Spicomacrurus
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| Taxonavigation: Gadiformes |
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Superregnum: Eukaryota |
Familia: Macrouridae
Subfamilia: Macrourinae
Genus: Spicomacrurus
Diagnosis: A member of the family Macrouridae, subfamily Macrourinae. Branchiostegal rays 7. Anus and urogenital pore situated within a small periproct area that lies immediately before anal fin. The so-called “ventral striae” of Gilbert and Hubbs (1916: 186) “consisting of fine parallel lines of dark, alternating with silvery pigment” associated with a light-producing function (Cohen 1964: 406–409) on abdominal wall, parts of chest, and shoulder girdle. A small, elongated, translucent lens of the light organ immediately anterior to anus; a small, round, sometimes indistinct lens mesially on chest slightly anterior to a transverse line connecting anterior ends of pelvic-fin bases (Fig. 1C). Gular region covered with fine black strands of epithelium in a net-like pattern, the whole resting upon underlying layer of dermis. Nasal bones forming broad, horizontal, lateral, and medial processes; nasal bones of both sides in broad contact (two species), or widely separated by rostral cartilage (two species). No serrations on leading edge of spinous dorsal-fin ray. Pelvic fin rays 8–10, outer ray greatly elongated, flattened with narrow ribbon-like flange on free distal portion, penultimate portion sometimes more-broadly expanded. Barbel short but well developed. Gill membranes narrowly attached to isthmus, with a narrow free fold; opercular opening extending forward to vertical under or slightly anterior to posterior margin of orbit. Gill rakers on short, slightly raised bases, 12 or fewer on inner side of first arch, < 14 total. Small, conical teeth in long narrow bands in both jaws; teeth sharply pointed or bluntly flanged. Scales large, highly deciduous, of “Hymenogadus-type” (of Okamura 1970b: 11) with complete concentric rings and radial grooves basally, and exposed fields either covered with short, sharp, conical, recurved spinules or lacking spinules.
Species:
S. adelscotti – (Iwamoto & Merrett, 1997);
S. dictyogadus – Iwamoto, Shao & Ho, 2011;
S. kuronumai – Kamohara, 1938;
S. mccoskeri – Iwamoto, Shao & Ho, 2011
Name[edit]
Spicomacrurus Okamura, 1970: 63
Type species: Hymenocephalus kuronumai Kamohara, 1938. Type by original designation (also monotypic).
References[edit]
- Okamura, O. 1970: Fauna Japonica. Macrourina (Pisces). Academic Press of Japan. 1-216, Pls. 1-44.
- Iwamoto, T. , K.-T. Shao & H.-C. Ho 2011: Elevation of Spicomacrurus (Gadiformes: Macrouridae) to generic status, with descriptions of two new species from the southwestern Pacific. Bulletin of Marine Science, 87(3): 513–530. DOI: 10.5343/bms.2011.1004