Temnocheilus

Belongs within: Tainoceratoidea.

Temnocheilus was a genus of nautilid found during the Carboniferous and Permian in what is now North America and Europe.

Characteristics (from Kummel 1964): Evolute, with large, open, perforate umbilicus; whorl section subtrapezoidal, flattened ventrally and laterally, slightly impressed dorsally; lateral zones convergent dorsally; deep hyponomic sinus on venter; ventrolateral shoulders bearing single row of longitudinally elongate nodes; sutures with ventral, lateral and dorsal lobes; siphuncle small, subcentral, orthochoanitic.

<==Temnocheilus M’Coy 1844H99 (see below for synonymy)
    |--*T. coronatus (M’Coy 1844) [=Nautilus (*Temnocheilus) coronatus]H99
    |--T. annulonodosus Sturgeon et al. 1982H99
    |--T. asiaticusG31
    |--T. bellicosus Morton 1836H99
    |--T. carbonarius Foord 1891H99
    |--T. concavus (Sowerby 1840)H99
    |--T. coronatiformae Shimansky 1967H99
    |--T. costatocoronatus M’Coy 1844H99
    |--T. crassus Hyatt 1891P68
    |--T. depressus Hyatt 1884H99
    |--T. derbiensis Hind 1914H99
    |--T. forbesianus McChesney 1859H99
    |--T. grewingkiG31
    |--T. harneri Miller & Owen 1934H99
    |--T. inaequilaterale Miller & Youngquist 1949P68 [=*Leonardocheilus inaequilateralisK64]
    |--T. johnsoni Miller, Dunbar & Condra 1933H99
    |--T. latus Meek & Worthen 1870H99
    |--T. pernodosusG31
    |--T. subrectangularis Miller, Dunbar & Condra 1933H99
    |--T. tuberosus M’Coy 1844H99
    |--T. ventroconcavus Platt 1938H99
    `--T. winslowi Meek & Worthen 1870H99 [=Nautilus (Temnocheilus) winslowiP68]

Temnocheilus M’Coy 1844^H99 [incl. Articheilus Ruzhentsev & Shimanskiy 1954^K64, Leonardocheilus Ruzhentsev & Shimanskiy 1954^K64, Pseudotemnocheilus Ruzhentsev & Shimanskiy 1954^K64]

*Type species of generic name indicated

References

[G31] Grabau, A. W. 1931. The Permian of Mongolia: A report on the Permian fauna of the Jisu Honguer limestone of Mongolia and its relations to the Permian of other parts of the world. American Museum of Natural History: New York.

[H99] Histon, K. 1999. A revision of A. H. Foord’s monograph of Irish Carboniferous nautiloid cephalopods (1897–1901). Part 2. Monograph of the Palaeontographical Society 153: 63–129.

[K64] Kummel, B. 1964. Nautiloidea—Nautilida. In: Moore, R. C. (ed.) Treatise on Invertebrate Paleontology pt K. Mollusca 3. Cephalopoda—General Features—Endoceratoidea—Actinoceratoidea—Nautiloidea—Bactritoidea pp. K383–K457. The Geological Society of America and the University of Kansas Press.

[P68] Purnell, L. R. 1968. Catalog of the type specimens of invertebrate fossils. Part I: Paleozoic Cephalopoda. United States National Museum Bulletin 262: 1–198.