Endolobus Meek & Worthen 1865
Creators
- 1. Museum für Naturkunde, Leibniz Institute for Research on Evolution and Biodiversity, Invalidenstrasse 43, 10115 Berlin, Germany.
- 2. Paläontologisches Institut und Museum, Universität Zürich, Karl-Schmid-Strasse 4, 8006 Zürich, Switzerland.
Description
Genus Endolobus Meek & Worthen, 1865
Type species
Nautilus (Endolobus) peramplus Meek & Worthen, 1865 (= Nautilus spectabilis Meek & Worthen, 1860); original designation.
Diagnosis
Genus of the family Trigonoceratidae with usually pachyconic, subinvolute or evolute conch; whorls usually slightly impressed, whorl profile compressed with broadly rounded or slightly flattened venter and rounded umbilical margin. Conch very rapidly increasing in height with a high coiling rate (WER usually higher than 2.50). Sculpture with broad, rounded nodes on the flanks. Septa without inflexions, moderately concave. Suture line nearly straight with very shallow external lobe and usually with an internal lobe; some species with an annular lobe. Siphuncle with subcentral position.
Included Early Carboniferous species
North America(Meek & Worthen 1860, 1865; Miller & Gurley 1897; Miller & Collins 1947; Youngquist 1949; Collinson 1955; Sweet & Brookley 1956): Nautilus spectabilis Meek & Worthen, 1860, Illinois; Nautilus (Endolobus) peramplus Meek & Worthen, 1865 (synonym of Nautilus spectabilis); Temnochilus greenense Miller & Gurley, 1897, Indiana; Endolobus greenbrierensis Miller & Collins, 1947, Pennsylvania; Solenochilus occidens Youngquist, 1949, Nevada; Endolobus clorensis Collinson, 1955; Kentucky; Endolobus indianensis Sweet & Brookley, 1956, Indiana.
North Africa (this paper): Endolobus rota sp. nov., Anti-Atlas.
Remarks
Endolobus is a genus in need of revision both in its definition and possible phylogenetic position. For example, according to Gordon (1965), the annular lobe belongs to the diagnosis of the genus, whereas Shimansky (1967) did not consider this a necessary character. The assignment of the material from the Anti-Atlas can therefore only be tentative. Early Carboniferous species are known mainly from North America (for a species list, see Gordon 1965). Most of them are very large specimens, which makes a comparison with considerably smaller specimens difficult. The material from the Anti-Atlas is not very typical for Endolobus and occupies a marginal position within the genus.
Notes
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Linked records
Additional details
Identifiers
Biodiversity
- Family
- Koninckioceratidae
- Genus
- Endolobus
- Kingdom
- Animalia
- Order
- Nautilida
- Phylum
- Mollusca
- Scientific name authorship
- Meek & Worthen
- Taxon rank
- genus
- Taxonomic concept label
- Endolobus Meek, 1865 sec. Korn & Klug, 2023
References
- Meek F. B. & Worthen A. H. 1865. Contributions to the palaeontology of Illinois and other western states. Proceedings of the Academy of Natural Sciences of Philadelphia 17: 245 - 273.
- Meek F. B. & Worthen A. H. 1860. Descriptions of new Carboniferous fossils from Illinois and other western States. Proceedings of the Academy of Natural Sciences of Philadelphia 12: 447 - 472.
- Miller S. A. & Gurley W. F. E. 1897. New species of crinoids, cephalopods and other Palaeozoic fossils. Bulletin of the Illinois State Museum of Natural History 12: 48 - 53.
- Miller A. K. & Collins L. R. 1947. Endolobus from the Greenbrier limestone of Pennsylvania. Journal of Paleontology 21: 239 - 241.
- Youngquist W. 1949. The cephalopod fauna of the White Pine shale of Nevada. Journal of Paleontology 23: 276 - 305.
- Collinson C. 1955. A new species of Endolobus (Nautiloidea) from the Clore limestone (Chester) of western Kentucky. Journal of Paleontology 29: 178 - 181.
- Sweet W. C. & Brookley A. C. 1956. An Endolobus from the Beaver Bend Limestone (Chester) of Indiana. Journal of Paleontology 30: 101 - 103.
- Gordon M. Jr. 1965. Carboniferous cephalopods of Arkansas. Professional Papers, U. S. Geological Survey 460: 1 - 322. https: // doi. org / 10.3133 / pp 460
- Shimansky V. N. 1967. Kamennougol'nye Nautilida. Trudy paleontologicheskogo Instituta Akademiya Nauk SSSR 115: 1 - 244.