Shield morphology of curly overhair in 22 genera of Soricidae (Insectivora, Mammalia)

Details

Serval ID
serval:BIB_8541011CF3B4
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Shield morphology of curly overhair in 22 genera of Soricidae (Insectivora, Mammalia)
Journal
Revue Suisse de Zoologie
Author(s)
Ducommunm M.A., Jean-Maire-Besançon F., Vogel P.
ISSN
0035-418X
Publication state
Published
Issued date
1994
Volume
101
Number
3
Pages
623-643
Language
english
Abstract
The structure of the shield of curly overhairs was studied in 22 genera of shrews, using scanning electron microscopy. The cross section of the shield is quadriconcave with two sides showing particular scale patterns or a relief which can be grouped into 4 morphological types: 1) a smooth type with, at most, shallow U-shaped notches; 2) a type with uniserial, V-shaped tiled notches; 3) a type with a groove and irregular notches; 4) a type with a deep ridged groove. Myosorex, which occupies a basal phyletic position, shows type 3. This type is therefore interpreted as an ancestral character state. It is found also in Feroculus and in some Sylvisorex. In the Crocidurinae, this type evolved into type 2 (Scutisorex and some Indomalayan Crocidura), and finally into type 1 (Suncus and most Crocidura). In the Soricinae, it evolved into type 4, which is common to all genera except Megasorex and Notiosorex. These two genera possess type 1 which is interpreted as being a synapomorphous character of these genera. The regression of the complex structure under dry climatic conditions supports the hypothesis that the function of the grooved form of hair is water repulsion.
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Create date
24/01/2008 17:32
Last modification date
20/08/2019 14:44
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