Results for “ventral”

ectopterygoid

A membrane, paired, bone in the upper jaw, located ventrally on the skull. Some fishes, such as serrasalmids, possess small tooth-like projections known as ectopterygoid teeth on this bone.

Used in 4 profiles

inferior mouth

Mouth located on the ventral surface of the head and oriented downwards.

Used in 7 profiles

keel

Ridgelike structure located on the ventral surface, caudal peduncle or caudal fin base in certain fishes.

Used in 35 profiles

postoral pouch

A transverse, hollow, pouch-like structure opening anteriorly and located on the ventral surface, immediately posterior to the mouth, in some members of certain balitorid genera, e.g., Gastromyzon, Neogastromyzon.

Used in 13 profiles

principle caudal-fin rays

Fin rays forming the dorsal or ventral margins of the caudal fin, supported by the supported by the hypural and parahypural.

Used in 1 profile

scapula

Paired bone attached to the pterygials, actinosts or radials of the pectoral fin. Articulates ventrally with the coracoid and anteriorly with the cleithrum.

subterminal mouth

Mouth oriented and opening primarily forward but also somewhat ventrally, i.e., the upper jaw and snout clearly extend beyond the lower jaw

Used in 8 profiles

ventrolateral

Positioned or orientated between the ventral and lateral surfaces.

Used in 4 profiles

yolk sac

A membranous sac containing yolk attached to the ventral surface of embryos and early larvae in some fishes. Retained for a period post-hatching in those species which form yolk sac larvae.

Used in 221 profiles

yolk sac larva

Post-hatching larval stage occurring in many fish species whereby the yolk sac remains attached to the ventral surface for a period. The larva does not feed normally until the yolk is fully-absorbed.

depressed

Vertically or dorsoventrally flattened.

Used in 51 profiles

paired fins

The pectoral and pelvic/ventral fins, both of which occur in pairs and are analogous to the fore and hind limbs in higher animals.

Used in 58 profiles