A Silurian trilobite fauna dominated by Calymene from Kap Tyson, western North Greenland

P.D Lane,D.J Siveter

doi:10.34194/rapggu.v150.8135

Abstract

The Silurian trilobites described here are referred to 5 genera and 5 species-level taxa of which Calymene iladon is new. The composition of the fauna is unusual for North Greenland in that it is overwhelmingly dominated by specimens of Calymene. Other elements of the fauna are known from other areas of North Greenland, and at least closely related forms of one of them have cosmopolitan distributions.

Highlights

The Silurian trilobites described here are referred to 5 genera and 5 species-level taxa of which Calymene iladon is new
The trilobites described in this paper were collected in western North Greenland by M
A single fragmentary cranidium is best referred to Bumastus. It displays a sculpture of densely-spaced small pits like that of material from the Wenlock of Kronprins Christian Land, eastern North Greenland referred to 'goldillaenid gen. et sp. indet. 2' by Lane (1972, p. 347, pI. 62, fig. 14) it displays the characteristic broadly oval, exsagittally elongate Ig glabellar muscle impression placed at about 150% of its own length from the posterior cranidial border shown by species of the genus (Lane & Thomas, 1978, pI. 1, fig. 5)

Summary

Systematic descriptions

Wenlock Series, Silurian; West Midlands, U.K. Bumastus Sp. Wenlock Series, Silurian; West Midlands, U.K. Figured material. MGUH 19510 (fragmentary cranidium from GGU 301925). A single fragmentary cranidium is best referred to Bumastus. It displays a sculpture of densely-spaced small pits like that of material from the Wenlock of Kronprins Christian Land, eastern North Greenland referred to 'goldillaenid gen. 14) it displays the characteristic broadly oval, exsagittally elongate Ig glabellar muscle impression placed at about 150% of its own length from the posterior cranidial border shown by species of the genus Type and figured specimens (MGUH prefix) are deposited in the Geological Museum, Copenhagen. MGUH 19511 (fragmentary cranifrom the Barr Limestone Member of the Coalbrookdale dium from GGU 301925)

NYEBOE LAND

Findings

Discussion