Hyloplesion

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Hyloplesion
Temporal range: Late Carboniferous
↓
Scientific classification
Kingdom:
Animalia
Phylum:
Chordata
Class:
Amphibia
Subclass:
Lepospondyli
Order:
Microsauria
Suborder:
Microbrachomorpha
Family:
Hyloplesiontidae

Carroll and Gaskill, 1978
Genus:
Hyloplesion

Fritsch
, 1883
Species
  • H. longicostatum (Fritsch, 1875 [originally Stelliosaurus longicostatus]) (type)

Hyloplesion is an extinct

Middle Pennsylvanian. The type species is H. longicostatum, named in 1883. Two species belonging to different genera, Seeleya pusilla and Orthocosta microscopica, have been synonymized with H. longicostatum and are thought to represent very immature individuals.[1]

Description

Antonin Fritsch
.

Hyloplesion was about as large as a medium-sized salamander, with the length of known specimens ranging from 17-77mm.[2]

The skull is triangular in shape. Unlike many other microsaurs, the palate of Hyloplesion contains large vacuities, or openings.

Romeria in lateral view due to similarities in the pattern of the dermal bones and the hooked shape of the premaxilla. However, the skull differs from that of Romeria in dorsal view, as the parietals are much wider in Hyloplesion.[1]

The

tridactyly.[1]

Paleobiology

A range of morphological characteristics makes it difficult to determine whether Hyloplesion was primarily terrestrial or aquatic.

lateral-line
canals in the skull, although they were most likely present, separated from the skull by a layer of connective tissue.

References

  1. ^ a b c d e Carroll, R. L.; Gaskill, P. (1978). "The Order Microsauria". Memoirs of the American Philosophical Society. 126: 1–211.
  2. doi:10.1080/02724634.1991.10011390
    .
  3. doi:10.1093/icb/5.2.287
    .

External links
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