Английская Википедия:Globampyx

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Шаблон:Short description Шаблон:Automatic taxobox

Globampyx is an extinct genus raphiophorid trilobites. It lived during the later part of the Arenig stage of the Ordovician Period,[1] approximately 478 to 471 million years ago.[1] Species of the genus are known from Canada (southeastern British Columbia), Norway (Svalbard) and Sweden.

Distribution

  • G. sinalae is known from the Middle Ordovician of Canada (Orthidiella brachiopod zone, Glenogle Shales Formation, North White River Section, British Columbia, 471.8-468.1 Ma)
  • G. trinucleoides is known from the Middle Ordovician of Svalbard (Psephosthenaspis microspinosa small shelly zone, Olenidsletta Member, Valhallfonna Formation, Ny friesland, 471.8-457.5 Ma)

Description

The headshield (or cephalon) of Globampyx is densely covered with very small granules. The central raised area of the cephalon (or glabella) has an inverted flask-shape. It lacks the rapier-like glabellar spine of many other raphiophorids, but only has a tubercle. The thorax has five segments. The short but wide triangular pygidium, with a rather low axis (or rhachis) of up to six indistinct rings that reaches the faint border furrow.[2]

References

Шаблон:Reflist

Шаблон:Taxonbar


Шаблон:Asaphida-stub Шаблон:Svalbard-stub