Globampyx

Globampyx
Temporal range: Late Arenig[1]
G. trinucleoides
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Trilobita
Order: Asaphida
Suborder: Trinucleina
Family: Raphiophoridae
Genus: Globampyx
Species
  • G. trinucleoides Fortey, 1975 (type)
  • G. obtusus (Moberg & Segerberg, 1906) synonym Ampyx obtusus
  • G. linnarssoni (Schmidt, 1894) synonym Ampyx linnarssoni
  • G. sinalae Norford & Ross, 1978

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. Species of the genus are known from Canada (southeastern British Columbia), Norway (Svalbard) and Sweden.

Distribution

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

  1. 1 2 Sepkoski, Jack (2002). "A compendium of fossil marine animal genera (Trilobita entry)". Bulletins of American Paleontology 364: 560. Retrieved 2008-01-12.
  2. Fortey, R.A. (1975). The Ordovician Trilobites of Spitsbergen [II. Asaphidae, Nileidae, Raphiophoridae and Telephinidae of the Valhallfonna Formation]. Norsk Polarinstitutt Skrifter 162. Oslo: Norsk Polarinstitutt.


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