Globampyx is an extinctgenusraphiophoridtrilobites. 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.
G. obtusus (Moberg & Segerberg, 1906) synonymAmpyx obtusus
G. linnarssoni (Schmidt, 1894) synonym Ampyx linnarssoni
G. sinalae Norford & Ross, 1978
Distributionedit
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)
Descriptionedit
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]
Referencesedit
^ abSepkoski, Jack (2002). . Bulletins of American Paleontology. 364: 560. Archived from the original on September 5, 2006. Retrieved 2008-01-12.
^Fortey, R.A. (1975). The Ordovician Trilobites of Spitsbergen [II. Asaphidae, Nileidae, Raphiophoridae and Telephinidae of the Valhallfonna Formation]. Norsk Polarinstitutt Skrifter. Vol. 162. Oslo: Norsk Polarinstitutt.
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globampyx, extinct, genus, raphiophorid, trilobites, lived, during, later, part, arenig, stage, ordovician, period, approximately, million, years, species, genus, known, from, canada, southeastern, british, columbia, norway, svalbard, sweden, temporal, range, . 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 GlobampyxTemporal range Late Arenig PreꞒ Ꞓ O S D C P T J K Pg N G trinucleoides Scientific classification Domain Eukaryota Kingdom Animalia Phylum Arthropoda Class Trilobita Order Asaphida Family Raphiophoridae Genus GlobampyxFortey 1975 Species G trinucleoides Fortey 1975 type G obtusus Moberg amp Segerberg 1906 synonym Ampyx obtusus G linnarssoni Schmidt 1894 synonym Ampyx linnarssoni G sinalae Norford amp Ross 1978Distribution editG 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 editThe 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 edit a b Sepkoski Jack 2002 A compendium of fossil marine animal genera Trilobita entry Bulletins of American Paleontology 364 560 Archived from the original on September 5 2006 Retrieved 2008 01 12 Fortey R A 1975 The Ordovician Trilobites of Spitsbergen II Asaphidae Nileidae Raphiophoridae and Telephinidae of the Valhallfonna Formation Norsk Polarinstitutt Skrifter Vol 162 Oslo Norsk Polarinstitutt nbsp This Asaphida related article is a stub You can help Wikipedia by expanding it vte nbsp This Svalbard related article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Globampyx amp oldid 1020408809, wikipedia, wiki, book, books, library,
