Olibroporus Casey, 1890

Gimmel, Matthew L., 2013, <strong> Genus-level revision of the family Phalacridae (Coleoptera: Cucujoidea) </ strong>, Zootaxa 3605 (1), pp. 1-147 : 61-64

14. Olibroporus Casey, 1890

( Figs. 17 ; 40a )

Olibroporus Casey 1890: 111 . Type species: Olibroporus punctatus Casey 1890 , fixed by monotypy.

Parasemus Guillebeau 1894 a: 281 . Type species: Parasemus grouvellei Guillebeau 1894 , fixed by original designation. Syn. nov.

Type material. Olibroporus punctatus Casey : holotype, “Type // Fla // Pseudolibrus [sic] \ punctatus [handwritten]” ( USNM).

Parasemus grouvellei Guillebeau : holotype, “ Australia [handwritten, LOCALITY PROBABLY IN ERROR] // Grouvelle [handwritten] // HOLOTYPE \ Parasemus \ grouvellei Guillebeau \ det. M.L. Gimmel 2009 [red label]” ( MNHN), point mounted.

Diagnosis. Recognized by the combination of lack of protibial ctenidium, metaventral process not protruding, metaventral postcoxal lines not separated from coxal cavities, small scutellar shield, metatarsomere I shorter than II, mandible with apex bidentate and with dorsal row of small, blunt teeth, and elytra without diffraction grating.

Description. Small to medium-sized, total length 1.7–2.5 mm. Color completely piceous to black ( Fig. 40a ). Tibial spur formula 2-2-2, tarsal formula 5-5- 5 in both sexes.

Head. Not constricted behind eyes. Eyes large; facets convex; interfacetal setae absent; weakly emarginate medially; without posterior emargination; periocular groove present; with transverse setose groove ventrally behind eye. Frontoclypeus emarginate above antennal insertion; clypeal apex arcuate-truncate. Antennal club 3- segmented, club weakly asymmetrical, antennomere XI slightly constricted on anterior edge ( Fig. 17b ). Mandible ( Fig. 17a ) with apex bidentate, with row of two or more small, rounded teeth on dorsal edge; without retinaculum; mandible without ventral ridge. Maxillary palpomere IV short, fusiform, nearly symmetrical; galea short, rounded; lacinia with two stout spines. Mentum with sides divergent toward apex; labial palpomere III fusiform. Labrum with apical margin arcuate. Gular sutures short, barely evident.

Thorax. Pronotum without obvious microsetae; with quite weakly developed scutellar lobe. Prosternum anteriorly with continuous row of marginal setae, setae flattened at base; procoxal cavity with anterolateral notchlike extension; prosternal process angulate in lateral view, not conspicuously setose preapically, without spinelike setae at apex. Protrochanter with setae; protibia without ctenidium on kickface ( Fig. 17c ). Scutellar shield small. Elytron without spectral iridescence; with one sutural stria; disc of elytra with conspicuous rows of punctures; without transverse strigae; lateral margin with row of tiny, sawtooth-like setae. Mesoventral plate ( Fig. 17f ) notched anteriorly, extending posteriorly to metaventrite, dividing mesoventral disc in two, forming procoxal rests; mesanepisternum with incomplete transverse carina; mesocoxal cavities widely separate, separated by more than half width of a coxal cavity. Mesotarsomere III bilobed. Metaventral process ( Fig. 17f ) extending nearly to anterior level of mesocoxae; metaventral postcoxal lines not separated from mesocoxal cavity margin; discrimen long, extending about halfway to anterior margin of metaventral process; metendosternite ( Fig. 17g ) with anterior tendons moderately separated, ventral process intersecting ventral longitudinal flange behind anterior margin. Anterior margin of metacoxa with emargination sublaterally; metacoxal plate with transverse line; metatibial foreface with apical ctenidium roughly perpendicular overall to long axis of tibia; spurs cylindrical, longest spur shorter than width of tibial apex; metatarsomere I slightly shorter than metatarsomere II, joint between I and II rigid ( Fig. 17d ); metatarsomere III bilobed. Hind wing ( Fig. 17e ) with distinct, ovate anal lobe; leading edge without row of long setae at level of RA +ScP; AA 3+4 very faintly indicated, crossvein to Cu absent; cubitoanal system unbranched apically; CuA 2 and MP 3+4 with faint distal remnants; r4 weakly developed, connected with RA 3+4; conspicuous fleck present in apical field just distal to rp-mp2; long transverse proximal sclerite and additional small triangular sclerite present just distal to end of radial bar.

Abdomen. Abdominal ventrite I without paired lines, with distinct calli; spiracles present and apparently functional on segment VII. Male with aedeagus upright in repose; tegmen ( Fig. 17h ) with symmetrical anterior margin and parameres hinged to basal piece, parameres without medial longitudinal division; penis ( Fig. 17i ) with pair of endophallic sclerites and spicules, apex weakly bilobed; spiculum gastrale V-shaped, with arms free. Female ovipositor weakly sclerotized, palpiform.

Immature stages. Unknown.

Bionomics. Habits of members of this genus are unknown. Specimens whose collection information is known have been collected using Malaise and blacklight traps. One Florida specimen was collected by “beating burned oaks.”

Distribution and diversity. Occurring from New Jersey, USA, west to Baja California Sur, Mexico, and south to Brazil. From the West Indies I have seen specimens from Cuba and the Cayman Islands. Based on dissection of male genitalia, at least two species are present in this genus, but the association of the two currently valid names with these is unclear at present.

Included species (2):

Olibroporus grouvellei (Guillebeau, 1894) , comb. nov. ( Parasemus ) (Distribution: unknown) (type!)

Olibroporus punctatus Casey, 1890 ( Distribution : United States) (type!)

Discussion. The holotype of Parasemus grouvellei , although bearing the label “ Australia,” is identical to specimens of the New World Olibroporus . I have seen no additional specimens resembling Olibroporus outside of the New World and I strongly suspect P. grouvellei has an erroneous locality label. Regardless, the specimen matches Guillebeau’s description and is certainly the true holotype. I therefore propose the synonymy of Parasemus with Olibroporus . I have created a new genus, Austroporus (see above), for most of the species attributed to Parasemus by Blackburn (1891, 1895, 1899, 1902) and later by Lea (1932). One species described in Parasemus , P. uniformis (Blackburn) , has subsequently been moved to Phalacrus (see Thompson and Marshall 1980), while another ( P. parvopallidus Lea ) has been removed from Phalacridae altogether (see “Taxa removed from Phalacridae ” below).

Figures

FIGURE 17. Olibroporus punctatus, male. (a) Left mandible, dorsal; (b) left antenna (scale bar = 0.5 mm). (c) Left protibia and tarsus, dorsal; (d) left metatibia and tarsus, ventral (scale bar = 0.5 mm). (e) Hind wing (scale bar = 1.0 mm). (f) Meso- and metaventrite, ventral (scale bar = 0.5 mm). (g) Metendosternite (scale bar = 0.5 mm). (h) Tegmen, dorsal; (i) penis, dorsal (scale bar = 0.5 mm).

FIGURE 40. Photographs. Olibroporus punctatus: (a) dorsal. Pycinus sp.: (b) dorsal; (c) ventral. Ochrolitus rubens: (d) dorsal; (e) ventral. Sveculus lewisi, holotype: (f) dorsal; (g) ventral. Tolyphus (Tolyphus) granulatus: (h) dorsal; (i) head and pronotum laterally, showing eye facets.