302 



REPTILIA: SERPENTES: COLUBRIDAE * * * * THAMNOPHIS 



Prepared by Douglas A. Rossman, Museum of Zoology, Louisiana State University, Baton Rouge, Louisiana 



THAMNOPHIS Fitzinger 



1843 Thamnoph i s Fitzinger, Systema Reptllium; 26. Type-species: Coluber saur i ta Linnaeus. 

 1853 Euta i n ia Baird and Girard, Cat. North Amer. Reptiles: 24. Type-species: None designated; first 

 of 15 forms listed is Coluber saur i ta Linnaeus. 



1859 Eutaen ia Kennicott (substitute name for Euta i n ia Baird and Girard, preoccupied by Eutaen ia 



Thompson, 1857), Proc. Acad. Nat. Sc i . Phila., 185?: 58. 

 1861 Prymnom i odon Cope, Proc. Acad. Nat. Sci. Phila., 1860: 558- Type-species: Prymnomi odon chalceus 



Cope. 

 IB75 Ch i lopoma Cope, in Yarrow, Wheeler's Rept. Explor. Surv. W. 100th Mer., 5" 5^3- Type-species: 



Ch i lopoma ruf opunctatum Cope. 

 I883 Atomarchus Cope, Amer. Nat.: I3OO. Type-species: Atomarchus mult i maculatus Cope. 

 I885 Stypocemus Cope (substitute name for Ch i lopoma Cope, preoccupied by Che ilopoma Murray, I867), 



Proc. Amer. Phil. Soc, 22: 387. 



Distribution: Central Canada throughout North America to central Costa Rica. 

 Content: Twenty-two species, I5 of which are ex tral im i tal. 



Key to the species Clave de especies 



1. Vertical black markings border some supralabial 1. Marcas negras verticales bordean a algunas 



sutures 2 suturas lab i ales 2 



Supralabials without black markings prox i mus Supralab iales sin marcas negras prox imus 



2. Belly with two rows of black spots, often 2. Vientre con dos hileras de manchas negras, a 



interconnected; lateral stripe, when present, menudo i nterconectadas; cinta lateral, cuando 

 confined to row three on anterior part of presente, confinada a la hilera tercera en 



body marc i anus parte anterior del cuerpo marc ianus 



Belly unspotted; lateral stripe on rows two and Vientre sin manchas; cinta lateral en hileras 



three anteriorly cyrtops is segunda y tercera anter iormente cyrtops i s 



THAMNOPHIS CYRTOPSIS (Kennicottj 



1860 E.[ utaenia ] cyrtopsis Kennicott. Proc. Acad. Nat. Sci. Phila., 1860: 333. Type-locality: 



Rinconada, Coahuila, Mexico. 



1861 Thamnophis cyrtops i s — Cope. Proc. Acad. Nat. Sci. Phila., 1861: 299. 

 1953 Thamnophis Cyrtopsis — Milstead, Texas Jour. Sci., 5' 3^^- 



Distribution: Southwestern United States throughout Mexico, exclusive of eastern lowlands, to 

 western Honduras. 



Content: Six subspecies, five of which are ex tral im i tal. 



Thamnoph is cyrtops i s f ulvus (Bocourt) 



I893 Eutaen ia cyrtops i s var. f ulvus Bocourt, Miss. Sci. Mex., Rept.: 777' Type-locality: Alta 



Verapaz, Guatemala. 

 1942 Thamnoph i s sum ichrast i cerebrosus Smith, Zoologica, 27= 111. Type-locality: Escuintla, 



Guatemala. 

 1950 Thamnoph i s sumichrast i salv in i Smith, Nixon and Smith, Linn. Soc. Jour. Zool., 41: 579» 



Type-locality: R'o Chixoy, below town of Cubules ( 7Cub i Igu i tz) , Guatemala. 

 1965 T.[ hamnoph i s j c.[ yrtops i s j f ulvus — Rossman, Copeia, I965! 243. 



Distribution: Upland areas, Chiapas, Mexico to western Honduras. 



THAMNOPHIS MARC IANUS (Baird and Girard) 



I853 Euta i n ia Marc iana Baird and Girard, Cat. North Amer. Reptiles: JG, Type-locality: Red River, 



Arkansas; restricted to vicinity of Slough Creek, east of Hollister, Tillman County, Oklahoma, 

 by Mittleman, Bull. Chicago Acad. Sci., 8, I949, 243, 



1907 Thamnophis marciana — Ruthven, Bull. Amer. Mus. Nat, Hist,, 23: 589» 



19^9 Thamnoph i s marc ianus — Mittleman, Bull. Chicago Acad. Sci,, 8: 235» 



Distribution: Southwestern United States and northern Mexico; Isthmus of Tehuantepec, Mexico, to 

 northern Costa Rica. 



Content; Three subspecies, one of which is ex tral im i tal, according to revision currently in press 

 by author. 



