Reproductive ecology and diet of the fossorial snake Phalotris lativittatus in the Brazilian Cerrado
Fossorial snakes have attracted little scientific attention in studies of natural history, despite their relevance to capture the range of evolutionary-ecological strategies of snakes. In this study, we examined 62 preserved specimens of Phalotris lativittatus (a member of the fossorial and poorly studied Elapomorphini tribe) to obtain information about sexual dimorphism, reproduction, seasonal activity and diet. Males were smaller than females but had longer tails, larger heads and were more heavy-bodied. Females attained sexual maturity at larger body sizes than males. Reproduction is seasonal in both sexes. Vitellogenesis started in mid-autumn, and peaked from late spring to summer. Oviductal eggs and oviposition were recorded from late spring to early summer, while hatchings occurred from late summer to autumn. Clutch size was low, a recurrent trait in fossorial snakes. Spermatogenesis began in autumn, peaked during spring and testicular quiescence occurred in summer. The ductus deferens contained sperm only in spring, when the sexual segment of the kidneys showed dense secretory granules and males were more active. Thus, we suggest that mating is likely to occur in spring. Diet is specialised in amphisbaenids, and no evidence of ontogenetic shift was detected. This is the first quantitative study on the ecology of an Elapomorphini species.
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Document Type: Research Article
Publication date: January 1, 2014
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- The Herpetological Journal is an international scientific journal that publishes papers on the natural history of amphibians and reptiles. Experimental, observational and theoretical studies are published along with reviews and book reviews. Faunistic lists, letters and results of general surveys are not published unless they shed light on herpetological problems of wider significance.
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