Idahoteuthidae Doguzhaeva and Brayard, 2018

Doguzhaeva, Larisa A., Brayard, Arnaud, Goudemand, Nicolas, Krumenacker, Laurel J., Jenks, James F., Bylund, Kevin G., Fara, Emmanuel, Olivier, Nicolas, Vennin, Emmanuelle & Escarguel, Gilles, 2018, An Early Triassic gladius associated with soft tissue remains from Idaho, USA-a squid-like coleoid cephalopod at the onset of Mesozoic Era, Acta Palaeontologica Polonica 63 (2), pp. 341-355 : 347

Family Idahoteuthidae Doguzhaeva and Brayard nov.

Type genus: Idahoteuthis Doguzhaeva and Brayard gen. nov.; see below, monogeneric.

Diagnosis. —Cylindrical, stream-line, dorsally cartilaginous muscular mantle; two well-developed, ca. 0.2–0.3 mantle length, pear-shape fin-supported cartilages and fins at conical mantle termination; thin slender gladius with narrow median and lateral fields, rachis; breviconic conus as long as fin-supported cartilages and fins.

Geographic and stratigraphic range. —Middle Olenekian (early Spathian) Lower Shale unit of the Lower Triassic Thaynes Group; west of the city of Paris, Bear Lake County, southeastern Idaho, western USA.