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69 results for “hemipene”
FIGURE 1 in Hemipenial morphology in the North American snake genus Phyllorhynchus (Serpentes: Colubridae), with a review of and comparisons with natricid hemipenes
FIGURE 1. Everted hemipenis of Phyllorhynchus decurtatus (CAS 223608) in sulcate (left) and asulcate (right) views. A, detail of the divergent lips of the sulcus spermaticus, one lip passing to each lobe (CAS 223608); B, outer (lateral) surface of the right lobe showing the low ridges passing over the apical tip (CAS 178969).
FIGURE 4 in Hemipenial morphology in the North American snake genus Phyllorhynchus (Serpentes: Colubridae), with a review of and comparisons with natricid hemipenes
FIGURE 4. Everted hemipenes of natricids in sulcate view. A, Afronatrix anoscopus (CAS 230205). B, Amphiesma bitaeniatum (CAS 215037) (detail of apex shown in Fig. 5A). C, Natrix tessellata (CAS 183115) (detail of apex shown in Fig. 5D).
FIGURE 11 in Hemipenial morphology in the North American snake genus Phyllorhynchus (Serpentes: Colubridae), with a review of and comparisons with natricid hemipenes
FIGURE 11. Everted hemipenes of Salvadora in sulcate views. A, S. hexalepis (CAS 190805). B, S. grahamiae (CAS 190878). C, apical tip of S. hexalepis. D, apical tip of S. grahamiae. Arrows in C and D indicate the tip of the sulcus spermaticus.
FIGURE 3 in Hemipenial morphology in the North American snake genus Phyllorhynchus (Serpentes: Colubridae), with a review of and comparisons with natricid hemipenes
FIGURE 3. Everted hemipenes of Phyllorhynchus browni. A, "Morph I" (AMNH R-70704) in sulcate (left) and asulcate (right) views. The base of AMNH R-70704 is artificially narrowed because it was tied off during preservation; the sulcus lip on the right lobe is damaged near the base of the crotch. B, "Morph II" (CAS 160226) in sulcate and asulcate views.
FIGURE 10 in Hemipenial morphology in the North American snake genus Phyllorhynchus (Serpentes: Colubridae), with a review of and comparisons with natricid hemipenes
FIGURE 10. Details of natricid apical morphology. A, Rhabdophis tigrinus (CAS 166939) showing well developed calyces on the lobes. Although not clear in this photo, each calyx has a single spine protruding from its center. B, Xenochrophis cerasogaster (CAS 245195), right lobe showing pocket at the distal end of the nude area (shadowed paraboloid area). The nude area is on the sulcate face of the lobe (right lobe twisted laterally); compare Figs. 8C and 9A.
FIGURE 9 in Hemipenial morphology in the North American snake genus Phyllorhynchus (Serpentes: Colubridae), with a review of and comparisons with natricid hemipenes
FIGURE 9. Everted hemipenes of Xenochrophis in sulcate view. A, X. cerasogaster (CAS 245195) (detail of apex shown in Figs. 8C, 10B). B, X. flavipunctatus (CAS 210529). C, X. piscator (CAS 208428) (detail of apex shown in Fig. 8D). The right lobe in A is twisted to the right; the typical position is shown by the left lobe, in which the sulcus forms a broad nude area on the sulcate face of the lobe. A similar sulcus and lobe morphology is exhibited in C; again, the lobes are somewhat twisted. In B the sulcus spermaticus passes to the crotch between the lobes, where it divides and each branch passes centripetally up the medial face of its respective lobe.
FIGURE 7 in Hemipenial morphology in the North American snake genus Phyllorhynchus (Serpentes: Colubridae), with a review of and comparisons with natricid hemipenes
FIGURE 7. Everted hemipenes of Rhabdophis in sulcate view. A, R. nuchalis (CAS 242054) (detail of apex shown in Fig. 8A). B, R. subminiatus (CAS 206565) (detail of apex shown in Fig. 8B). C, R. tigrinus (CAS 166939). The sulcus spermaticus in A and C passes to the crotch, where it divides and each branch passes centripetally up the medial face of its respective lobe. In B the sulcus spermaticus passes to the edge of the crotch, divides, and each branch then passes toward the tip of its respective lobe in a position mainly on the sulcate face of the lobe.
FIGURE 8 in Hemipenial morphology in the North American snake genus Phyllorhynchus (Serpentes: Colubridae), with a review of and comparisons with natricid hemipenes
FIGURE 8. Details of apical morphology of Rhabdophis and Xenochrophis hemipenes. A, Rhabdophis nuchalis (CAS 242054), crotch and medial surface of the right lobe showing broad sulcus groove within a nude expanse. B, Rhabdophis subminiatus (CAS 206565), tip of the right lobe showing divergence of the sulcus lips to form a small nude area. C, Xenochrophis cerasogaster (CAS 245195), left lobe, sulcate surface showing expansion of the sulcus spermaticus to form a nude surface. D, Xenochrophis piscator (CAS 208428), sulcate surface of the right lobe showing divergence of the sulcus lips to form a nude strip covering virtually the entire sulcate surface of the narrow part ("nipple") of the lobe (the nipple is somewhat twisted). Arrow indicates the point at which the sulcus lips diverge.
FIGURE 6 in Hemipenial morphology in the North American snake genus Phyllorhynchus (Serpentes: Colubridae), with a review of and comparisons with natricid hemipenes
FIGURE 6. Everted hemipenis of Nerodia erythrogaster (CAS 237700). A, sulcate view of the organ. B, detail of the point at which the sulcus reaches the nude apex showing the diamond-shaped basin bordered by ridges.
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