New cranial characters in the tribe <i>Hydropsini</i> (Serpentes: Dipsadidae: Xenodontinae)

We here describe the skull in four species of the three genera of the tribe Hydropsini (Serpentes: Dipsadidae: Xenodontinae): Helicops infrataeniatus, H. leopardinus, Hydrops caesurus and Pseudoeryx plicatilis. We compare them with several genera of Dipsadidae. We found that the unpaired foramen on...

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Detalles Bibliográficos
Autores principales: Di Pietro, Diego Omar, Alcalde, Leandro, Williams, Jorge Daniel
Formato: Articulo
Lenguaje:Inglés
Publicado: 2014
Materias:
Ciencias Naturales
Cranial osteology
Serpentes
Hydropsini
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/102831
https://ri.conicet.gov.ar/11336/22227
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-102831
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Naturales
Cranial osteology
Serpentes
Hydropsini
spellingShingle Ciencias Naturales
Cranial osteology
Serpentes
Hydropsini
Di Pietro, Diego Omar
Alcalde, Leandro
Williams, Jorge Daniel
New cranial characters in the tribe <i>Hydropsini</i> (Serpentes: Dipsadidae: Xenodontinae)
topic_facet Ciencias Naturales
Cranial osteology
Serpentes
Hydropsini
description We here describe the skull in four species of the three genera of the tribe Hydropsini (Serpentes: Dipsadidae: Xenodontinae): Helicops infrataeniatus, H. leopardinus, Hydrops caesurus and Pseudoeryx plicatilis. We compare them with several genera of Dipsadidae. We found that the unpaired foramen on the parabasisphenoid with anterior position is the only skull feature shared by all Hydropsini genera. This feature also occurs in semi-aquatic (Erythrolamphrus semiaureus) and fully-aquatic (Farancia abacura) dipsadids. All species of Hydrops with available skull descriptions and Pseudoeryx plicatilis share four features: (1) The anterior border of the angular is higher than the posterior border of the splenial, (2) the vomerine processes of the premaxilla are long, (3) the ascending process of the premaxilla overlaps the horizontal lamina of the nasals, and (4) an anterior projection of the prefrontal is present. All species of Helicops with available skull descriptions and Pseudoeryx plicatilis share three features: (1) A vertical lamina of the nasal with a notch, (2) a single foramen rotundum, and (3) the presence of a ventral projection of the transverse crista of the basioccipital. Finally, we found small, paired parietal foramina in most of the dipsadids studied here, which are filled with a Sudan-Black-positive tissue of possible nervous origin.
format Articulo
Articulo
author Di Pietro, Diego Omar
Alcalde, Leandro
Williams, Jorge Daniel
author_facet Di Pietro, Diego Omar
Alcalde, Leandro
Williams, Jorge Daniel
author_sort Di Pietro, Diego Omar
title New cranial characters in the tribe <i>Hydropsini</i> (Serpentes: Dipsadidae: Xenodontinae)
title_short New cranial characters in the tribe <i>Hydropsini</i> (Serpentes: Dipsadidae: Xenodontinae)
title_full New cranial characters in the tribe <i>Hydropsini</i> (Serpentes: Dipsadidae: Xenodontinae)
title_fullStr New cranial characters in the tribe <i>Hydropsini</i> (Serpentes: Dipsadidae: Xenodontinae)
title_full_unstemmed New cranial characters in the tribe <i>Hydropsini</i> (Serpentes: Dipsadidae: Xenodontinae)
title_sort new cranial characters in the tribe <i>hydropsini</i> (serpentes: dipsadidae: xenodontinae)
publishDate 2014
url http://sedici.unlp.edu.ar/handle/10915/102831
https://ri.conicet.gov.ar/11336/22227
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AT williamsjorgedaniel newcranialcharactersinthetribeihydropsiniiserpentesdipsadidaexenodontinae
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