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8 results for “Amerotyphlops brongersmianus”
Figure 8 in Ontogeny of the skull of the blind snake Amerotyphlops brongersmianus (Serpentes: Typhlopidae) brings new insights on snake cranial evolution
Figure 8. Ratio between the length the bones of the gnathic complex and linear skull length plotted against postnatal ontogenetic stages of the anguimorph lizard Ophiodes intermedius, the blind snake Amerotyphlops brongersmianus and the alethinophidian snake Philodryas psammophidea. The successive postnatal ontogenetic stages were ordered according to SVL and named from 1 to 4 corresponding to hatching, juvenile, subadult and adult stages respectively.
Figure 6. A-B in Ontogeny of the skull of the blind snake Amerotyphlops brongersmianus (Serpentes: Typhlopidae) brings new insights on snake cranial evolution
Figure 6. A-B, internal (endocranial) view of the parabasisphenoid bone in Amerotyphlops brongersmianus throughout ontogeny showing the conformation of the Vidian canal: A, embryo at Stage 33; B, adult. C, endocranial view of the parabasisphenoid bone of the embryo of Liasis mackloti. D, frontal cutaway posterior to the hypophysial fenestra of embryo of A. brongersmianus at Stage 33 showing the cartilaginous nuclei of the trabeculae cranii. E-F, internal views of a sagittal cutaway of the skull of A. brongersmianus throughout ontogeny showing different endocranial apertures of the Vidian canal and presence of the lateral wing of the parabasisphenoid: E, embryo at Stage 33; F, adult. G, lateroventral view of the adult skull of A. brongersmianus showing external apertures of the Vidian canal. H-I, internal views of a sagittal cutaway of the skull of Candoia bibroni throughout ontogeny showing different endocranial apertures of the Vidian canal and the lateral wing of the parabasisphenoid: H, embryo; I, adult. J, lateroventral view of the adult skull of C. bibroni showing external apertures of the Vidian canal. Abbreviations: bo, basioccipital; cbc, cerebral carotid artery; ccf, cerebral carotid foramen; fr, frontal; lo, lateral ossification of the posterior trabecula; ot, otooccipital; p, parietal; pan, palatine nerve; par, palatine artery; pav, primary anterior opening of the Vidian canal; pbs; parabasisphenoid; po; prootic; pov, posterior opening of the Vidian canal; sav, secondary anterior opening of the Vidian canal; t, trabecula cranii; tc, trabecula communis; V, foramen for the maxillary and mandibular rami of the trigeminal nerve; V4, cid nerve; VIIp, palatine ramus of the facial nerve. Scale bars equal to 1 mm.
Figure 3 in Ontogeny of the skull of the blind snake Amerotyphlops brongersmianus (Serpentes: Typhlopidae) brings new insights on snake cranial evolution
Figure 3. Ventral view of the skull of Amerotyphlops brongersmianus throughout embryonic and postnatal ontogeny. Lower jaw as well as the maxilla, palatine and pterygoid on the left side were digitally removed: A, embryo at Stage 33; B, embryo at Stage 34; C, embryo at Stage 36; D, hatchling; E, juvenile; F, adult. Abbreviations: bo, basioccipital; cs, crista sellaris; et, egg tooth; fr, frontal; fv, fenestra vomeronasalis; hf, hypophysial fenestra; mx, maxilla; ot, otooccipital; p, parietal; pa, palatine; pbs, parabasisphenoid; pmx, premaxilla; po, prootic; pov, posterior opening of the Vidian canal; pfr, prefrontal; pt, pterygoid; q, quadrate; s, sulcus of the embryonic parabasisphenoid; sav, secondary anterior opening of the Vidian canal; set, scar of the egg tooth; smx, septomaxilla; ut, unossified trabecula; II, foramen for the optic nerve; V, foramen for maxillary and mandibular rami of the trigeminal nerve. Scale bars equal to 1 mm.
