Oedichirus bullaglaber, Herman, 2013

Herman, Lee H., 2013, Revision Of The New World Species Of Oedichirus (Coleoptera: Staphylinidae: Paederinae: Pinophilini: Procirrina), Bulletin of the American Museum of Natural History 2013 (375), pp. 1-137 : 52-57

Oedichirus bullaglaber , new species

Figures 40 , 70–79

TYPE MATERIAL: Holotype. Male. ‘‘ Brasilien: Nova Teutonia, 27 ° 119B. 52 ° 239L. Fritz Plaumann, 29 2 1939 /rufipennis Bernh. Typus/ Chicago NHMus M.Bernhauer Collection/ Holotype Oedichirus bullaglaber Herman. ’’ Deposited in the Field Museum of Natural History.

PARATYPES: 2 males, 8 females. Brazil: Santa Catarina : Nova Teutonia, 27 ° 119B. 52 ° 239L. Fritz Plaumann , 24 2 1939, parcipennis Bernh. Typus (1 male, FMNH) ; Nova Teutonia, 27 ° 119B. 52 ° 239L. Fritz Plaumann (1 male, FMNH) ; Nova Teutonia, 300–500 m, 27 ° 119B, 52 ° 239L, January 1939, F. Plaumann (1 female, BMNH) ; Nova Teutonia, 300–500 m, 27 ° 119B, 52 ° 239L, February 1939, Fritz Plaumann (2 females, BMNH) ; Nova Teutonia, 300–500 m, 27 ° 119S, 52 ° 239W, April 1971, Fritz Plaumann (1 female, CNCI) ; Nova Teutonia, 300–500 m, 27 ° 119S, 52 ° 239W, July 1969 (2 females, CNCI) ; Nova Teutonia, Oedichirus plaumanni Brh Typ. unic. (1 female, teneral, FMNH). Santa Catarina : Linha Facao , May [1]954, F. Plaumann (1 female, CNCI) .

TYPE LOCALITY: Brazil: Santa Catarina : Nova Teutonia, 27 ° 119S, 52 ° 239W. (This locality is cited by Paynter and Traylor [1991: 414], but with slightly different coordinates: 27 ° 039S, 52 ° 249W.)

DIAGNOSIS: This species, O. bullahirtus , and O. echinatus are the only New World ones with a median point on tergum III (as on sternum VIII, fig. 73). The males of O. bullaglaber can be separated from O. bullahirtus by the rounded, asymmetrical, asetate tumescence adjacent to and proximad of the shallow emargination of sternum VIII (figs. 73, 74). On each side of the tumescence is an elliptical depression (fig. 74) the apical half of which has pale, translucent cuticle. The ventral sclerite of the aedeagus (fig. 71) has a notched posterior margin on the right side of the midline and on the right near the subapical lateral side is a small, rounded, subapical lobe (figs. 70, 72), both of which are lacking in O. bullahirtus . Oedichirus echinatus is separated from O. bullaglaber by the bidentate labral margin and concolorous legs, which for O. bullaglaber are quadridentate and bicolored respectively.

The females of O. bullaglaber and O. bullahirtus are separated by the bicolored body of the former and the unicolored body of the latter; characters of the genital segment are similar for the two species (cf. figs. 79 and 88). The species are from Santa Catarina and São Paulo states respectively, but because the species are so similar and their distribution is unknown, caution should be observed when reporting new records based on females. Females of O. echinatus are unknown.

DESCRIPTION: Length: 8.8–10.8 mm. Length of head: 0.9–1.0 mm. Width of head: 1.2–1.4 mm. Pronotal length: 1.4–1.7 mm. Pronotal width: 1.2–1.4 mm. Elytral length: 1.0– 1.2 mm. Elytral width: 1.2–1.4 mm.

Body bicolored, reddish brown and dark reddish brown to black. Head and pronotum dark reddish brown to black. Elytra and abdomen reddish brown to dark reddish brown and with segments VII to X darker reddish brown to black. Legs bicolored, yellowish brown to pale reddish brown with dark reddish brown to nearly black femorotibial spot; femoral maculation of some individuals paler and less defined, more a dark infusion, and absent in a teneral specimen (see Remarks below).

Head about one third to two fifths wider than long (HW/HL: 1.3–1.4). Frontoclypeal ridge incomplete, separated medially. Dorsal surface without V-shaped depression; surface polished and coarsely punctate; punctation moderately dense medially and laterally and less dense basally; basal region with small impunctate, polished, median spot. Labrum quadridentate; surface without tubercle near submedial denticle.

Pronotum about a tenth to a third longer than wide (PL/PW: 1.1–1.3). Pronotum polished with scattered clusters of moderately dense, coarse punctation; submedial punctate groove moderately deep. Elytra about a tenth to a third longer than wide (EW/EL: 1.1–1.3); surface flat to slightly convex and coarsely punctate.

Abdomen evenly punctate, without subapical transverse row of punctures; segments III to VI with coarse, dense punctation; VII and VIII with less coarse punctation. Segment III without paratergite; paratergal carina extending to slightly more than half of length of segment; carina weakly developed beyond spiracle. Tergum III with median point extending from transverse basal ridge. Tergum VIII with trunctate posterior margin; transverse basal ridge with smooth margin and with apically open median point. Tergum IX with lateroapical process one to two fifths longer than midbasal length (LLaP/L9 5 1.2–1.4), moderately bent ventrally, and approximately parallel to or slightly divergent from other process; ventromedial margin without posteriorly directed spur (cf. fig. 158).

