FIGURE 4 in Description of a new genus of ponyfishes (Teleostei: Leiognathidae), with a review of the current generic-level composition of the family

FIGURE 4. Comparison of internal and external anatomy of LOS in sister genera Equulites and Photolateralis, new genus: (A) Translucent lateral flank stripe comprised of discrete "windows" in male Photolateralis stercorarius (SIO 96-96, 98.2mm SL, Philippines). (B) Internal anatomy of LOS in male P. stercorarius (AMNH uncat., [VN-2010-11], 73.1 mm SL, Vietnam). Note comparatively small donut shaped, spotted light organ and posterior lateral clearing of silvery gas bladder lining. (C) Expansive translucent, triangular lateral flank patch characteristic of male members of Equulites (E. elongatus, UMMZ uncat., [PVD 82- 06/19a LE], 76.4 mm SL, Japan). (D) Internal anatomy of LOS in male E. elongatus (UMMZ uncat., 68.0 mm SL, Japan). Note greatly enlarged dorsolateral light-organ lobes in Equulites that extend posteriorly well into gas bladder, and lateral clearing of silvery guanine layer running entire length of gas bladder. Light organs circled in yellow. Figure abbreviations: gb = gas bladder, mls = translucent mid-lateral stripe, tp = translucent, triangular lateral flank patch.