Elictognathidae

Elements of Alternognathus buelensis, from Dzik (2015).

Belongs within: Spathognathodontidae.

The Elictognathidae are a group of conodonts known from the late Devonian and early Carboniferous (Sweet 1988).

Characters (from Sweet 1988): Pa elements carminiplanate, with more or less well-developed keel, with median groove, present anterior to basal pit. No well-defined keel on attachment surface posterior to basal pit, with this position occupied by broad flat area (pseudokeel), which may have a thin groove for some part or all of its length, or by low, broad keel that is considerably less distinct than that one anterior of pit.

<==Elictognathidae
    |--Falcodus Huddle 1934S88
    |    `--*F. angulus Huddle 1934H62
    |--Elictognathus Cooper 1939S88 (see below for synonymy)
    |    |--*E. bialata (Branson & Mehl 1934) [=Solenognathus bialata]H62
    |    `--E. lacerataH62
    |--Dinodus Cooper 1939S88
    |    |--*D. leptus Cooper 1939H62
    |    `--D. fragosusH62
    `--Alternognathus Ziegler & Sandberg 1984S88
         |--A. pseudotrigosus (Dreesen & Dusar 1974)S88, AS93
         `--+--A. buelensisS88
            `--A. regularisS88

Elictognathus Cooper 1939S88 [incl. Solenodella Branson & Mehl 1944H62, Solenognathus Branson & Mehl 1934 nec Agassiz 1846 nec Bleeker 1856-1857 nec Pictet & Humbert 1866H62]

*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.

[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.

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

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