Browsing by Author "Rasmussen, Jens B."

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    The Current Status of the Rare Usambara Mountain Forest-Viper, Atheris Ceratophorus WERNER, 1895, Including A Probable New Record Of A. Nitschei Rungweensis BOGERT, 1940, And A Discussion Of Its Validity (Reptilia, Serpentes, Viperidae)
    (1981-12) Rasmussen, Jens B.; Howell, Kim
    The recent collecting of five specimens of Atheris ceratophorus WERNER, 1895, together with an examination of material already deposited in various museums documents new records outside the Usambara Mountains to which the species had been believed to be endemic. Lepidosis and hemipenial characters have been investigated and tabulated to give an impression of the intraspecific variation. The data of the new specimens provide some information on the natural history of this species. The validity of A. nitschei rungweensis is discussed and a probable new record is given.
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    A review of Barbour's Short-headed Viper, Adenorhinos barbouri (Serpentes: Viperidae)
    (1997-12) Rasmussen, Jens B.; Howell, Kim
    The recent collection of 13 specimens of the Tanzanian endemic Adenorhinos barbouri more than doubles the number of known specimens of this rare viper. Internal and external characters were examined in the older and the more recently collected specimens and character variation has been summarized. Based on limited information from collectors' notes and dissection of the alimentary canal, A. barbouri appears to be a species of the forest floor; both juveniles and adults prey on earth-worms and adults may also feed on anurans.
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    A review of the Usambara forest snake Geodipsas vauerocegae and the Uluguru forest snake G. procterae
    (1994-12) Rasmussen, Jens B.; Howell, Kim; Andersen, Mogens; Andersen, Mogens
    Variation in external and internal characters of the endemic Tanzanian species Geodipsas vauerocegae and G. procterae have been examined. On the basis of the small sample sizes, no significant geographical differences can be demonstrated. Three recently collected specimens from the Udzungwa Mountains, however, seem to have slightly lower numbers of ventrals than those from the Uluguru Mountains. All available knowledge on the natural history of the species has been summarized