Podocerus hanapepe J. L. Barnard 1970

Podocerus hanapepe

DIAGNOSIS OF MALE.—Lateral cephalic lobe quadrate anteroventrally, head extended quadrately forward, lateral ocular bulges of medium extent, divorced from anteroventral corner, red in formaldehyde, ochraceous in alcohol, with weak core of dark pigment; accessory flagellum 1-articulate and very small, antennae 1–2 short; coxa 1 strongly extended forward, article 6 of gnathopod 1 triangular, distally expanded, palm transverse, defined by small spine, dactyl with weak inner serrations, article 6 with extremely stout semipinnate setal spines, article 5 slightly longer than 6, posterior lobe broadly bulging; article 2 of gnathopod 2 with small, distal, anterolateral, obtusely pointed lobe, article 4 long and apically extended as blunt triangle, palm oblique and defined by stout cusp and 2 spines, dactyl almost fitting palm, palm weakly setose and bearing broad, low, castellate distal process and smaller proximal quadrate cusp; article 2 of pereopods 1–5 very short and stout, bilaterally lobate on pereopod 3, outer ramus of uropod 1 about three-fourths as long as inner ramus but appearing shorter from lateral view, uropod 2 very stout, outer ramus about 60 percent as long as inner; uropod 3 small but with 2 apical-subapical spines; telson subcircular-quadratiform, bearing dorsal nob armed with 2 long stout spines; pereonites 1–3 with weak transverse dorsal depressions, pereonites 4–5 shortest of all but pereonite 6 not extremely broadened nor heavily muscularized and all segments clearly articulate; pereonite 7 and pleonites 1–2 scarcely elevated posterodorsally; pleonal epimera 1–3 evenly rounded below.

FEMALE.—Unknown.

HOLOTYPE.—Bishop Museum collections, catalog number 7299, male, 2.4 mm. Unique.

TYPE-LOCALITY.—Fee 1, Waikiki Beach, Oahu, intertidal, Ulva lactuca, 21 April 1967.

RELATIONSHIP.—The overall appearance of this species resembles that of P. mangarevae Chevreux (1908), but P. hanapepe has a slightly more extended and squared-off head, a fully transverse palm on gnathopod 1, no anterior taper on coxa 1, a short accessory flagellum, a strong distal extension on article 4 of gnathopod 2, a slightly stronger defining tooth on the the palm of gnathopod 2, and only 2 telsonic spines that are larger than on P. mangarevae. Antenna 2 of P. mangarevae is very conspicuously longer than antenna 1, a condition not true of P. hanapepe.

Possibly P. mangarevae is a synonym of P. zeylanica (Walker, 1904), and the same differences are approximately applicable between P. hanapepe and P. zeylanica as mentioned above except for coxa 1 and the defining tooth of gnathopod 2 palm. Antennal lengths for P. zeylanica were not mentioned, and the telson has 1 large and 2 small spines.

Podocerus inconspicuus (Stebbing, 1888), from southeast Australia, but apparently not that taxon identified by Pirlot (1938), is very close to P. hanapepe, even though the 2 species are based on opposite sexes and various missing parts of P. inconspicuus preclude their description. Gnathopod 1 of P. inconspicuus (based on a female) has a very narrow article 5 in comparison to that of P. hanapepe.

DISTRIBUTION.—Hawaiian Islands.