hypoplastron


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hypoplastron

[¦hī·pō¦plas·trən]
(vertebrate zoology)
Either of the third pair of lateral bony plates in the plastron of most turtles.
References in periodicals archive ?
The hypoplastron of Emydoidea blandingii is easily distinguished from those of other North American emydid turtles of similar size on the basis of the following characteristics: 1) abdominal-pectoral sulcus joins hyo-hypoplastral suture at midline; 2) humeral-pectoral sulcus placed far anteriorly; 3) angular epi-hypoplastral suture; 4) bridge buttress limited in its anterior extent; and 5) posterior edge of bone lateral to bridge buttress bevelled for hypoplastral hinge attachment.
MMS 4287 segunda placa periferica izquierda; MMS 3879 xifiplastron derecho incompleto; MMS 3880 tercera placa periferica izquierda; 3881 placa pleural indeterminada; MMS 3883 xifiplastron derecho; MMS 3884 placa pleural posterior derecha; MMS 892 octava placa periferica izquierda; MMS quinta placa periferica derecha; MMS 1264 fragmento de hypoplastron derecho; MMS 3718 primera placa pleural derecha; MMS 3719 decima placa periferica izquierda.
Plastron plates: epiplastrals = epi, entoplastron = ento, hyoplastron = hyo, hypoplastron = hypo, xiphiplastron = xiphi.
04, three hyo or hypoplastron remains from the bridge region; PMUL HS 387a-c-A10.
Description of holotype: Most parts of the posterior carapace area including neurals IV to VIII, pleurals III to VIII, right free costae III to VIII, left free costae V to VIII, right peripheral edge, single parts of left peripherals, left pubis, left coracoid and the right lateral wings of hyoplastron and hypoplastron.