Madatyphlops boettgeri (BOULENGER, 1893)
Can you confirm these amateur observations of Madatyphlops boettgeri?
|Higher Taxa||Typhlopidae (Madatyphlopinae), Typhlopoidea, Serpentes, Squamata (snakes)|
|Common Names||Sand Worm Snake|
|Synonym||Typhlops boettgeri BOULENGER 1893: 39|
Typhlops boettgeri — WALLACH & GLAW 2009
Madatyphlops boettgeri — HEDGES et al. 2014
- Region according to the TDWG standard, not a precise distribution map.
NOTE: TDWG regions are generated automatically from the text in the distribution field and not in every cases it works well. We are working on it.
|Comment||Typhlops boettgeri Boulenger (1893) was recognized as a valid species until 1958 when it was synonymized with T. arenarius by Guibé. These two taxa are perhaps sibling species because they are very similar with considerable variation and overlap in many characters. Typhlops boettgeri exhibits 20–21 midbody scale rows, T. arenarius has 20–24 midbody rows, T. mucronatus has 24–26 midbody rows, and T. decorsei has 26–28 midbody rows; none of the remaining species in Madagascar varies in midbody scale rows.|
Typhlops boettgeri and T. arenarius are known to be sympatric from at least four localities (Andrahomana, Mahafaly, Tsimanapetsotsa, and Vohisandria: see Appendix). Typhlops boettgeri can be distinguished from T. arenarius by the following characters: coloration (bicolored with distinct separation of dorsal and ventral colors vs. unicolored), lateral head shape (not depressed and domed vs. depressed and obtusely pointed), dorsal rostral shape (circular vs. parallel), lateral rostral shape (angled vs. curved), position of eyes (prefrontal vs. frontal-prefrontal suture), “X”-shaped cross on head dorsum (absent vs. present), body proportion (< 50 vs. > 50), lateral tongue papillae (present vs. absent), anterior liver lobe extension (0–4% vs. 15–25%), right systemic arch junction craniad of heart tip (5–6% vs. 3–4%), total lung midpoint (29–35% vs. 28–29%), right lung midpoint (40–46% vs. 38–39%), posterior tip of lung (50–62% vs. 47–49%), and total kidney length (8–9% vs. 5–7%). WALLACH & GLAW (2009) therefore do not recognize the synonymy of T. boettgeri and T. arenarius and consider Typhlops boettgeri to be a valid species.
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