Apparatus elements of Prioniodus, from Sweet (1988).

Belongs within: Prioniodontida.

The Prioniodontidae are a group of conodonts known from the Early and Middle Ordovician that posses seximembrate skeletal apparatus with the two P positions occupied by morphologically identical pastinate elements with three denticulate processes (Sweet 1988).

<==Prioniodontidae [Prioniodidae, Prioniodontinae]
    |--Angulodus Huddle 1934H62
    |    `--*A. demissus Huddle 1934H62
    |--Cardiodella Branson & Mehl 1944 [=Cardiodus Brandon & Mehl 1933 non Trouessart 1881]H62
    |    `--*C. tumida (Branson & Mehl 1933) [=*Cardiodus tumidus]H62
    |--Dichognathus Branson & Mehl 1933H62
    |    `--*D. prima Branson & Mehl 1933H62
    |--Tortoniodus Stauffer 1935H62
    |    `--*T. politus Stauffer 1935H62
    |--Bryantodus Bassler 1925H62
    |    |--*B. typicus Ulrich & Bassler 1926H62
    |    `--B. delicatusH62
    |--Plectospathodus Branson & Mehl 1933H62
    |    |--*P. flexuosus Branson & Mehl 1933H62
    |    `--P. alternatusTC71
    |--Oepikodus Lindström 1955S88
    |    |--O. communis (Ethington & Clark 1964)AS93
    |    |--O. evaePBJ03
    |    |--O. intermediusAB04
    |    `--O. minutus (McTavish 1973)AS93
    `--Prioniodus Pander 1856S88
         |--*P. elegans Pander 1856H62
         |--P. adamiAB04
         |--P. communisS88
         |--P. crassulusPBJ03
         |--P. evaeS88
         |--P. gilberti Stouge & Bagnoli 1988AS93
         |--P. oepikiAB04
         `--P. triangularisJ79

*Type species of generic name indicated


[AB04] Albanesi, G. L., & S. M. Bergström. 2004. Conodonts: Lower to Middle Ordovician record. In: Webby, B. D., F. Paris, M. L. Droser & I. G. Percival (eds) The Great Ordovician Biodiversification Event pp. 312–326. Columbia University Press.

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

[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.

[J79] Jaanusson, V. 1979. Ordovician. In: Robison, R. A., & C. Teichert (eds) Treatise on Invertebrate Paleontology pt A. Introduction. Fossilisation (Taphonomy), Biogeography and Biostratigraphy pp. A136–A166. The Geological Society of America, Inc.: Boulder (Colorado), and The University of Kansas: Lawrence (Kansas).

[PBJ03] Pyle, L. J., C. R. Barnes & Z. Ji. 2003. Conodont fauna and biostratigraphy of the Outram, Skoki, and Owen Creek Formations (Lower to Middle Ordovician), Wilcox Pass, Alberta, Canada. Journal of Paleontology 77 (5): 958–976.

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

[TC71] Thomson, K. S., & K. S. W. Campbell. 1971. The structure and relationships of the primitive Devonian lungfish—Dipnorhynchus sussmilchi (Etheridge). Yale University Peabody Museum of Natural History Bulletin 38: 1–109.

Leave a comment

Your email address will not be published. Required fields are marked *