Siagonodon septemstriatus (SCHNEIDER, 1801)
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Siagonodon septemstriatus
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| Higher Taxa | Leptotyphlopidae, Epictinae, Epictini, Typhlopoidea, Serpentes, Squamata (snakes) |
| Subspecies | |
| Common Names | E: Seven-striped Blind Snake Portuguese: Cobra-Cega, Fura-Terra |
| Synonym | Anguis septem-striatus SCHNEIDER 1801: 341 Leptotyphlops tatacua BRICENO-ROSSI 1934 Typhlops senptemstriatus WAGLER 1830: 196 (lapsus) Catodon septem-striatus — DUMÉRIL & BIBRON 1844: 319 Stenostoma (Catodon) septemstriatum — JAN 1860 Siagonodon septemstriatus — PETERS 1881 Glauconia septemstriata — BOULENGER 1893: 71 Leptotyphlops septemstriatus — MERTENS 1925: 78 Leptotyphlops tatacua BRICENO-ROSSI 1934 Leptotyphlops septemstriata — BEEBE 1946: 13 Leptotyphlops septemlineata HOFFSTETTER & GASC 1969 (lapsus) Leptotyphlops septemstriatus — STARACE 1998: 79 Leptotyphlops septemstriatus — MCDIARMID, CAMPBELL & TOURÉ 1999: 42 Leptotyphlops septemstriatus — GORZULA & SEÑARIS 1999 Siagonodon septemstriatus — ADALSTEINSSON, BRANCH, TRAPE, VITT & HEDGES 2009 Siagonodon septemstriatus — WALLACH et al. 2014: 666 Siagonodon septemstriatus — NOGUEIRA et al. 2019 |
| Distribution | N Brazil (Para, Amazonas, Roraïma), Guyana, French Guiana, SE Venezuela, Bolivia Type locality: unknown (fide KORNACKER 1999). |
| Reproduction | oviparous |
| Types | Holotype: RMNH (type status and ID uncertain, fide E. Dondorp, pers. comm., 28 Jan 2019; a specimen of Typhlophis squamosus in RMNH has a hand-written note saying that it may be Typhlops septemstriatus or its type). |
| Diagnosis | Diagnosis (genus): Species of Siagonodon have 14 midbody scale rows, 10–14 midtail scale rows, 206–289 middorsal scale rows, 8–20 subcaudals, two supralabials, small or moderate or large anterior supralabials, 202–300 mm maximum adult total length, a body shape of 39–130 (total length/width), a relative tail length of 2.1–6.6%, a tail shape of 1.3–2.6, striped pattern, multiple dorsal colors, and white venter (Table 2). They also lack a supraocular scale. The absence of a supraocular scale distinguishes this genus from the other genus in the subtribe, Epictia (except E. nasalis). Other traits distinguishing the two genera show overlap, but species of Siagonodon tend to have fewer midtail scale rows and a white venter (Table 2). Only one species of this genus was sequenced (from ADALSTEINSSON et al. 2009). Additional details (2266 characters) are available for collaborators and contributors. Please contact us for details. |
| Comment | Type species: Anguis septem-striatus SCHNEIDER 1801 is the type species of the genus Siagonodon PETERS 1881. Synonymy: Mertens (1925) placed the genus Siagonodon in the synonymy of Leptotyphlops Fitzinger (1843) Distribution: see Martins et al. 2020: 852 (Fig. 12) for a map of all 4 Siagonodon species, the sister clade of Habrophallos. See map in Nogueira et al. 2019. |
| Etymology | Named after the seven (Latin: septem) stripes (Latin: stria) that are characteristic for this species (or at least some specimens). The genus name is derived from the Greek nouns siagon (jaw) and odon (tooth), probably in allusion to the presence of teeth only on the lower jaw. Genus names ending in -odon are typically masculine. |
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