ceratodus

/suh-rat-uh-duhs, ser-uh-toh-duhs/US // səˈræt ə dəs, ˌsɛr əˈtoʊ dəs //UK // (sɪˈrætədəs, ˌsɛrəˈtəʊdəs) //

大理石,卫星

Definitions

n.名词 noun

1
plural ce·rat·o·dus·es.
- : a lungfish of either of two genera, Neoceratodus and the extinct Ceratodus, having hornlike ridges on the teeth.

His purpose was the study of the wonderful Australian fauna, the oviparous mammals, marsupials, and ceratodus (lungfish).
Six pairs of branchial arches occur in Protopterus; Ceratodus and Lepidosiren have five, like most other fish.
The teeth of the extinct Dipteridae resemble those of Ceratodus but are more complicated.
However, teeth are found in the Trias which resemble those of the living Ceratodus.
No; but from an organ similar in character and position to the air-bladder of a ceratodus, or a lepidosiren.