Myalina

Myalina

▪ extinct clam genus
      extinct genus of clams found in rocks of Early Carboniferous to Late Permian age (dating from 360 to 245 million years ago). Myalina belongs to an ancient group of clams, the Mytilacea, that first appeared in the earlier Ordovician Period (beginning 505 million years ago). Myalina had a thicker shell than other mytilacids. Myalina, abundant in many rock formations, is important for stratigraphic correlations.

* * *


Universalium. 2010.

Нужна курсовая?

Look at other dictionaries:

  • clam — clam1 clamlike, adj. clammer, n. /klam/, n., v., clammed, clamming. n. 1. any of various bivalve mollusks, esp. certain edible species. Cf. quahog, soft shell clam. 2. Informal. a secretive or silent person. 3 …   Universalium

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”