entoplastron


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entoplastron

[¦en·tō¦plas‚trän]
(vertebrate zoology)
The anterior median bony plate of the plastron of chelonians.
References in periodicals archive ?
(A-B) ROM-41848 left epiplastron in ventral view; (C-D) ROM-42183 entoplastron in ventral view; (E-F) ROM-42070 right epiplastron in ventral view; (G-H) ROM-42114 right hyoplastron in ventral view; (I-J) ROM-42102 right hypoplastron in ventral view; (K-L) ROM-42053 right xiphiplastron in ventral view; (M-N) ROM 42056 left xiphiplastron in ventral view; (O) plastron of extant Rhinoclemmys melanosterna CRI-4898 in ventral view.
The entoplastron is diamond shaped, with the posterior point slightly abbreviated.
Position of the entoplastron relative to the humeral-pectoral sulcus was miscoded by Coto and Acuna (1986) based on the incorrect reconstruction of Segura (1944).
The gulars of some specimens do not overlap the entoplastron (Fig.
The diagnosis for both Cuvierichelys and Landreatchelys proposed by Hervet (2004a) indicated that both taxa lacked well-developed keels in the carapace, but that they could have a poorly-developed posterior medial keel; moderately wide first vertebral, as wide as or wider than the nuchal plate; sub-straight or slightly curved lateral margins of the first vertebral scute; subtrapezoidal anterior plastral lobe, with rounded lateral margins; gulars not overlying the anterior region of the entoplastron, or showing a short overlap.
Plastron is cruciform, anterior plastron lobe much shorter than posterior; epiplastra and entoplastron reduced.
DESCRIPTION: Neural row reduced, neurals tetragonal; plastron cruziform, anterior plastral lobe slightly shorter than the posterior one; epiplastrals and entoplastron present.
The preserved elements, an entoplastron and a right epiplastron, preserve sufficiently diagnostic characteristics to permit species-level identification.
1a and 1b) is an entoplastron found in the 55-60 cm below-datum level of grid 1N 3E (details of the grid system were provided by Jass, 2007).
En Mexico, solo se conocen fosiles del genero Kinosternon que carece de entoplastron (Ernst & Barbour 1989), por lo que no es posible relacionar a los fosiles de San Buenaventura Nealtican con Kinosternidae.
Plastron plates: Epi = epiplastrons, Ento = entoplastron, Hyo = hyoplastrons, Hypo = hypolpastrons, Xiphi = xiphiplastrons.
En 1968 JIMENEZ, en su descripcion holotipica de Neochelys salmanticensis, cita como cotipo un entoplastron procedente de Corrales.