exoccipital


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Related to exoccipital: parietal bone, occipital protuberance

exoccipital

[¦eks·äk′sip·əd·əl]
(anatomy)
Lying to the side of the foramen magnum, as the exoccipital bone.
References in periodicals archive ?
The basisphenoid and the basioccipital begin the ossification process in stage 19, followed by the supraoccipital and the opisthotic in stage 20 and the exoccipital in stage 21 (Figure 3E).
The opisthotic approaches the exoccipital and the squamosal and proceeds in the direction of the prooptic, also in this stage.
Ontogeny of the cranial bones of the giant amazon river turtle Podocnemis expansa Schweigger, 1812 (Testudines, Podocnemididae)/ Ontogenia dos ossos do cranio em tartaruga-da-amazonia Podocnemis expansa Schweigger, 1812 (Testudines, Podocnemididae)
Occipito-vertebral articulation formed by spherical basioccipital condyle and paired small, separate exoccipital condyles.
Descriptive anatomy of Iso rhothophilus (Ogilby), with a phylogenetic analysis of Iso and a redefinition of Isonidae (Atheriniformes)
Within the skeletal system there are three major sets of bones involved in the majority of shifts in relative timing: (1) the membrane bones of the face, specifically, the premaxilla, maxilla, and dentary; (2) other, primarily membranous, bones of the calvaria; and (3) the exoccipital.
Within the ossification of cranial bones, only one element exhibits a major difference in its relative place in the developmental sequence: in marsupials, the exoccipital begins ossification relatively early.
Comparative patterns of craniofacial development in Eutherian and Metatherian mammals
El escamoso forma el techo del oido externo, resultando visibles lateralmente las suturas con el exoccipital y el cuadrado.
Nuevo genero de Crocodylia del eoceno medio de la peninsula Iberica (Zamora, Espana): Duerosuchus piscator nov. gen., nov. sp
The exoccipital is a small bone situated laterally to the basioccipital and ventrally to the epioccipital.
Osteology and myology of the cephalic region and pectoral girdle of Pangasius macronema, with a discussion on the synapomorphies and phylogenetic relationships of the Pangasiidae (Teleostei: Siluriformes)/ Osteologia y miologia de la region cefalica y de la cintura pectoral del Pangasius macronema, con una discusion de las sinapomorfias y relaciones filogeneticas de los Pangasiidae (Telostei; Siluriformes)
El arco del exoccipital se extiende internamente hacia la parte basal del supraoccipital, al cual se une por una banda de cartilago.
Una nueva especie ecuatoriana del genero de peces andinos Grundulus (Characiformes: Characidae)
The exoccipital, supraoccipital, ophisthotic (a cartilaginous bone that ossifies in the posterior half of the otic capsule, according to Gaffney, 1979) and squamosal bones are reduced.
A Taxonomic Reevaluation of Phrynops (Testudines: Chelidae) with the description of two new genera and a new species of Batrachemys
The well-developed exoccipitals are situated laterally to the basioccipital.
Osteology and myology of the cephalic region and pectoral girdle of Heptapterus mustelinus, comparison with other heptapterins, and discussion on the synapomorphies and phylogenetic relationships of the Heptapterinae and the Pimelodidae (Teleostei: Siluriformes)/Osteologia y miologia de la region cefalica y de la cintura pectoral del Heptapterus mustelinus, comparacion con otros heptapterinos ..
The frontoparietals do not bear crests and are not fused to the prootics or exoccipitals.
The relationships of an ensemble of guatemalan and mexican frogs (eleutherodactylus: leptodactylidae: amphibia)
Prootics and exoccipitals fused; entire posterior end of skull well ossified; optic foramina ventrally marginated by cartilage; oculomotor foramina marginated anteroventraly by cartilage; prootic and jugular foramina with bony margins; with small bony knob formed below epiotic eminences above occipital condyles.
A new species of Osteocephalus (Anura: Hylidae) from Guyana
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