Answers are grounded in this paper and cite their sources.
The terminology used for the groups of photophores is presented in figures 1 and 2, on pages 588-589.Each fin ray that has a separate base was counted, and all rudiments of gill rakers were counted on the first gill arch. Radiographswere expertly made by Robert H. Kanazawa and T. John Leppi for the various genera and species of this family, and from those films the number of vertebrae are recorded in table 1, p. 591.
No takes yet. Share an insight, caveat, or question.
Leonard P. Schultz (1961) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: