You are here » home advanced search search results Amerotyphlops martis


Can you confirm these amateur observations of Amerotyphlops martis?

Add your own observation of
Amerotyphlops martis »

We have no photos, try to find some by Google images search: Google images

Higher TaxaTyphlopidae (Typhlopinae), Typhlopoidea, Serpentes, Squamata (snakes)
Common Names 
DistributionBrazil (Espírito Santo)

Type locality: Praia das Neves (21° 16′ 45.59′′ S, 40° 57′ 47.86′′ W), municipality of Presidente Kennedy, state of Espírito Santo, Brazil.  
TypesHolotype: MNRJ 18744, adult male, collected by Ana C. C. Lourenço and Délio Baêta between 2 and 8 September 2009 (Fig. 12; Supporting Information, Fig. S5).
Paratypes: Three male specimens, MNRJ 18743, MNRJ 18745 and MNRJ 18747, collected in the same locality of the holotype by Ana C. C. Lourenço and Délio Baêta between 2 and 8 September 2009 (Supporting Information, Fig. S6A–F). 
DiagnosisDiagnosis: “This species is distinguished from all other South American congeneric species by the unique combination of the following of characters: (1) nasal suture incomplete; (2) rostral scale oval; (3) supralabial scales four; (4) infralabial scales three; (5) rows scales around the body 20/20/18–20; (6) mid-dorsal scales 208– 217; (7) ventral scales 195–211; (8) rows of dorsal scales pale brown 12–13; (9) rows of ventral scales yellowish cream and immaculate four to five; (10) caudal spine pale brown; (11) subcaudal scales ten to 12; (12) maximum TTL 170 mm; (13) maximum TL 6.13 mm; (14) nasal process of premaxilla contacting the vertical laminae of the nasals in the anterodorsal and posteroventral portions, with the central portion not in contact, leaving a large round canal between the olfactory chambers; (15) large palatine fossa on the lateral side of the maxilla; (16) maxilla with a concave medial border; (17) ventral pterygoid process of palatine straight; (18) ratio between length of ventral pterygoid process of palatine and skull length 0.06; (19) angle between mandibular condyle articulation and the retroarticular process of the compound bone close to 90°; (20) Dorsal surface of dentary bone with two evident foramina; and (21) hemipenis single, with an additional structure in the apical cup, with a tissue projection in the form of a curved papilla.
Amerotyphlops martis differs from A. costaricensis, A. lehneri, A. microstomus, A. stadelmani, A. tasymicris, A. tenuis, A. trinitatus and A. tycherus by having an incomplete nasal suture (vs. complete nasal suture); from A. arenensis, A. caetanoi, A. amoipira, A. minuisquamus, A. paucisquamus and A. yonenagae by having 20/20/18 or 20/20/20 rows scales around the body (vs. 18/16/14, 18/18/14, 20/18/14 or 20/18/15 in A. minuisquamus and 18/18/18 in A. arenensis, A. caetanoi, A. amoipira, A. paucisquamus and A. yonenagae); from A. reticulatus by having pigmented cephalic scales with a pale brown dorsum and tail (vs. a yellowish and few pigmented cephalic scales, dorsum brown or black and dorsum tail black with cream or yellow spot); from A. montanus by having a smaller total length (TTL), between 130 and 170 mm (vs. larger total length 216 mm); and from A. brongermianus by having a small midbody diameter (MBD), between 4.090 and 5.133 mm and a single hemipenis with an additional structure in the apical cup, a large papillae projected laterally from the tip that extends horizontally over the proximal portion of the apical cup (vs. robust midbody diameter, between 5.03 and 14.76 mm and a single hemipenis with an unornamented apical cup). Table 1 shows additional morphometric characters and scale patterns found in A. martis and morphologically similar species distributed in southern and north-eastern Brazil.” (Graboski et al. 2022)