MALE: Sterna VI and VII unmodified. Sternum VIII (fig. 73) with shallow, asymmetrical median emargination; emargination about one sixteenth of length of segment, wider than deep, and with rounded basal margin; posterior margin laterad of median emargination slightly emarginate; surface with large, rounded, median tumescence proximad of emargination (fig. 74); tumescence asymmetrical, higher on right side of midline; tumescence steeply sloped on right and posterior sides and gradually sloped on left and anterior sides; tumescence with indistinct margins and surface polished, impunctate, and asetate; surface adjacent to tumescence with moderately deep, elliptical depression (fig. 74); depression with integument of apical half translucent; surface of sternum without comb or membranous margin; transverse basal ridge with median point (fig. 73). Tergum IX with process reduced to small to moderately large lobe on anterior margin of anteroventral angle. Sternum IX (fig. 75) moderately asymmetrical; anterior margin narrow, nearly truncate, and with short, membranous, median notch; posterior margin wide, broadly and shallowly rounded; right lateral margin broadly curved, left lateral margin slightly sinuate.

Aedeagus asymmetrical (figs. 70–72). Ventral sclerite with broad, moderately deep depression of apical third, with small, round- ed ridge on right side near lateral margin (fig. 71), and with small tumescence near right lateral margin; posterior margin of ventral sclerite with rounded notch to right side of midsagittal line (fig. 71); notch filled with membrane; ventral sclerite without apicoventral process extending from posteri- or margin. Parameres moderately wide basally and tapered and slender apically; parameres with basal half of right and third of left fused to median lobe and both free of median lobe apically. Internal sac (figs. 77, 78) membranous to near apex; apical region with various types of spinelike armature; dorsal surface with isolated, slender spurlike process subapically (fig. 77); apical region with large cluster of spinelike and scalelike processes; most of dorsal, ventral, and lateral apical surfaces densely covered with spinelike (fig. 78) and scalelike processes (figs. 77); ventral surface with one stout, curved process on right side (fig. 77) and small scalelike processes surrounding gonopore (fig. 77).

FEMALE: Sternum VIII with irregularly sinuate transverse basal ridge; posterior margin rounded. Tergum IX with anteroventral angles separated (fig. 76). Median gonocoxal plate anteriad of vulvar plate large, wide and trapezoidal medially (fig. 76); anterior margin slightly rounded to truncate medially then gradually sloped lateroposteriorly; gonocoxal plate posteriad of vulvar plate gradually tapered to broadly rounded posterior margin and margin with or without small median lobe. Vulvar plate embedded in anteromedial region of gonocoxal plate (fig. 76). Anterior vulvar lobe (fig. 79) transverse, posterior margin contiguous with anterior margin of posterior lobe and extending along part of right lateral margin; surface smooth to slightly wrinkled and without ornamentation except laterally adjacent to margin of posterior vulvar lobe. Posterior vulvar lobe transverse and slightly oval (fig. 79); surface covered with cobble. Vulva oriented on longitudinal axis.

ETYMOLOGY: The name is from the Latin bulla, ‘‘boss or knob,’’ and glaber, ‘‘hairless or bald,’’ and refers to the absence of setae on the subapical tumescence of sternum VIII of the male.

DISTRIBUTION: Known only from two localities in Santa Catarina state, Brazil (fig. 40). For one site, Nova Teutonia, coordinates are included on the label and the place is cited by Paynter and Traylor (1991: 414). The other, Linha Facao, was not found.

REMARKS: The body is bicolored, the head, prothorax, and abdominal segments VIII to X are black to dark reddish brown and the elytra and abdominal segment III to VI are bright reddish brown, for all the specimens but two, a pale teneral specimen and a dark reddish-brown one.

The teneral female is pale reddish brown, the head and prothorax are slightly darker than abdominal segment III to VI, segments VII to X are slightly darker and are approximately the color of the head and prothorax. The elytra are paler reddish brown, almost yellowish brown. The legs are unicolorous yellowish brown and lack the femorotibial spot. For the dark reddish-brown specimen the head and prothorax are black, the elytra reddish brown, and the abdomen dark reddish brown with apical infusions of paler reddish brown. Features of tergum and sternum VIII and the genital segments of these two specimens agree with those of the other six females of the species.

Because all the males and females (but one) were collected from the same locality and same collector, and all have the same color pattern of the body and legs (except the teneral specimen), and all have a median point on tergum III, the females cited in this species account are regarded to be conspecific with the males of O. bullaglaber .

The holotype and a male and a female paratype were each identified as different new species by Bernhauer.

Figures

Figs. 39–40. Oedichirus species. Distribution. 39. Mesoamerica and the Caribbean. 40. South America. (Species described prior to present work preceded with *. Symbols ³ or ♀ signify species known only by the sex indicated. Open circle denotes multiple collecting sites.)

Figs. 70–76. Oedichirus bullaglaber. 70. Aedeagus, right lateral. 71. Aedeagus, ventral. 72. Aedeagus, left lateral. 73. Sternum VIII, male. 74. Sternum VIII, setae removed, male. 75. Sternum IX, male. 76. Segment IX, ventral, female.

Figs. 77–78. Oedichirus bullaglaber. 77. Aedeagus, internal sac, everted, ventral (CLSM). 78. Aedeagus, internal sac, everted, right lateral (CLSM).

Fig. 79. Oedichirus bullaglaber. Segment IX, vulvar plate enlarged (CLSM).