes of isolation and secondary contact among metapopulations during the Pleistocene were sufficient to produce distinctive genetic populations, which have since experienced gene flow to produce clinal variation in phenotypes without discrete or diagnosable distinctions among these original populations. For taxonomic purposes, we recommend that C. scutulatus be retained as a single species, although it is possible that C. s. salvini, which is morphologically the most distinctive population, could represent a peripheral isolate in the initial stages of speciation.
英文关键词	Biogeography external morphology linear morphometry species delimitation Pleistocene taxonomy
类型	Article
语种	英语
国家	USA ; Mexico
收录类别	SCI-E
WOS记录号	WOS:000489603900007
WOS关键词	GENE FLOW ; WARM DESERTS ; DIVERGENCE ; SPECIATION ; PERSPECTIVES ; EVOLUTION ; LINEAGES ; CROTALUS
WOS类目	Zoology
WOS研究方向	Zoology
来源机构	Universidad Nacional Autónoma de México ; University of California, Berkeley
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/219384
作者单位	1.Tarleton State Univ, Dept Biol Sci, 1333 W Washington St, Stephenville, TX 76402 USA; 2.Univ Calif Berkeley, Museum Vertebrate Zool, 3101 Valley Life Sci Bldg, Berkeley, CA 94720 USA; 3.Univ Texas Arlington, Dept Biol, 501 S Nedderman Dr, Arlington, TX 76019 USA; 4.Univ Nacl Autonoma Mexico, Fac Ciencias, Dept Evolutionary Biol, Museo Zool, Ciudad Univ, Mexico City 04510, DF, Mexico; 5.Univ Northern Colorado, Sch Biol Sci, 501 20th St, Greeley, CO 80639 USA
推荐引用方式 GB/T 7714	Watson, Jessica A.,Spencer, Carol L.,Schield, Drew R.,et al. Geographic variation in morphology in the Mohave Rattlesnake (Crotalusscutulatus Kennicott 1861) (Serpentes: Viperidae): implications for species boundaries[J]. Universidad Nacional Autónoma de México, University of California, Berkeley,2019,4683(1):129-143.
APA	Watson, Jessica A..,Spencer, Carol L..,Schield, Drew R..,Butler, Brett O..,Smith, Lydia L..,...&Meik, Jesse M..(2019).Geographic variation in morphology in the Mohave Rattlesnake (Crotalusscutulatus Kennicott 1861) (Serpentes: Viperidae): implications for species boundaries.ZOOTAXA,4683(1),129-143.
MLA	Watson, Jessica A.,et al."Geographic variation in morphology in the Mohave Rattlesnake (Crotalusscutulatus Kennicott 1861) (Serpentes: Viperidae): implications for species boundaries".ZOOTAXA 4683.1(2019):129-143.