Tomodactylus macrotympanum Taylor, 1940e:496-99, pl. 55, figs. 2a-b. [Holotype.—FMNH 100049 (formerly EHT-HMS 6838), from La Placita, 8 km. S Jacala, Hidalgo, México, 1850 m.; collected on July 2, 1936, by Edward H. Taylor]. Smith and Taylor, 1948:47-48.
Syrrhophus macrotympanum: Dixon, 1957:384. Gorham, 1966:165.
Diagnosis.—Medium-sized frogs, males 17.5-26.1 mm. snout-vent, females 28.0-31.7 mm. snout-vent length; vocal slits in males; digital tips slightly expanded; first finger shorter than second; skin of dorsum pustular, that of venter areolate; snout elongate, subacuminate; diameter of tympanum 56.1-76.7 per cent that of eye in males, 54.3-56.8 in females; in preservative, dorsum reddish brown with numerous small black or dark brown spots ([Fig. 8]); venter white to cream; in life dorsum green with darker green spots, belly white; iris gold above, bronze below.
Remarks.—Cope's (1885) original description was not sufficiently clear to enable subsequent authors to recognize this species. Taylor (1940e) described it as a Tomodactylus, but Dixon (1957) pointed out that T. macrotympanum differed from the other species of the genus in having a poorly developed lumbo-inguinal (inguinal) gland, and placed the species in the genus Syrrhophus. Comparison of the holotypes of S. verrucipes and T. macrotympanum leaves no doubt in my mind that a single species is involved. This same species was reported by Smith and Taylor (1948) as S. verruculatus.
Syrrhophus verrucipes bears resemblance to members of both the leprus and marnockii groups. In snout shape it is closer to the leprus group, whereas in digital pad, the shape of the general body form, and contiguity of habitat it is most similar to the marnockii group (S. guttilatus).
Etymology.—Latin, meaning warty foot, probably in reference to the numerous plantar supernumerary tubercles.
Distribution.—Moderate elevations in southeastern San Luis Potosí, Queretaro, and northwestern Hidalgo, México ([Fig. 7]).
Specimens examined—(43) MÉXICO, Hidalgo: Jacala, UMMZ 106434; 9.6 km. NE Jacala, Puerto de la Zorra, 1820 m., KU 60240-41, TCWC 11090, 11147; 8 km. S Jacala, La Placita, 1850 m., FMNH 100049 (holotype of Tomodactylus macrotympanum), 100791-803, 105334-35, 114287, UIMNH 15989-92, 15995-96, UMMZ 117252, USNM 137202; Tianguistengo, FMNH 113705-09, UIMNH 13328-30; near Zacualtipán, ANSP 11325 (holotype of Syrrhophus verrucipes). Queretaro: 3.5 km. S San Juan del Río, EAL 1343. San Luis Potosí: 9.6 km. W Ahuacatlán, LSUMZ 4968-70.
Syrrhophus dennisi new species
Syrrhophus latodactylus: Martin, 1958:49 (in part).