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Cnemidophorus duellmani MCCRANIE & HEDGES, 2013

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Higher TaxaTeiidae, Teiinae, Gymnophthalmoidea, Sauria, Squamata (lizards)
Common Names 
SynonymCnemidophorus duellmani MCCRANIE & HEDGES 2013
Cnemidophorus lemniscatus lemniscatus – BURT 1931: 30 (part)
Cnemidophorus lemniscatus lemniscatus – BREDER 1946: 428
Cnemidophorus lemniscatus — ECHTERNACHT 1968: 153 (part)
Cnemidophorus lemniscatus — JARAMILLO et al. 2010: 621 
DistributionPanama (Darién)

Type locality: El Real de Santa María, Darién Province, Panama  
Reproductionoviparous (manual imputation, fide Zimin et al. 2022) 
TypesHolotype: KU 80542, an adult male, collected 9 January 1964 by William E. Duellman and Charles J. Cole. Anonymous (1969) gave the coordinates 8°08’N, 77°43’W for El Real de Santa María. Paratypes (14). KU 80552, 80562, 80564, 80566, 80568 (all adult males), KU 80558, 80572, 80574, 80576– 77, 80580 (all adult females), KU 80581 (subadult male), KU 80582–83 (both juveniles), all with the same locality data as the holotype, except some collected 10 January 1964. 
DiagnosisDiagnosis: Cnemidophorus duellmani can be distinguished from all other species in the C. lemniscatus species group (see Introduction, Harvey et al. 2012) by being the only species to have ten transverse ventral plates (Fig. 8) at the level of the fifteenth, sixteenth, and/or seventeenth ventral row (see Harvey et al. 2012: 105 who gave eight ventrals for species in the C. lemniscatus group). In addition, it differs further from C. ruatanus, the only other Central American species of the group, in having broad contact between the precloacal pair of enlarged plates, without a small scale extending anteriorly between those two plates (Fig. 9), in having 8–15 (both sides combined) small scales bordering the posterior edge of supraocular four, in having a mean of 6.2 scales (both sides combined) between supraocular four and the outer parietal, and 8–15 (11.8 ± 2.0) circumorbitals; (versus paired precloacal plates frequently entirely separated by a small scale [Fig. 5], or separated at least one-third of its distance by a small scale, 4–9 small scales bordering supraocular four, a mean of 4.0 small scales between supraocular four and outer parietal, and 2–9, x = 4.2 ± 1.4 circumorbitals in C. ruatanus). 
CommentSynonymy: after MCCRANIE & HEDGES 2013

Habitat. Duellman recorded in his field notes that the type series of Cnemidophorus duellmani was “found in open areas.” Breder (1946: 428) recorded the species was “Common along the lower reaches [of the Río Chucunaque and Río Chico valleys] in open fields.” Sexton et al. (1964: 293) studied this species at a site along the Río Chucunaque and stated that the “Cnemidophorus is commonly associated with areas having a low percentage of vegetation coverage as well as plants low in height.” Breder (1946: 382) recorded the region encompassing the Panamanian Río Tuira and Río Chucunaque region and tributaries where Cnemidophorus duellmani occurs as in the “Lower Arid Zone,” whereas Jaramillo et al. (2010: 621) considered C. duellmani as occurring in the “Lowland Wet/Moist Forest.” Curiously, none of the authors who presented ecological data on this species mentioned the presence or absence of “foot waving,” which is usually present in members of the C. lemniscatus group.

Abundance: only known from its original description (Meiri et al. 2017). 
EtymologyNamed after William E. Duellman (1930-2022) of the University of Kansas. Bill was not only one of the collectors of the type series, but has also produced two significant studies of Mexican and Guatemalan species groups of lizards, which at those times were considered to be members of the genus Cnemidophorus (now Aspidoscelis). For biographical notes see Burrowes et al. 2022, Mendelsohn 2022, and 2022 and Coloma & Guayasamin 2022. 
  • Breder, C. M. 1946. Amphibians and reptiles of the Rio Chucunaque drainage, Darién, Panamá, with notes on their life histories and habitats. Bull. Amer. Mus. Nat. Hist. 86: 379-435 - get paper here
  • Burt, C. E. 1931. A study of the teiid lizards of the genus Cnemidophorus with special reference to their phylogenetic relationships. Bull. US Natl. Mus. 154: 286 pp. - get paper here
  • Coloma, Luis A.; Juan M. Guayasamin 2022. Obituary: William E. Duellman (1930–2022) Phyllomedusa 21(2): 103-111 - get paper here
  • Echternacht, A. C. 1968. Distributional and ecological notes on some reptiles from northern Honduras. Herpetologica 24: 151-58. - get paper here
  • Jaramillo, C., L. D. Wilson, R. Ibáñez, and F. Jaramillo 2010. The herpetofauna of Panama: distribution and conservation status. In L. D. Wilson, J. H. Townsend, and J. D. Johnson (eds.), Conservation of Mesoamerican Amphibians and Reptiles. Eagle Mountain Publishing LC, Eagle Mountain, Utah, Pg. 604–671
  • MCCRANIE, JAMES R.; S. BLAIR HEDGES 2013. A review of the Cnemidophorus lemniscatus group in Central America (Squamata: Teiidae), with comments on other species in the group. Zootaxa 3722 (3): 301–316 - get paper here
  • Meiri, Shai; Aaron M. Bauer, Allen Allison, Fernando Castro-Herrera, Laurent Chirio, Guarino Colli, Indraneil Das, Tiffany M. Doan, Frank Glaw, Lee L. Grismer, Marinus Hoogmoed, Fred Kraus, Matthew LeBreton, Danny Meirte, Zoltán T. Nagy, Cristiano d 2017. Extinct, obscure or imaginary: the lizard species with the smallest ranges. Diversity and Distributions - get paper here
  • Zimin, A., Zimin, S. V., Shine, R., Avila, L., Bauer, A., Böhm, M., Brown, R., Barki, G., de Oliveira Caetano, G. H., Castro Herrera, F., Chapple, D. G., Chirio, L., Colli, G. R., Doan, T. M., Glaw, F., Grismer, L. L., Itescu, Y., Kraus, F., LeBreton 2022. A global analysis of viviparity in squamates highlights its prevalence in cold climates. Global Ecology and Biogeography, 00, 1–16 - get paper here
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