Phenoscape Knowledgebase (BETA): basioccipital

entity term: basioccipital

Properties

ID: TAO:0000472

Ontology: Teleost Anatomy

Synonyms: None

Definition: Chondral bone that articulates with the exoccipitals dorsally, the prootics anteriorly, the parasphenoid ventrally, and the first free vertebra posteriorly. The basioccipital forms the floor of the foramen magnum. The basioccipital is an unpaired medial bone.

Comment: In some teleosts the anterior vertebral centra fuse to the basioccipital forming a monopartite occipital condyle.

Relationships (about)

is a type of: endochondral bone

develops from: parachordal cartilage

overlaps: basioccipital-exoccipital joint, neurocranium, parasphenoid-basioccipital joint

is part of: chondrocranium, occipital region

may have part: basioccipital posterodorsal region

More information

View at NCBO Bioportal

Phenotypes: basioccipital

This table lists phenotypes, categorized by type of quality, which inhere in basioccipital, its subtypes, or parts.

Entity	Quality	Taxa
basioccipital	shape	100
basioccipital	relational structural quality : relational structural quality towards Weberian vertebra	285
basioccipital	structure	174
lateral region of basioccipital	size : decreased size, increased size	98
process of basioccipital	structure	65
process of basioccipital	relational structural quality : relational structural quality towards Weberian complex centrum, relational structural quality towards Weberian vertebra, relational structural quality towards centrum 1	209
process of basioccipital	shape : concave, flat, ovate, triangular and 1 more	233
process of basioccipital	count : absent, present	205
process of basioccipital	size : decreased size, decreased width, increased length	233
process of lateral region of basioccipital	relational structural quality : relational structural quality towards transcapular ligament	65
process of lateral region of basioccipital	count : present	65
process of ventral surface of basioccipital	size	34

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entity term: basioccipital

Properties

Relationships (about)

More information

Phenotypes: basioccipital