Leptochirus (Tropiochirus) pachoensis Bernhauer, 1917

Asenjo, Angelico & Ribeiro-Costa, Cibele S., 2013, Revision of the neotropical subgenus Tropiochirus of the genus Leptochirus Germar 1824 (Coleoptera: Staphylinidae: Osoriinae), Journal of Natural History (J. Nat. Hist.) 47 (19 - 20), pp. 1257-1285 : 1272-1274

publication ID	https://doi.org/ 10.1080/00222933.2012.763053
publication LSID	lsid:zoobank.org:pub:9A2DDE88-71E2-4E28-90AC-D542DABAAF66
DOI	https://doi.org/10.5281/zenodo.10536478
persistent identifier	https://treatment.plazi.org/id/953B87C0-0E56-2D29-FEF5-A265BCFADF72
treatment provided by	Felipe
scientific name	Leptochirus (Tropiochirus) pachoensis Bernhauer, 1917
status

Treatment

Leptochirus (Tropiochirus) pachoensis Bernhauer, 1917 View in CoL

( Figures 2E View Figure 2 , 3E View Figure 3 , 5 View Figure 5 , 6G–L)

Leptochirus (Tropiochirus) pachoensis Bernhauer, 1917: 47 View in CoL [original description, comparison with L. (T.) proteus Fauvel, 1864 View in CoL . Type locality: “Westkolumbien: Pacho in den Ostkordilleren, 2000 m ”]; Scheerpeltz, 1933: 1000 [world catalog].

Leptochirus pachoensis Blackwelder, 1944: 110 View in CoL [checklist from Neotropical region]; Herman, 2001: 1105 [world catalog]; Newton, Gutiérrez and Chandler, 2005: 30 [checklist from Colombia].

Type material. Leptochirus (T.) pachoensis . Holotype (female): “Pacho Col. [ Colombia] / dh.es will / 2000 m oklis” “Columbia occ.[western] / cali, Fassl” “pachoensis / Bernh. Typus unic” “Chicago NHMus / M.Bernhauer / Collection” ( FMNH). Note: In the original description, Bernhauer (1917) specified that he studied one specimen. We received from the FMNH a female with the label “Typus”, therefore the specimen is the holotype for the species.

Additional specimens

ECUADOR. Napo: 2 km south from Oritoyacu and 22km south from Baeza , 1500 m, 4-5-iii.1971, J. M. Campbell (1 male CNC) ; idem 4-5-iii.1976 (1 female ZMHB) ; COLOMBIA. Distrito Capital : Bogotá (1 female ZMHB) ; Nueva Granada (1 male DZPU, 1 female ZMHB) .

Diagnosis

Leptochirus (T.) pachoensis and L. (T.) helleri have the accessory tooth of the left mandible far from the lateral longitudinal ridge ( Figure 3A, E View Figure 3 ), but L. (T.) pachoensis can be distinguished by the first dorsal tooth of the left mandible bifurcate ( Figure 3E View Figure 3 ).

Description

BL: 14.73; BW: 2.46

Body strongly depressed. Body all black except tarsi red-brown.

Head. Transverse ( Figure 2E View Figure 2 ). Inner lateral teeth separated by a depression extending to base. Inner and outer lateral teeth fused and resembling a septum; median sulcus deep, sides of median sulcus parallel; laterofrontal depressions oval. Labrum with outer edge strongly angled and lateral-apical edge concave. Mandibles ( Figures 2E View Figure 2 , 3E View Figure 3 ) with lateral longitudinal ridge occupying less than two-thirds of apical region; external margin strongly developed, attenuated anteriorly. Left mandible ( Figure 3E View Figure 3 ) with first dorsal tooth developed, straight and bifurcate, accessory tooth far from lateral longitudinal ridge; second dorsal tooth little developed and resembling a small hill; first ventral tooth with tooth accessory pointed. Submentum with setae arranged in row on anterolateral margin.

Thorax. Pronotum ( Figure 2E View Figure 2 ) a little wider than long (PL: 2.54; PW: 2.98); superior marginal line of hypomeron not interrupted, not bent to dorsal region at anterior margin and bent to slightly dorsal region at posterior margin; without pair of small depressions near basal constriction. Inferior marginal line of hypomeron reaching anterior margin. Apex of prosternal process strongly expanded and resembling a circular plate, extending considerably beyond the lateral process of hypomeron. Metaventrite with microsculpture longitudinally undulate in median region and with small longitudinal median depression near posterior edge. Mesoscutellum with apex rounded. Elytra longer than broad and without pair of small depressions on posterior-lateral edge (EL: 3.27, EW: 2.95).

Abdomen. Cylindrical. Sternite III with keel of apex rounded. Tergite IX ( Figure 6J) sclerotized with left and right plates separated, each with six or seven setae of various lengths. Tergite X ( Figure 6J) membranous except for sclerotized apical part, with two pairs of long apical setae.

Male. Sternite IX ( Figure 6K) composed of two plates, distal plate sclerotized except for membranous apex, anterior margin rounded, posterior margin sinuated and with two long setae; proximal plate less sclerotized, greater than apical, broadened in middle and with a projecting angle at posterior border. Aedeagus ( Figure 6G–I) with median lobe slightly bulbous at base, pointed at apex, weakly sclerotized on dorsal side and a small plate sclerotized on ventral side; parameres short, fused dorsally.

Female. Similar to male, except for the gonocoxites divided longitudinally ( Figure 6L). The distal plate with apex membranous and long seta; proximal plate with the posterior region pointed.

Distribution

Leptochirus (T.) pachoensis is currently known from Colombia. In the current study this species is listed from Ecuador ( Figure 5 View Figure 5 ).