Ozarkodinida

 Pa element of Pterospathodus amorphognathoides lithuanicus, copyright Valdek Mikli.

Belongs within: Prioniodontida.
Contains: Spathognathodontidae.

The Ozarkodinida are a major group of conodonts that have P elements that are carminate and angulate, and that lack digyrate or pastinate elements (Sweet & Donoghue 2001). The P elements are also the primary means of identifying taxa within the group. The apparatus is otherwise sexi- or septimembrate, with the S and M elements being generalised in form and varying little between species (Sweet 1988).

The earliest ozarkodinidans include the Silurian Pterospathodontidae which possess stelliscaphate or pectiniscaphate pectiniform elements (Sweet 1988).

<==Ozarkodinida
    |  i. s.: Synclydagnathus Rexroad & Varker 1992 [=Syncladognathus (l. c.)]D02
    |--PterospathodontidaeSD01
    |    |  i. s.: Carniodus Walliser 1964S88
    |    |           `--C. carnulus Walliser 1964AS93
    |    |         Pranognathus Männik & Aldridge 1989AS93
    |    |           |--P. siluricus (Pollock et al. 1971)AS93
    |    |           `--P. tenuis (Aldridge 1972)M02
    |    |         Huddlella Mashkova 1979AS93
    |    |           `--H. johni Mashkova 1979AS93
    |    |--+--Astropentagnathus Mostler 1967S88
    |    |  |    `--A. irregularisS88
    |    |  `--Apsidognathus Walliser 1964S88
    |    |       |--A. ruginosusMS12
    |    |       `--A. tuberculatus Walliser 1964MS12
    |    `--Pterospathodus Walliser 1964S88
    |         |--P. amorphognathoides Walliser 1964AS93
    |         |    |--P. a. amorphognathoidesM02
    |         |    |--P. a. angulatusM02
    |         |    |--P. a. lennartiM02
    |         |    `--P. a. lithuanicusM02
    |         |--P. celloniM02
    |         |--P. eopennatusM02
    |         |--P. latusMS12
    |         |--P. pennatus (Walliser 1964)M02
    |         |    |--P. p. pennatusS88
    |         |    `--P. p. procerusS88
    |         `--P. rhodesiMS12
    `--+--SpathognathodontidaeSD01
       `--KockelellidaeSD01
            |--Tuxekania Savage 1985AS93
            |--Ancoradella Walliser 1964S88
            |    `--A. ploeckensisS88
            |--Aulacognathus Mostler 1967AS93
            |    |--A. bullatusS88
            |    |--A. chapiniMS12
            |    `--A. kuehniS88
            |--Ctenognathodus Fay 1959AS93, M62 [=Ctenognathus Pander 1856 non Fairmaire 1843M62]
            |    |--*C. murchisoni (Pander 1856)M62 [=*Ctenognathus murchisoniM62, Spathognathodus murchisoniH62]
            |    |--C. confluensJT12
            |    `--C. pseudofissilis Lindström 1959AS93 [=Ctenognathus pseudofissilisS88]
            `--Kockelella Walliser 1957S88
                 |--*K. variabilis Walliser 1957H62
                 |    |--K. v. variabilisJT12
                 |    `--K. v. ichnusaeJT12
                 |--K. abruptaS88
                 |--K. absidataS88
                 |--K. amsdeniS88
                 |--K. maennikiJT12
                 |--K. manitoulinensis (Pollock et al. 1971)AS93
                 |--K. ortus (Walliser 1964)M02
                 |--K. patulaS88
                 |--K. ranuliformisS88
                 |--K. sardoaJT12
                 |--K. staurosS88
                 `--K. walliseriS88

*Type species of generic name indicated

References

[AS93] Aldridge, R. J., & M. P. Smith. 1993. Conodonta. In: Benton, M. J. (ed.) The Fossil Record 2 pp. 563–572. Chapman & Hall: London.

[D02] Dzik, J. 2002. Emergence and collapse of the Frasnian conodont and ammonoid communities in the Holy Cross Mountains, Poland. Acta Palaeontologica Polonica 47: 565–650.

[H62] Hass, W. H. 1962. Conodonts. In: Moore, R. C. (ed.) Treatise on Invertebrate Paleontology pt W. Miscellanea: Conodonts, Conoidal Shells of Uncertain Affinities, Worms, Trace Fossils and Problematica pp. W3–W69. Geological Society of America, and University of Kansas Press.

[JT12] Jeppsson, L., J. A. Talent, R. Mawson, A. Andrew, C. Corradini, A. J. Simpson, J. Wigforss-Lange & H. P. Schönlaub. 2012. Late Ludfordian correlations and the Lau Event. In: Talent, J. A. (ed.) Earth and Life: Global biodiversity, extinction intervals and biogeographic perturbations through time pp. 653–675. Springer.

[M02] Männik, P. 2002. Conodonts in the Silurian of Severnaya Zemlya and Sedov archipelagos (Russia), with special reference to the genus Ozarkodina Branson & Mehl, 1933. Geodiversitas 24 (1): 77–97.

[MS12] Molloy, P. D., & A. J. Simpson. 2012. An analysis of the Ireviken Event in the Boree Creek Formation, New South Wales, Australia. In: Talent, J. A. (ed.) Earth and Life: Global biodiversity, extinction intervals and biogeographic perturbations through time pp. 615–630. Springer.

[M62] Müller, K. J. 1962. Supplement to systematics of conodonts. In: Moore, R. C. (ed.) Treatise on Invertebrate Paleontology pt W. Miscellanea: Conodonts, Conoidal Shells of Uncertain Affinities, Worms, Trace Fossils and Problematica pp. W246–W249. Geological Society of America, and University of Kansas Press.

[S88] Sweet, W. C. 1988. The Conodonta: Morphology, taxonomy, paleoecology, and evolutionary history of a long extinct animal phylum. Clarendon Press: Oxford.

[SD01] Sweet, W. C., & P. C. J. Donoghue. 2001. Conodonts: past, present, future. Journal of Paleontology 75 (6): 1174–1184.

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