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Rena iversoni (SMITH, BREUKELEN, AUTH & CHISZAR, 1998)

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Higher TaxaLeptotyphlopidae, Epictinae, Epictini, Typhlopoidea, Serpentes, Squamata (snakes)
Common NamesE: Iverson's Blindsnake
S: Culebrilla Ciega de Iverson 
SynonymLeptotyphlops dulcis iversoni SMITH, BREUKELEN, AUTH & CHISZAR 1998
Leptotyphlops myopicus iversoni — DIXON & VAUGHAN 2003
Rena myopica iversoni — ADALSTEINSSON et al. 2009 (by implication)
Rena iversoni — WALLACH et al. 2014: 632
Rena iversoni — FLORES-VILLELA et al. 2022 
DistributionMexico (Tamaulipas)

Type locality: oak woodland in the vicinity of Hwy 101, 23.7 km SW Rio San Marcos (in turn 8.1 km SW Cd. Victoria), Tamaulipas, Mexico, 36.5 km NE of Jaumave.  
Reproductionoviparous (manual imputation, fide Zimin et al. 2022) 
TypesHolotype: UF (formerly Florida State Museum of Natural History) 105870, 11 May 1981, John B. Iverson (field no. 81JI557) 
DiagnosisRena iversoni, unlike all other populations formerly in the R. dulcis group, lacks supraoculars in most known specimens (10 out of 13). Smith et al. (1998) described this taxon as a subspecies of R. dulcis, based on it having 10 scales around the tail. FLORES-VILLELA et al. 2022 agree that the affinities of this taxon are with the R. dulcis group. The absence of supraoculars in R. iversoni may be the result of fusion of the ocular and supraocular scales. FLORES-VILLELA et al. 2022 consider the diagnostic features of this taxon are variable, although they may have systematic value. The matter needs to be resolved using molecular techniques. FLORES-VILLELA et al. 2022 provisionally accept the status as valid species, pending more evidence. 
CommentSynonymy: Listed as synonym of Rena myopica by Heimes 2016: 31 but considered “tentatively” valid by FLORES-VILLELA et al. 2022. 
EtymologyNamed after Professor Dr. John Burton Iverson III (b. 1949), American herpetologist at the Department of Biology, Eadham College, Indiana. 
  • Adalsteinsson, S.A.; Branch, W.R.; Trapé, S.; Vitt, L.J. & Hedges, S.B. 2009. Molecular phylogeny, classification, and biogeography of snakes of the Family Leptotyphlopidae (Reptilia, Squamata). Zootaxa 2244: 1-50 - get paper here
  • Dixon, James R.; Vaughan, Kathryn R. 2003. The Status of Mexican and Southwestern United States Blind Snakes Allied with Leptotyphlops dulcis (Serpentes: Leptotyphlopidae). Texas Journal of Science 55 (1):3-24 - get paper here
  • Smith, H.M.; Breukelen, Auth, Chiszar 1998. A subspecies of the Texas blind snake (Leptotyphlops dulcis) without supraoculars. Southwestern Naturalist 43: 437-440 - get paper here
  • Terán-Juárez, Sergio A., Elí García Padilla, Vicente Mata-Silva, Jerry D. Johnson and Larry David Wilson. 2016. The herpetofauna of Tamaulipas, Mexico: composition, distribution, and conservation status. Mesoamerican Herpetology 3 (1): 43–113 - get paper here
  • Wallach, Van; Kenneth L. Williams , Jeff Boundy 2014. Snakes of the World: A Catalogue of Living and Extinct Species. [type catalogue] Taylor and Francis, CRC Press, 1237 pp.
  • 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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