Oedichirus batillus, 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 : 40-44

Oedichirus batillus , new species Figures 40 , 48–55

TYPE MATERIAL: Holotype: Male. ‘‘ Brazil: Para ; Aldeia Aracu, Igarape, Gurupu-Umu, Maranhao, 50 km E of Caninde. Leg: B. Malkin / forest sweep, V: 1963/ Holotype Oedichirus batillus Herman. ’’ Deposited in the Field Museum of Natural History. (Right antennomeres 3–11 are missing.)

PARATYPES: 2 males, 5 females. Brazil: Pará (5 Maranhão, not Pará): Same data as holotype (2 females, FMNH) ; Pará: Belem (01 ° 279S, 48 ° 289W), IPEAN, III-23-1970, J.M. & B.A. Campbell (1 male, CNCI), III-17-1970 (1 female, CNCI) ; XII-1–4-1969 (1 female, CNCI) ; Pará: Belem, Utinga (01 ° 269S, 48 ° 269W), III- 27–28-1970, J.M. & B.A. Campbell (1 male, CNCI) ; Pará: 8 km E Belém, Ananindéua (01 ° 229S, 48 ° 229W), April 20–29, 1973, R.T. Schuh (1 female, AMNH). (Coordinates for Belem are from Paynter and Traylor, 1991: 66; those for Utinga and Ananindéua are courtesy of A. Asenjo, personal commun.)

TYPE LOCALITY: Brazil: Maranhão (not Pará): Aldeia Aracu (5 Yararuhu?), Igarape Gurupi- Una, Rio Gurupi, 50 km E of Caninde (2 ° 349S, 46 ° 029W). (The type locality cited in this paragraph is a revision of the locality data on the label accompanying the holotype [see above Type Material: Holotype]. Oliviera [2006: 123] published a new species of a euglossine bee, some specimens of which were collected by Borys Malkin from ‘‘ Aldeia Yararuhu [Aracu], Igarape Gurupi-Una, Rio Gurupi’ ’ and are deposited in the AMNH. Oliviera cited the locality in Pará and did not include ‘‘ Maranhao, about 50 km E of Caninde’ ’ with the data he published for these specimens, but those data are on the locality labels attached to the specimens. Caninde is in Pará on the shore of Rio Gurupí ; the other side, the east side, of the river is Maranhão state, so 50 km east of Caninde is in Maranhão, not Pará. The

geographical coordinates included here are estimates of the collecting site based on ‘‘air’’ distance using Google Earth.)

DIAGNOSIS: Oedichirus batillus can be distinguished from all other New World species except O. bicristatus , O. hamatus , O. isthmus , O. optatus , and O. sinuosus by the presence of paratergite III. Of the preceding six species, five have unicolorous legs; the sixth, O. hamatus , has a dark tibiofemoral spot. The male of O. batillus can be separated from the remaining four species that possess paratergite III, and all other New World species, by the flattened spot bordered laterally and posteriorly by a dense cluster of long setae on sternum VI (fig. 54), the broad, deep, symmetrical emargination of sternum VIII (fig. 53), and the long slender parameres and broad, flattened apical third of the median lobe of the aedeagus (figs. 48– 50). Sternum VIII of O. isthmus and O. sinuosus have either a transverse cluster (fig. 163) or comb (fig. 203) of spiniform setae and the parameres (figs. 161, 200) are short, slender, thornlike, and free of the median lobe, except at the base. Sternum VIII of O. bicristatus has dense clusters of spiniform setae on each side of the midline and the posterior emargination is short and wide (fig. 59). Sternum VIII of O. optatus has a deep, narrow emargination (fig. 193).

Among the females known for the six aforementioned species, the median gonocoxal plate is nearly symmetrical in O. batillus (fig. 52), but strongly asymmetrical for O. optatus (fig. 195). For O. hamatus , part of the ventromedial edge of tergum IX extends ventrally as a strong, flat spur (fig. 158) that is lacking in O. batillus . Furthermore, the anterior vulvar lobe of O. batillus is smooth and covered with moderately long cuticular processes or fimbriae and the surface of the posterior vulvar lobe is cobbled (fig. 55), whereas the anterior vulvar lobe of O. hamatus is strongly wrinkled and the surface of the posterior lobe is reticulate (fig. 159). Females are unknown for O. bicristatus , O. isthmus , and O. sinuosus , but the males of those species and O. batillus are reddish brown with dark reddish brown abdominal segments VII to X, whereas the terminal segments of O. optatus and O. hamatus are concolorous with the remainder of the abdomen.

DESCRIPTION: Length: 7.2–7.4 mm. Length of head: 0.6–0.7 mm. Width of head: 0.9–1.0 mm. Pronotal length: 1.2 mm. Pronotal width: 1.0 mm. Elytral length: 0.9 mm. Elytral width: 1.0 mm.

Body reddish brown with darker reddishbrown infusions; segments VII to X darker reddish brown than remainder of body. Legs concolorous, dark yellowish brown, without darker femorotibial spot.

