Badioglobus, Short, 2004

Short, Andrew Edward Z., 2004, A New Genus and Species of Sphaeridiinae from Costa Rica (Coleoptera: Hydrophilidae), The Coleopterists Bulletin 58 (4), pp. 534-537 : 535-536

Badioglobus , new genus

( Figs. 1–4 )

Etymology. Derived form the Latin words badius and globus, meaning reddishbrown sphere; masculine.

Type Species. Badioglobus tapanti , new species.

Description. Dorsal punctation on head, pronotum and elytra distinct and fine. Labrum weakly sclerotized, mostly concealed by clypeus. Clypeus entire, not incised at antennal bases. Maxillary palpi short and symmetrical; barely reaching eye, with second segment swollen ( Fig. 3 ). Apex of mandibles asymmetrically bifid. Labial palpi 2/3 width of mentum. Antennae composed of 9 segments; the 3-segment club mostly compact. Mentum concave anteriorly, with apicomedial

536 emargination extending posterad about 1/3 of length; deeply pitted. Gular sutures widely separated ( Fig. 2 ). Prosternum tectiform, slightly carinate medially with large anterior tooth; notosternal sutures present. Scutellum slightly longer than wide. Anteriomedial margin of mesosternum strongly elevated, almost as high as the posteriomedial mesosternal projection; postero and centromedial mesosternum raised to form broad, lateral projection, narrowly and basally touching the anterior of the metasternum; without pit-like grove anteromedially. All femora with tibial groves; finely and evenly pubescent; all tarsi with 5 segments. Tibia slightly flattened. Tarsi with sparse setae on dosal face. First tarsomere on middle and hind legs shorter than second. Claws simple; only slightly enlarged at base. Elytra with sutural stria in posterior 1/2 and 9 additional rows of serial punctures, moderately impressed. Abdomen dull and finely pubescent; first visible ventrite carinate on basal 1/2; fifth visible ventrite not emarginate.

Remarks. Badioglobus superficially resembles Cyclotypus Sharp but the new genus is easily distinguished from this and the other three sympatric coelostomine genera by its larger size, reddish brown coloration, and short first segment of the hind tarsus. These characters combined with the very widely spaced gular sutures and distinct notosternal suture easily separate this genus from all others in the tribe. Badioglobus will key to Adolopus in Hansen (1991) although it will not fit the description.

Figures

Figs. 1–4. Badioglobus tapanti. 1)Aedeagus, ventral view; 2) head, ventral view showing gular sutures; 3) maxillary palpus; 4) habitus.