. Bulletin. Science. Fig. 4. Characteristic arrangement of predorsal bones (left lateral view) in Pacific species of Lile. (A) L. nigrofasciata sp. nov., (B) L. stolifera and (C) L. gracilis, cr, cranium; ns, neural spine; pd, predorsal bone; pr, proximal radial of dorsal fin support. the Mexican central Pacific to Golfo de Fonseca, Honduras (S. Contreras-Bald- eras, unpublished data). Photographs of specimens identified as "Lile stolifera' that were provided by Chirichigno (1963: 14, fig. 5) and Yanez-Arancibia ("1978" [1980]: 266, plate 12, fig. 4) correspond to L. nigrofascia
. Bulletin. Science. Fig. 4. Characteristic arrangement of predorsal bones (left lateral view) in Pacific species of Lile. (A) L. nigrofasciata sp. nov., (B) L. stolifera and (C) L. gracilis, cr, cranium; ns, neural spine; pd, predorsal bone; pr, proximal radial of dorsal fin support. the Mexican central Pacific to Golfo de Fonseca, Honduras (S. Contreras-Bald- eras, unpublished data). Photographs of specimens identified as "Lile stolifera' that were provided by Chirichigno (1963: 14, fig. 5) and Yanez-Arancibia ("1978" [1980]: 266, plate 12, fig. 4) correspond to L. nigrofasciata. It is not feasible to present a probable phylogeny of the genus because more detailed anatomical studies of the four nominal species are needed, particularly the osteology of the caudal complex and the neurocranium, as well as a compar- ative study of their early ontogenic stages. Based on some osteologic aspects of Lile gracilis, Vivero and Romero-Castillo (1990) proposed that the allopatrical processes led to the persistence of neotenic characters. It is necessary, however, Fig. 5. Comparison of the caudal skeleton (left lateral view) of the three species of the genus Lile in the eastern tropical Pacific. (A) L. nigrofasciata sp. nov., (B) L. stolifera and (C) L. gracilis, a, radial cartilage; cp, preural centrum; e, epural; h, hypural; na, neural modified spine; o, opisthural cartilage; ph. parhypural; u, ural centrum; un, uroneural. Stippled areas, Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Southern California Academy of Sciences. Los Angeles, Calif. : The Academy
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