Echinoconchus
Temporal range:
Fossils of Echinoconchus (13-26) along with other brachiopods
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Brachiopoda
Class: †Strophomenata
Order: †Productida
Family: †Echinoconchidae
Tribe: †Echinoconchini
Genus: †Echinoconchus
Weller, 1914

Echinoconchus is an extinct genus of brachiopods which lived during the Lower Carboniferous period. The genus was abundant and had a cosmopolitan distribution.[1]

Description

Like other echinoconchids, Echinoconchus had thin, recumbent spines arranged in concentric bands on both valves, as well as a corpus with a planoconvex profile and deep cavity. This genus had a transversely subcircular outline, weakly concave dorsal valve and short dorsal trail. Ridges supporting the narrow cardinal process are present, as well as elongated, mildly anteriorly-raised adductor muscle scars.[1]

Classification

Leighton & Maples (2002) conducted multiple phylogenetic analyses which are strongly in agreement that the four subfamilies Buxtoniinae, Echinoconchinae, Pustulinae and Juresaniinae form the family Echinoconchidae. The cladogram 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

  1. 1 2 Williams, Alwyn (2000). Part H Brachiopoda (revised): Volumes 2 & 3, Linguliformea, Craniiformea, Rhynchonelliformea (part)., Treatise on Invertebrate Paleontology. Geological Society of America. p. 509.
  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.
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