Petersius Hilgendorf, 1894

Melo, Bruno F. & Stiassny, Melanie L. J., 2022, Systematic review and cranial osteology of Petersius with redescription of P. conserialis (Teleostei: Alestidae) from the Rufiji and Ruvu rivers of Tanzania, American Museum Novitates 2022 (3992), pp. 1-16 : 3

Petersius Hilgendorf, 1894

TYPE SPECIES: Petersius conserialis Hilgendorf, 1894 . Type by monotypy.

DIAGNOSIS: Petersius is diagnosed by a unique cuspidation pattern of the inner row premaxillary dentition with the cusps of the cutting-edge oriented buccally (vs. lingually oriented in all other alestids), and the possession of a distinctively shaped margin of the supraoccipital with a steep anterodorsal convexity at the junction of the parietals followed by a dorsomedial concavity on the surface of the supraoccipital.

DESCRIPTION. Corresponds to the description of the type species Petersius conserialis Hilgendorf, 1894 .

ETYMOLOGY. In naming Petersius Hilgendorf (1894) honored the naturalist and curator Wilhelm C.H. Peters of the Museum für Naturkunde, Berlin .