Head about half wider than long (HW/HL: 1.4–1.5). Frontoclypeal ridge incomplete, separated medially. Dorsal surface without V-shaped depression; surface coarsely punctate; punctation moderately dense medially and sparse laterally; basal two fifths polished and largely impunctate, with only scattered punctures. Labrum quadridentate; denticles small to minute and easily overlooked; submedial denticle larger than sublateral; surface without tubercle near submedial denticle.

Pronotum about two fifths longer than wide (PL/PW: 1.2). Pronotum polished and coarsely punctate; punctation arranged in scattered, dense clusters; surface with submedial punctate groove extending posteriorly from near middle. Elytra with length about one to two tenths less than width (EW/EL: 1.1–1.2); surface slightly convex and coarsely punctate.

Abdominal segments III to VI with coarse, irregular punctation basally, segments V and VI with irregular, subapical transverse row of punctures; segments VII to VIII with less coarse and less dense punctation. Segment III with narrow paratergite extending from base to posterior margin. Tergum III without median point extending from transverse basal ridge. Tergum VIII with posterior margin feebly emarginate, trunctate, or feebly round- ed; transverse basal ridge coarsely and irregularly serrate, broadly curved anteriorly, and without median point. Tergum IX with lateroapical process about a tenth shorter to nearly a third longer than midbasal length (LLaP/L9 5 0.9–1.3), slightly bent ventrally, and approximately parallel to other process; ventromedial margin without posteriorly directed spur (cf. fig. 158).

MALE: Labral surface without tubercle between denticles. Sternum VI with subapical, slightly flattened, polished, median spot bordered laterally and posteriorly by dense cluster of long, erect setae (fig. 54). Sternum VII with or without shallow median emargination of posterior margin. Sternum VIII with broad, deep emargination (fig. 53); emargination symmetrical, about one third of length of segment, wider than deep, and with basal margin rounded; surface adjacent to base of emargination beveled; surface without comb, tumescence, short and stout setae, cluster of setae, or hyaline edge of posterior margin. Tergum IX with lateroapical process about a tenth shorter than midbasal length of tergum IX (LLaP/L9 5 0.9); ventromedial margin without posteriorly directed spur (cf. fig. 158). Tergum IX with anteroventral angle extended anteriorly as moderately large process. Sternum IX (fig. 51) moderately asymmetrical; anterior margin wide and emarginate; posterior margin broadly rounded; right lateral margin broadly convex, left lateral margin slightly sinuate.

Aedeagus asymmetrical (figs. 48–50). Ventral sclerite broadly and shallowly depressed; apical third broad in ventral view and flattened in lateral view (figs. 48, 50); apical margin of dorsal sclerite rounded and slightly produced medially and apical margin of ventral sclerite emarginate (fig. 49); ventral sclerite with large carina beginning near middle of right edge and extending, adjacent to lateral margin, posteriorly to near apex (figs. 48, 49) and left side with low ridge of similar length (fig. 50); ventral sclerite without apicoventral process extending from posterior margin; carina of right side bisinuate in lateral view (fig. 48). Parameres long, slender, with base fused to median lobe and with apical half free of median lobe.

FEMALE: Sternum VIII with posterior margin slightly to moderately lobed medially. Tergum IX with lateroapical process about one fifth to nearly one third longer than midbasal length of tergum IX (LLaP/L9 5 1.2–1.3); anteroventral angles separated from each other (figs. 52, 55). Median gonocoxal plate anteriad of vulvar plate narrow and straplike and anterior margin strongly round- ed medially (figs. 52, 55); gonocoxal plate posteriad of vulvar plate (fig. 52) wide and long and tapered to broadly rounded posterior margin; posterior margin with or without small median lobe. Vulvar plate embedded in median gonocoxal plate anteriorly (fig. 52). Anterior vulvar lobe large, embracing anterior and part of lateral margins of posterior vulvar lobe; surface moderately densely covered with long cuticular fimbriae (fig. 55). Posterior vulvar lobe rounded and smaller than anterior vulvar lobe; surface covered with cuticular microlobes, but for patch of small cuticular processes on anterior left side (fig. 55). Vulva of indeterminate orientation.

ETYMOLOGY: The name of this species is from the Latin batillum, ‘‘shovel,’’ and refers to the wide, flattened apical portion of the aedeagus.

DISTRIBUTION: The species is known only from the Brazilian states of Maranhão and Pará (fig. 40).

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. 48–53. Oedichirus batillus. 48. Aedeagus, right lateral. 49. Aedeagus, ventral. 50. Aedeagus, left lateral. 51. Sternum IX, male. 52. Segment IX, ventral, female. 53. Sternum VIII, male.

Figs. 54–55. Oedichirus batillus. 54. Sternum VI, male (CLSM). 55. Segment IX, vulvar plate and part of median gonocoxal plate, enlarged (CLSM).