Sphenodiscus lobatus Tuomey 1856 (ammonite)

Cephalopoda - Ammonitida - Sphenodiscidae

Alternative combination: Ammonites lobata

Invalid subtaxa: Ammonites lenticularis Owen 1852 [replaced name], Sphenodiscus lenticularis Owen 1852 [replaced name]

Belongs to Sphenodiscus according to E. S. M. Moneer et al. 2021

See also Al-Harithi and Ibrahim 1992, Böse 1928, Hyatt 1903, Kennedy 1986, Kennedy and Cobban 1996, Kennedy et al. 1997, Reyment 1955, Zaborski 1982 and Zaborski 1985

Sister taxa: Sphenodiscus aberrans, Sphenodiscus beecheri, Sphenodiscus binkhorsti, Sphenodiscus brasiliensis, Sphenodiscus corroyi, Sphenodiscus intermedius, Sphenodiscus konincki, Sphenodiscus parahybensis, Sphenodiscus pleurisepta, Sphenodiscus prepleurisepta, Sphenodiscus siva, Sphenodiscus stantoni, Sphenodiscus ubaghsi

Subtaxa: Sphenodiscus lenticularis mississippiensis Sphenodiscus lenticularis splendens

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Ecology: fast-moving nektonic carnivore

Average measurements (in mm): shell diameter 104.7

Distribution:

• Cretaceous to Paleogene of United States (1: New Jersey collection)

• Cretaceous of Egypt (2), Jordan (3), Mexico (4), Nigeria (3), United States (24: Alabama, Maryland, Mississippi, Missouri, New Jersey, South Carolina, South Dakota, Texas, Wyoming)

Total: 37 collections each including a single occurrence

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Specimen images are retrieved through the ePANDDA API.


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