Maccoyoceras Miller, Dunbar & Condra, 1933

Korn, Dieter & Bockwinkel, Jürgen, 2022, Early Carboniferous nautiloids from the Central Sahara, southern Algeria, European Journal of Taxonomy 831, pp. 67-108 : 99

publication ID	https://doi.org/10.5852/ejt.2022.831.1871
publication LSID	lsid:zoobank.org:pub:EAA2EAE2-DA8B-4516-B332-CB8423B8EEAA
DOI	https://doi.org/10.5281/zenodo.6885238
persistent identifier	https://treatment.plazi.org/id/9327592F-F40A-1972-FDE3-1F44FBDA52F8
treatment provided by	Felipe
scientific name	Maccoyoceras Miller, Dunbar & Condra, 1933
status

Treatment

Genus Maccoyoceras Miller, Dunbar & Condra, 1933

Type species

Nautilus ( Discites) discors M’Coy, 1844 ; original designation.

Diagnosis

Genus of the family Trigonoceratidae with evolute conch; whorls slightly impressed; whorl profile hexagonal or pentagonal with flattened or slightly concave venter and narrowly rounded umbilical margin. Ornament in the adult stage with coarse growth lines, in the preadult stage with fine spiral lines. Suture line with shallow external and lateral lobes. Siphuncle small with subcentral position (after Kummel 1964; emended by Korn et al. 2022).

Included species

Nautilus ( Trematodiscus) discoidalis Winchell, 1862 , Michigan; Nautilus ( Discites) discors M’Coy, 1844 , Ireland; Nautilus Leveilleanus de Koninck, 1844 View in CoL , Belgium; Maccoyoceras pentagonum Korn, Miao & Bockwinkel, 2022 , Algeria; Discitoceras Wrightii Foord, 1900 , Ireland; Maccoyoceras saharensis sp. nov., Algeria; Maccoyoceras habadraense sp. nov., Algeria.