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Higher TaxaTestudinidae, Testudinoidea, Testudines (turtles)
Common NamesE: Goode’s Thornscrub Tortoise 
Xerobates agassizii COOPER 1861 (partim)
Gopherus agassizii — STEJNEGER 1893 (partim)
Scaptochelys agassizii — BRAMBLE 1982 (partim)
Xerobates lepidocephalus — OTTLEY & VELÁZQUES-SOLIS 1989 (in error)
Xerobates lepidocephalus — CRUMLY & GRISMER 1994 (in error)
Gopherus morafkai — MURPHY et al. 2011 (partim)
Gopherus evgoodei — TTWG 2021 
DistributionMexico (Sonora, Sinaloa)

Type locality: Alamos (approximate location 27°02'N, 108°55'W, elevation 433 m), Sonora, Mexico  
TypesHolotype: AMNH 64160 (American Museum of Natural History); adult male, collected on 27 August–2 September 1942 by Charles M. Bogert and preserved in ethanol (Figs 6–14). Paratypes. AMNH 64157, an adult male; AMNH 64158, an adult female; and ROM (Royal Ontario Museum) 53301 (formerly AMNH 64159), an adult female; all with same collecting data as the holotype and all preserved in ethanol. 
DiagnosisDiagnosis. Molecular data can readily diagnose all species of Gopherus and their hybrids (Murphy et al. 2011; Edwards et al. 2016). Morphologically, G. evgoodei, G. agassizii and G. morafkai (the agassizii group) can be separated generally from both G. flavomarginatus Legler and G. polyphemus (Daudin) in having relatively smaller front feet. Whereas the distance from the bases of the first to fourth claws is the same on all feet in the agassizii group, in the latter two species the distance from the bases of the first and third claws on the forelimb is about the same as the distance between the bases of the first and fourth claws on the hindlimb (Auffenberg and Franz 1978). Living captive specimens of the agassizii group and G. berlandieri cannot all be dis- tinguished morphologically because of extensive hybridization (Edwards et al. 2010) and developmental abnormalities in shell, head and limb integument from poor nutri- tion (Donoghue 2006). However, in native non-hybrid individuals, G. berlandieri can be separated from the agassizii group in having a wedge-shaped snout when viewed from above in contrast to a rounded snout (Fig. 12) (Auffenberg and Franz 1978). Further, the gular projections of G. berlandieri often diverge in large males and the species often exhibits paired axillary scales preceding each bridge. In contrast, the gular projections do not normally diverge in the agassizii group and there is a single axillary scale. Morphological characters among the agassizii group exhibit overlap (Germano 1993; McLuckie et al. 1999) and characters like coloration in desert tortoises can be highly variable (Legler and Vogt 2013). However, G. evgoodei differs from G. morafkai and G. agassizii (Table 1). Gopherus evgoodei is flatter in shell profile (Fig. 2). It has rounded foot pads, multiple enlarged spurs on the radial-humeral joint (Fig. 3). The new species has short tails (Fig. 4), orange tones in the integument (skin) and shell (Fig. 5), and a distinctly shallower concavity on the plastron of males.
CommentDistribution: see map in Murphy et al. 2016: 133.

Hybridization: Gopherus evgoodei hybridizes with G. morafkai in C Sonora. 
EtymologyThe new species is a patronym, a noun in the genitive case, in recognition of Eric V. Goode, a conservationist, naturalist, and founder of the Turtle Conservancy. He has contributed generously to the conservation of this species via the preservation of land in Mexico, and he actively pursues the conservation of turtles and tortoises on a global scale. Eric sets an important precedent by complementing this taxonomic description with a tangible action that contributes to the conservation of the new species in its native habitat. 
  • Bramble DM 1982. Scaptochelys: generic revision and evolution of gopher tortoises. Copeia 1982: 852–867, doi: 10.2307/1444097 - get paper here
  • Cooper, J,G. 1861. New Californian Animals. Proc. California Acad. Vol. 2: 118-123 - get paper here
  • Crumly, C. R. & Grismer, L.L. 1994. Validity of the tortoise Xerobates lepidocephalus OTTLEY and VELAZQUES in Baja California. Fish and Wildlife Research 13: 33-37
  • Edwards T, Karl AE, Vaughn M, Rosen PC, Torres CM, Murphy RW 2016. The desert tortoise trichotomy: Mexico hosts a third, new sister-species of tortoise in the Gopherus morafkai–G. agassizii group. ZooKeys 562: 131-158. doi: 10.3897/zookeys.562.6124 - get paper here
  • Lara-Resendiz, R. & Sauceda-Nieblas, R. 2022. Intento de depredación de la serpiente Drymarchon melanurus sobre la tortuga Gopherus evgoodei. Revista Latinoamericana de Herpetología, 5(1), 13-14 - get paper here
  • Lara-Resendiz, R. A., Miles, D., Rosen, P. & Sinervo, B. 2022. Micro and macroclimatic constraints on the activity of a vulnerable tortoise: a mechanistic approach under a thermal niche view. Functional Ecology - get paper here
  • Lara-Reséndiz, R. A., Rosen, P., Sinervo, B., Miles, D. B. & Méndez-De la Cruz, F. R. 2022. Habitat thermal quality for Gopherus evgoodei in tropical deciduous forest and consequences of habitat modification by buffelgrass. Journal of Thermal Biology, 104, 103192 - get paper here
  • Lemos-Espinal JA, Smith GR 2020. A checklist of the amphibians and reptiles of Sinaloa, Mexico with a conservation status summary and comparisons with neighboring states. ZooKeys 931: 85-114 - get paper here
  • Lemos-Espinal JA, Smith GR, Rorabaugh JC 2019. A conservation checklist of the amphibians and reptiles of Sonora, Mexico, with updated species lists. ZooKeys 829: 131-160 - get paper here
  • Murphy, Robert W.;Kristin H. Berry, Taylor Edwards, Alan E. Leviton, Amy Lathrop, J. Daren Riedle 2011. The dazed and confused identity of Agassiz’s land tortoise, Gopherus agassizii (Testudines, Testudinidae) with the description of a new species, and its consequences for conservation. ZooKeys 113: 39–71; doi: 10.3897/zookeys.113.1353 - get paper here
  • Ottley, John R.; Solis, Victor M. Velazques 1989. An Extant, Indigenous Tortoise Population in Baja California Sur, Mexico, with the Description of a New Xerobates (Chelonii: Testudinidae). Great Basin Naturalist 49 (4): 496 - get paper here
  • Stejneger, L.H. 1893. Annotated list of the reptiles and batrachians collected by the Death Valley Expedition in 1891, with descriptions of new species. North American Fauna, No. 7: 159-228 (+ 14 plates + 4 maps) - get paper here
  • TTWG; Rhodin, A.G.J., Iverson, J.B., Bour, R., Fritz, U., Georges, A., Shaffer, H.B., and van Dijk, P.P. 2021. Turtles of the World: Annotated Checklist and Atlas of Taxonomy, Synonymy, Distribution, and Conservation Status (9th Ed.). In: Rhodin, A.G.J., Iverson, J.B., van Dijk, P.P., Stanford, C.B., Goode, E.V., Buhlmann, K.A., and Mittermeier, R.A. (Eds.). Chelonian Research Monographs 8:1–472. doi:10.3854/crm.8.checklist.atlas.v9.2021. - get paper here
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