The biology of the amphibia (1931) (19761338963)

Title: The biology of the amphibia

Identifier: biologyofamphibi00nobl (find matches)

Year: 1931 (1930s)

Authors: Noble, Gladwyn Kingsley, 1894-1940

Subjects: Amphibians

Publisher: New York : McGraw-Hill

Contributing Library: ASC - York University Libraries

Digitizing Sponsor: York University - University of Toronto Libraries

Text Appearing Before Image:

SEX AND SECONDARY SEX CHARACTERS 123 it has recently been shown that the males of some and possibly all species of Eurycea hypertrophy the teeth in both jaws from short bicuspid teeth, characteristic of most metamorphosed Amphibia, to elongate monocuspid ones (Fig. 45). It had Pr.Fr. Sph. Fr.

Text Appearing After Image:

Fig. 45.—Secondary sex differences in the skull, especially in the teeth, of the two-lined salamander Eurycea bislineata bislineata. A. Female. B. Male. Devi,., dentary; Fr., frontal; Mx., maxillary; Na., nasal; Op., operculum; Par., parietal; Per., periotic; Pmx., premaxillary; Pr.Art., prearticular; Pr.Fr., pre- frontal; Pt., pterygoid vestige; Qu., quadrate; Sept., septomaxilla; Sph., sphe- nethmoid; Sq. squamosal. previously been pointed out that the males of most plethodontids have the premaxillary teeth elongate, monocuspid, and directed more or less forward (Fig. 46). A possible use for the latter modification was found in courtship of Eurycea bislineata (Noble, 1929) where during the initial stage the male rubs the female

caudata skulls eurycea anatomy eurycea bislineata images from the clara thomas archives and special collections the biology of the amphibia 1931 high resolution biology amphibia zoological illustration diagram book illustrations copyright free medical images canada

1931

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