Basic info | Taxonomic history | Classification | Included Taxa |
Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Arthroclema
Taxonomy
Arthroclema was named by Billings (1862). Its type is Arthroclema pulchellum.
It was assigned to Arthrostylidae by Bassler (1911), Bassler (1953) and Lobdell (1992); and to Cryptostomata by Sepkoski (2002).
It was assigned to Arthrostylidae by Bassler (1911), Bassler (1953) and Lobdell (1992); and to Cryptostomata by Sepkoski (2002).
Species
Synonymy list
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
G. †Arthroclema Billings 1862
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†Arthroclema armatum Ulrich 1890
†Arthroclema brevis Lobdell 1992
†Arthroclema pentagonalis Lobdell 1992
†Arthroclema pulchellum Billings 1862
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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Source: c = class, p = phylum, uc = unranked clade | |||||
References: Smith et al. 2006, Kiessling 2004, Nesnidal et al. 2013 |
Age range: base of the Middle Ordovician to the top of the Caradoc or 470.00000 to 449.50000 Ma
Collections (18 total)
Time interval | Ma | Country or state | Original ID and collection number |
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Volkhov | Estonia | A. armatum (167569) | |
Middle Ordovician | USA (New York) | A. sp. (334) | |
Sandbian | Argentina (San Juan) | A. sp. A (226179) | |
Caradoc | USA (Georgia) | A. armatum (32880 32881 32882 33065) | |
Blackriveran | USA (Tennessee) | A. striatum (5331) | |
Rocklandian | USA (Minnesota) | A. cornutum (219965) | |
Shermanian | USA (Minnesota) | A. armatum (167576 167611) | |
Chatfieldian | USA (New York) | A. sp. (433) | |
Richmondian | Canada (Manitoba) | A. pentagonalis (28023) | |
Richmondian | USA (North Dakota) | A. brevis, A. pentagonalis (64599 64602 64606) A. pentagonalis (64600 64604) |