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Higher TaxaTyphlopidae (Typhlopinae), Typhlopoidea, Serpentes, Squamata (snakes)
Common Names 
SynonymAmerotyphlops arenensis GRABOSKI, PEREIRA-FILHO, SILVA, COSTA PRUDENTE & ZAHER 2015
Amerotyphlops arenensis — NOGUEIRA et al. 2019 
DistributionBrazil (Paraíba)

Type locality: Reserva Ecológica Mata do Pau Ferro (06° 58'12'' S, 35° 42'15'' W; ca. 600 m), municipality of Areia, state of Paraíba, Brazil  
TypesHolotype: MZUSP 20042, An adult male, collected by Gentil P. Filho on 19 November 2008. Paratypes. Eighteen specimens all collected in the type locality by Gentil P. Filho. MZUSP 20037–38 collected in 16 October 2008, MZUSP 20039 collected in 17 October 2008, MZUSP 20040–41 collected in 19 November 2008, MZUSP 20136 collected in 19 November 2008, MZUSP 20043–45 collected in 17 December 2008,MZUSP20046 collected in 18 December 2008, MZUSP 20047 and MZUSP 21273 collected in 21 January 2009, MZUSP 20048 collected in 28 February 2009, MZUSP 20049–50 and MZUSP 21274 collected in 27 March 2009, MZUSP 20051 collected in 23 April 2009, and MZUSP 20052 collected in 21 May 2009. 
DiagnosisDiagnosis. Amerotyphlops arenensis is distinguished from all other South American species by the following combination of characters: nasal suture incomplete; rostral scale oval; supralabial scales four; infralabial scales three; rows scales around the body 18/18/18; middorsal scales 204 to 225; rows of dorsal scales dark brown 12–13th; rows of ventral scales yellowish cream and immaculate 4–5; caudal spine dark brown; subcaudal scales 8–10 in female and 11–13 for males; and maximum TTL 233 mm.
The new species differs from Amerotyphlops lehneri by having an incomplete nasal suture (vs. complete nasal suture); from A. brongersmianus, A. reticulatus, and A. minuisquamus by having 18/18/18 rows scales around the body (vs. 18/16/14, 18/18/14, 20/18/14 or 20/18/15 in A. minuisquamus; 20/20/18 or 20/20/20 in A. brongersmianus and A. reticulatus); from A. yonenagae by having less than 250 middorsal scales (vs. more than 250 middorsal); from A. amoipira by having highly pigmented cephalic scales with a dark brown dorsum (vs. few pigmented cephalic scales, creamish brown dorsum with a fine darker brown paravertebral line concentrated in the anterior part of the body) and from A. paucisquamus by having a largest number of middorsal, between 204–225 (vs. fewer number of middorsal, between 162–209). 
EtymologyEtymology. The specific epithet is derived from the Latin name “arena”, a reference to the name of the type locality of the new species, the municipality of Areia. 
  • Graboski R, Arredondo JC, Grazziotin FG, et al. 2018. Molecular phylogeny and hemipenial diversity of South American species of Amerotyphlops (Typhlopidae, Scolecophidia). Zool Scripta 2018;00:1–18 - get paper here
  • GRABOSKI, ROBERTA; GENTIL ALVES PEREIRA FILHO, ARIANE AUXILIADORA ARAÚJO DA SILVA, ANA LÚCIA DA COSTA PRUDENTE, HUSSAM ZAHER 2015. A new species of Amerotyphlops from Northeastern Brazil, with comments on distribution of related species. Zootaxa 3920 (3): 443–452 - get paper here
  • Nogueira, Cristiano C.; Antonio J.S. Argôlo, Vanesa Arzamendia, Josué A. Azevedo,<br />Fausto E. Barbo, Renato S. Bérnils, Bruna E. Bolochio, Marcio Borges-Martins,<br />Marcela Brasil-Godinho, Henrique Braz0, Marcus A. Buononato, Diego F. Cisnero 2019. Atlas of Brazilian snakes: verified point-locality maps to mitigate the Wallacean shortfall in a megadiverse snake fauna. South American J. Herp. 14 (Special Issue 1):1-274 - get paper here
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