Literaturdatenbank
Literaturdatenbank |
|
 |
|
Winokur, R. M., & Legler, J. M. (1975). Chelonian mental glands. Journal of Morphology, 147, 275–292.
Added by: Admin (25 Aug 2008 21:59:38 UTC) Last edited by: Beate Pfau (08 Jul 2009 09:01:41 UTC) |
| Resource type: Journal Article BibTeX citation key: Winokur1975 View all bibliographic details  |
Categories: General Keywords: Emydidae, Fortpflanzung = reproduction, Geoemydidae, Gopherus, Histologie = histology, Manouria, Physiologie = physiology, Platysternidae, Schildkröten = turtles + tortoises, Testudinidae Creators: Legler, Winokur Collection: Journal of Morphology |
Views: 2/649
Views index: 9% Popularity index: 2.25% |
| Abstract |
|
Gopherus Manouria Testudinidae A survey of 69 of the 74 currently recognized chelonian genera revealed that 21 genera in three families (Emydidae, Platysternidae and Testudinidae) possess paired integumentary glands or gland vestiges in the anterior throat skin. These glands are here termed mental glands; they are holocrine and may be classified morphologically as follows: Class I mental glands are large, complex, multilobed, have specialized ducts, and are found only in the genus Gopherus: Class II mental glands are small, simple sacklike invaginations containing secretory cells or keratinizing cells. The structure of Class II glands varies from distinctive and saccular to shallow keratinized invaginations having no glandular tissue; they are found only in the families Platysternidae and Emydidae. Mental glands occur in 17 of the 22 genera in the subfamily Batagurinae (sensu McDowell, 64); only 2 of 9 genera in the subfamily Emydinae have these glands. The taxonomic occurrence of mental glands suggests that they are primitive structures. The loss of mental glands in most emydines is interpreted as a subfamilial trend toward integumentary simplification. Added by: Admin Last edited by: Beate Pfau |