Lithocharodes karinae, Irmler, 2021

Irmler, Ulrich, 2021, The Neotropical species of the genus Lithocharodes SHARP, 1876 (Coleoptera: Staphylinidae: Staphylininae: Xantholinini), Beiträge Zur Entomologie = Contributions to Entomology 71 (1), pp. 29-85 : 48-49

Lithocharodes karinae spec. nov.

urn:lsid:zoobank.org:act:067347B8-B4E1-4B17-96D3-9ADBA83D340F

Figs 23 a-d, 44 K,48 I

Type material: male, holotype: Brazil, Mato Grosso, Campo Verde, Santa Luzia farm (55°2.09'W, 15°4.33'S), forest, 0-10 depth of soil, #10, 25.3.2014, leg. K. Peña- Peña ( INPA) . Paratypes: Panama: Canal Zone , Barro Colorado Is., under bark rotting logs, 5 females, 4.2.1976, 5.2.1976, 8.2.1976, 10.2.1976, pleg. A. Newton ( FMNH) ; 2 females, wet wood, Berlese , 5.8.1969, leg. J. Lawrence, B. & T. Hlavac ( FMNH) ; female, at Fomes melanoporus , 31.7.1969, leg. J.F. Lawrence ( FMNH) ; female, at Ganoderma sp. , 31.7.1969, leg. J.F. Lawrence ( FMNH) ; Brazil: Amazonas, Manaus, Ilha Marchanteria (59°58'W, 3°15'S), Várzea, 1 male, 1 female, 22.1.1981, 16.2.1982, leg. J. Adis ( UIC) , Minas Gerais, Parque Serena de Canastra, nr. Nascimento de Rio Sao Francisco , malaise trap, female, 17.7.1997, leg. F. Perini, #BRA1F96 112 ( KNHM) ; Bolivia: Santa Cruz Dept., 3.7 km SSE Buena Vista Hotel Flory y Fauna (63°33'15"W, 17°20'95"S), secondary forest, primary forest, 400-440 m elev. flight intercept trap, 2 females, 2.-9./3.-9./4.- 9.11.2002, leg. R. Leschen, #BOL1L02-055/53/54 ( KNHM) ; Agua Clara Cementario (63°02'W, 19°04'S), from within non-epiphytic bromeliads, berlesate of soil, female, 27.4.2004, leg. A.R. Cline, J.L. Arrmayo, #BOL1 Cline 04 007.5 ( KNHM) .

Diagnosis: Lithocharodes karinae is a large black species with sparse punctation on posterior vertex. It resembles L. katharinae in dark colouration and size but the punctation on the head is sparser. In this respect, L. karinae resembles the smaller species L. nigerrima with still sparser punctation on the head. Males of both species are easy to separate by the shape of tergite VII, which has a straight posterior margin in L. nigerrima but a broad prominence in L. karinae . Moreover, the endophallus of L. nigerrima is apically bilobed and the paramere carries long basal and apical setae, whereas the endophallus of L. karinae forms a dentate band and the paramere is covered by shorter setae.

Description: Length: 5.6. Colouration: Black; legs and antennae dark brown.

Head: 0.90 mm long, 0.69 mm wide; sides slightly divergent posteriad; eyes small; postocular space approximately 3.6 times as long as eyes; interantennal furrows deep; slightly curved; reaching nearly posterior edge of eyes; setiferous punctation deep and irregularly dense; on anterior vertex, interstices shorter than diameter of punctures; on small parts nearly coriaceous; on posterior vertex, interstices at least as wide as diameter of punctures; space between interantennal furrows impunctate; vertex with impunctate midline; midline anteriorly smaller than near neck; surface without microsculpture; shiny. Antennae with first antennomere slightly longer than half-length of head; second and third antennomere longer than wide and conical; subsequent antennomeres wider than long and increasing in width; fourth antennomere 1.7 times as wide as long; tenth antennomere more than twice as wide as long; four to eleventh antennomeres densely pubescent. Pronotum: 1.01 mm long, 0.60 mm wide; widest in anterior third; anteriad, conically narrowed toward neck; posteriad, continuously narrowed; at posterior margin 0.84 times as wide as at widest part; posterior angles sub-rectangular; setiferous punctation deep; wide midline impunctate; adjacent to midline with line of approximately 17 punctures; laterally, punctation irregularly dense; on average, interstices between punctures shorter than diameter of punctures but close to anterior and posterior angles with few areas impunctate; without microsculpture; shiny. Elytra: 0.89 mm long, 0.72 mm wide; sides distinctly divergent posteriad; humeral angles sub-rectangular; posterior angles nearly rectangular; posterior margin triangularly emarginate; setiferous punctation deep and dense; partly in irregular lines; surface without microsculpture; shiny. Abdomen with dense setiferous punctation and without microsculpture; posterior margin of tergite VII of male weakly prominent medially with adjacent deep semicircular emargination; sternite VII of male with wide triangular incision. Mesotibia with three, metatibia with two subapical ctenidia. Aedeagus oval with indistinct anterior angles; endophallus straight with longitudinal torsion; covered by medium-sized teeth and two strings with slightly larger teeth; paramere with wide base; strongly narrowed toward curved apex; punctures at inner face with longer setae than at outer face.

Etymology: The species is named in honour of Karina Peña-Peña , who collected it during her PhD-studies on arable fields.

Figures

Fig. 19–24: L.-fuscipennis-group:Lithocharodesfuscipennis(19),L. bierigi(20),L. nigripennis(21),L. clavicornis(22),L. karinae (23), L. katharinae (24); aedeagus (a), paramere (b), sternite VII of male (c), tergite VII of male (d); scale bare: A–D: 0.2 mm; B: 0.1 mm.