Siphonotretida

Superregnum: Eukaryota
Regnum: Animalia
Phylum: Brachiopoda
Subphylum: Linguliformea
Classis: Lingulata
Ordo: †Siphonotretida
Superfamilia: †Siphonotretoidea
Genera: Oaxaquiatreta
References

Streng, M. et al. 2011: Linguliform brachiopods from the Terminal Cambrian and Lowest Ordovician of the Oaxaquia Microcontinent (Southern Mexico). Journal of paleontology, 85(1): 122–155. DOI: 10.1666/10-074.1

Siphonotretida is an extinct order of Brachiopoda, comprising the sole superfamily Siphonotretoidea, itself containing the sole family Siphonotretidae.[1] They are thought to be most closely related to the Lingulellotretidae or dysoristids.[2]
Genera

Acanthambonia Cooper, 1956
?Acanthotretella Holmer & Caron, 2006 (provisionally assigned to Siphonotretida, Siphonotretoidea)
Alichovia Goryanskij, 1969
Celdobolus Havlíček, 1982
Cyrbasiotreta Williams & Curry, 1985
Eosiphonotreta Havlíček, 1982
Gorchakovia Popov & Khazanovitch (in Popov et al., 1989)
Helmersenia Pander (in von Helmersen, 1861)
Karnotreta Williams & Curry, 1985
Mesotreta Kutorga, 1848
Multispinula Rowell, 1962
Nushbiella Popov (in Kolobova & Popov, 1986)
Oaxaquiatreta Streng, Mellbin, Landing & Keppie, 2011[3]
Orbaspina Valentine & Brock, 2003
?Quasithambonia Bednarczyk & Biernat, 1978
Schizambon Walcott, 1884
Siphonobolus Havlíček, 1982
Siphonotreta de Verneuil, 1845
Siphonotretella Popov & Holmer, 1994

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. And Wright, A. D. 2000. Part H, Brachiopoda. Linguliformea, Craniiformea, and Rhynchonelliformea. Geological Society of America
Valentine, James L.; Brock, Glenn (2003). "A new siphonotretid brachiopod from the Silurian of central-western New South Wales, Australia" (PDF). Records of the Australian Museum. 55 (2): 231–244. doi:10.3853/j.0067-1975.55.2003.1378.
Streng, Michael; Mellbin, Barbro B.; Landing, Ed; Keppie, J. Duncan (2011). "Linguliform brachiopods from the terminal Cambrian and lowest Ordovician of the Oaxaquia microcontinent (Southern Mexico)". Journal of Paleontology. 85 (1): 122–155. doi:10.1666/10-074.1.