Figure 2 in Ontogeny of the skull of the blind snake Amerotyphlops brongersmianus (Serpentes: Typhlopidae) brings new insights on snake cranial evolution
Figure 2. Dorsal view of the skull of Amerotyphlops brongersmianus throughout embryonic and postnatal ontogeny: A, embryo at Stage 33; B, embryo at Stage 34; C, embryo at Stage 36; D, hatchling; E, juvenile; F, adult. Abbreviations: bo, basioccipital; fr, frontal; mx, maxilla; n, nasal; ot, otooccipital; p, parietal; pa, palatine; pbs; parabasisphenoid; pmx; premaxilla; po, prootic; pp, postorbital process; prf, prefrontal; q, quadrate; so, supraoccipital. Scale bars equal to 1 mm.
Figure 7 in Ontogeny of the skull of the blind snake Amerotyphlops brongersmianus (Serpentes: Typhlopidae) brings new insights on snake cranial evolution
Figure 7. Lateral and medial views of the lower jaw of Amerotyphlops brongersmianus throughout ontogeny: A, embryo at Stage 33; B, hatchling; C, adult. Abbreviations: a, angular; co, coronoid; cb, compound bone; d, dentary; gc, glenoid cavity; mf, mandibular fossa; rp, retroarticular process; sp, splenial. Scale bars equal to 1 mm.
Figure 1 in Ontogeny of the skull of the blind snake Amerotyphlops brongersmianus (Serpentes: Typhlopidae) brings new insights on snake cranial evolution
Figure 1. Lateral view of the skull of Amerotyphlops brongersmianus throughout embryonic and postnatal ontogeny: A, embryo at Stage 33; B, embryo at Stage 34; C, embryo at Stage 36; D, hatchling; E, juvenile; F, adult. Abbreviations: a, angular; bo, basioccipital; cb, compound bone; co, coronoid; d, dentary; et, egg tooth; fr, frontal; mx, maxilla; n, nasal; ot, otooccipital; p, parietal; pa, palatine; pbs, parabasisphenoid; pmx, premaxilla; po, prootic; pp, postorbital process; prf, prefrontal; pt, pterygoid; q, quadrate; smx, septomaxilla; so, supraoccipital; sp, splenial; II, foramen for the optic nerve; V, foramen for both rami of the trigeminal nerve. Scale bars equal to 1 mm.
Figure 4 in Ontogeny of the skull of the blind snake Amerotyphlops brongersmianus (Serpentes: Typhlopidae) brings new insights on snake cranial evolution
Figure 4. Lateral (left), anterior (centre) and ventral (right) views of the egg tooth of squamate embryos at equivalent pre-hatching stages: A, Lanthanotus borneensis; B, Amerotyphlops brongersmianus; C, Liasis mackloti; D, Naja oxiana. The premaxilla is highlighted in light grey. The ventral view is a horizontal cutaway showing the section of the egg tooth near its base. Scale bars equal to 1 mm.
Figure 5. A-C in Ontogeny of the skull of the blind snake Amerotyphlops brongersmianus (Serpentes: Typhlopidae) brings new insights on snake cranial evolution
Figure 5. A-C, posterolateral views of the otic region of Amerotyphlops brongersmianus throughout ontogeny: A, embryo at Stage 33; B, hatchling; C, adult. Black arrowheads indicate the suture between the exoccipital and opisthotic. D, endocranial view of the otic region in an embryo of A. brongersmianus at Stage 34 showing the crista interfenestralis concealing the crista tuberalis. E-F, endocranial and lateral views of the otic region of the embryo of Candoia bibroni showing the type 3 configuration of the crista circumfenestralis. G, lateral view of the otic region of the embryo of Naja oxiana showing the type 4 configuration of the crista circumfenestralis. Abbreviations: bo, basioccipital; ci, crista interfenestralis; cop, commissura praefacialis; cp, crista prootica; ct, crista tuberalis; ct+ci, fused crista tuberalis and crista interfenestralis; dp, descensus parietalis; jf, jugular foramen; ot, otooccipital; p, parietal; pbs, parabasisphenoid; po, prootic; pov, posterior opening of the Vidian canal; so, supraoccipital; st, stapes; V, foramen for the maxillary and mandibular rami of the trigeminal nerve; V2, foramen for the maxillary ramus of the trigeminal nerve; V3, foramen for the mandibular ramus of the trigeminal nerve; VII, foramen for the facial nerve. Scale bars equal to 1 mm.
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