Description of the holotype: “Adult male, TTL 157 mm, TL 6.13 mm, MBD/(SVL-HR) 0.032 mm and TL/SVL 24.61 mm. Head slightly depressed dorsoventrally, not wider than ‘neck’. Snout round in dorsal and ventral views. Rostral oval, longer than wide, narrow at anteroposterior region and wider at medial region; visible in dorsal view, extending ventrodorsally without reaching the imaginary transverse line between anterior borders of eyes. Rostral contacting nasal (anterior and posterior) dorsolaterally and first supralabial and anterior nasal scales ventrally. Nasal suture incomplete, only partially dividing the anterior and posterior portions of nasal scale. Suture begins in the upper edge of second supralabial, passes through nostril, but fails to reach rostral. Anterior nasal in contact with first infralabial and upper edge of second infralabial. Posterior nasal longer than wide, contacting upper margin of second supralabial and preocular. Supralabials four, fourth twice longer than third. Infralabials three, third largest. Eye diameter 0.90 mm; eyes not visible in ventral view, located dorsolaterally, close to suture between preocular and ocular scales, completely covered by ocular scale. Ocular scales contacting frontal. Body cylindrical and robust. Midbody diameter 4.86 mm. Dorsal and ventral scales cycloid, wider than long, highly imbricated and arranged in diagonal series; scale rows around the body 20/20/18. Mid-dorsal scales 215. Ventral scales 211. Cloacal plate rounded, bordered anteriorly by three rows of scales and posteriorly by five rows of scales. Subcaudal scales 11, excluding the terminal spine.” (Graboski et al. 2022)

Coloration of the holotype in preservative: “Dorsum (13/11/13 rows scales) pale brown. In the dorsal part of the body up to the tail, a fine darker brown reticulum, particularly concentrated in the central part of dorsal scales (Supporting Information, Fig. S5A). Venter (7/9/5 rows scales) pale cream (Supporting Information, Fig. S5B). Dorsal portions of snout pale cream, with a few light brown spots, covering partially both rostral and nasal scales (Fig. 12A, B). The ventral portion of snout pale cream and immaculate (Fig. 12C). Symphysial region pale cream and immaculate (Fig. 12C). Dorsal head scales (supraoculars, frontal, postfrontal, parietals and occipitals) and dorsal portions of lateral head scales (ocular, nasal and lower nasal) predominantly pale cream with few pale brown spots (Fig. 12A, B) and ventral portions pale cream (Fig. 12C). Cloacal plate pale cream and terminal spine creamy pale brown (Supporting Information, Fig. S5B).” (Graboski et al. 2022)

Variation of paratypes: “Number of subcaudal scales tento12(mean=11,SD=1,N=3).Taillength2.95– 3.20% of TTL (N = 3). Largest male with 170 mm TTL. MBD 4.09–5.13 mm (mean = 4.61, SD = 0.52, N = 3); number of mid-dorsal scales 208–217 (mean = 212.3, SD = 4.50, N = 3); number of ventral scales 195–208 (mean = 201.0, SD = 6.55, N = 3); and number of scale rows around the body 20/20/18 (N = 2) or 20/20/20 (N = 1). The colour patterns of the paratypes are similar to that found in the holotype (Supporting Information, Fig. S6A–F).” (Graboski et al. 2022) 
CommentDistribution: for a map see Graboski et al. 2022: 16 (Fig. 10). 
EtymologyThe specific epithet is derived from the Latin name ‘Mars’, in allusion to the Mars symbol, used to represent the male gender. The choice of the name is a reference to the distinct hemipenial morphology of this species that differs from all other species of Amerotyphlops. 
  • Graboski, Roberta; Juan C Arredondo, Felipe G Grazziotin, Ricardo Arturo Guerra-Fuentes, Ariane A A Da Silva, Ana L C Prudente, Roberta R Pinto, Miguel T Rodrigues, Sandro L Bonatto, Hussam Zaher 2022. Revealing the cryptic diversity of the widespread and poorly known South American blind snake genus Amerotyphlops (Typhlopidae: Scolecophidia) through integrative taxonomy. Zoological Journal of the Linnean Society, zlac059 - get paper here
External links  
Is it interesting? Share with others:

As link to this species use URL address:

without field 'search_param'. Field 'search_param' is used for browsing search result.

Please submit feedback about this entry to the curator