Antiquatonia

Antiquatonia; Temporal range:
	Fossil from the Boggs Shale
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Brachiopoda
Class:	†Strophomenata
Order:	†Productida
Family:	†Productidae
Tribe:	†Retariini
Genus:	†Antiquatonia; Miloradovich, 1945
Species
	List A. blackwelderi (Gordon); A. coloradoensis (Girty); A. cooperi (Shi, 1990); A. costata (Sowerby, 1827); A. inflativentra (Cooper & Grant, 1975); A. insculpta (Muir-Wood, 1930); A. jemezensis (Harlow & Sutherland); A. pernodosa (Easton, 1962); A. portlockianus (Norwood & Pratten, 1855); A. posthindi (Solomina, 1970); A. reticulata (Cooper, 1957); ;

Antiquatonia is an extinct genus of brachiopod belonging to the order Productida and family Productidae. Specimens have been found in Carboniferous beds across many continents, suggesting the genus had a cosmopolitan distribution.[1] Species level taxonomy of Antiquatonia is in need of revision.[2]

Description

Like other members of Productinae, Antiquatonia had a deep corpus cavity, a geniculate profile with long trails, and well-developed marginal structures such as ear baffles. This genus had thick, halteroid ventral spines. The ears were flanked by a ridge of ventral spines, with complimentary internal lateral ridges.[1]

Classification

Muir-Wood & Cooper (1960) placed Antiquatonia in the subfamily Dictyoclostinae, though later analyses would find it to belong in Productinae instead. Leighton & Maples (2002) conducted multiple phylogenetic analyses which are strongly in agreement that Antiquatonia forms a clade with Diaphragmus and Spinocarinifera. The results of their phylogenetic analyses are displayed in the cladogram below:[2]

Productella

	Praewaagenoconcha

	Sentosia

Leioproductus

Spinocarinifera

	Diaphragmus

	Antiquatonia

	Flexaria

	Buxtonia

Pustula

Echinoconchus

Echinaria

	Pulchratia

	Parajuresania

References

Williams, A.; Carlson, S. J.; Brunton, C. H. C.; Holmer, L. E.; Popov, L. E.; Mergl, M.; Laurie, J. R.; Bassett, M. G.; Cocks, L. R. M.; Rong, J.-Y.; Lazarev, S. S.; Grant, R. E.; Racheboeuf, P. R.; Jin, Y.-G.; Wardlaw, B. R.; Harper, D. A. T.; Wright, A. D. (2000). "Part H Brachiopoda (revised) Volumes 2 & 3, Linguliformea, Craniiformea, Rhynchonelliformea (part)". Treatise on Invertebrate Paleontology. p. 472.
Leighton, Lindsey R.; Maples, Christopher G. (July 2002). "Evaluating internal versus external characters: Phylogenetic analyses of the Echinoconchidae, Buxtoniinae, and Juresaniinae (Phylum Brachiopoda)". Journal of Paleontology. 76 (4): 659. doi:10.1666/0022-3360(2002)076<0659:EIVECP>2.0.CO;2. ISSN 0022-3360.

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[WilliamsEtal2000-1] Williams, A.; Carlson, S. J.; Brunton, C. H. C.; Holmer, L. E.; Popov, L. E.; Mergl, M.; Laurie, J. R.; Bassett, M. G.; Cocks, L. R. M.; Rong, J.-Y.; Lazarev, S. S.; Grant, R. E.; Racheboeuf, P. R.; Jin, Y.-G.; Wardlaw, B. R.; Harper, D. A. T.; Wright, A. D. (2000). "Part H Brachiopoda (revised) Volumes 2 & 3, Linguliformea, Craniiformea, Rhynchonelliformea (part)". Treatise on Invertebrate Paleontology. p. 472.

[:0-2] Leighton, Lindsey R.; Maples, Christopher G. (July 2002). "Evaluating internal versus external characters: Phylogenetic analyses of the Echinoconchidae, Buxtoniinae, and Juresaniinae (Phylum Brachiopoda)". Journal of Paleontology. 76 (4): 659. doi:10.1666/0022-3360(2002)076<0659:EIVECP>2.0.CO;2. ISSN 0022-3360.