Pseudoscopelus altipinnis Parr, 1933

Melo, Marcelo R. S., 2019, A revision of the genus Pseudoscopelus Lütken (Chiasmodontidae: Acanthomorphata) with descriptions of three new species 2710, Zootaxa 2710 (1), pp. 1-78 : 36

Pseudoscopelus altipinnis Parr species group

Composition. The Pseudoscopelus altipinnis species group is composed of two species: P. altipinnis and P. paxtoni .

Diagnosis. The Pseudoscopelus altipinnis group is diagnosed from its congeners by a combination of characteristics: luminescent tissue present as discrete photophores (vs. completely absent in P. aphos and as vestigial white lines in P. parini ); trf in a single series of widely spaced photophores, without a medial circular cluster (vs. trf on a single row of closely spaced organs, with a medial, circular cluster in the P. scriptus species group; absent in the P. astronesthidens and P. scutatus species groups; in a broad band of three or four photophores in P. lavenbergi ); mxf in an irregular elongated single row with widely spaced photophores anteriorly, extending from below mid-eye anteriorly and connected to apf posteriorly (vs. both mxf and apf absent in the species of the P. scutatus species group; mxf absent and apf present in P. lavenbergi ; mxf short, not connected posteriorly with apf present in the species of the P. astronesthidens species group; mxf on single elongate continuous row from level of posterior margin of eye anteriorly to angle between preopercle and dentary, and apf absent in the species of the P. scriptus species group).