Aleochara (Xenochara) leivasorum Buss & Caron, 2023

Buss, Bruna Caroline & Caron, Edilson, 2023, Revision of Brazilian species of Aleochara Gravenhorst of the subgenus Xenochara Mulsant & Rey (Coleoptera: Staphylinidae: Aleocharinae), Zootaxa 5330 (4), pp. 509-534 : 527-529

Aleochara (Xenochara) leivasorum Buss & Caron , sp. nov.

( Figures 8 , 22 , 85 – 92 , 95 )

Type material. Holotype, ♁, deposited in CESP, with labels: (1) “ BRASIL: Paraná,\ Campina Grande do Sul,\ 25º17’47.54’’S, 49º\2’12.21’’W, FIT, 15.X.2012,\F.W. T. Leivas (leg.)” [white label, printed in black]. 10 paratypes (3 ♁♁ and 7 ♀♀). 1 ♀ deposited in CESP with the same label of the holotype. 2 ♀♀, CESP, with labels: (1) “ BRASIL, Paraná, Campina\ Grande do Sul,\25º17’47.39’’S,49º2’12.38’’\W, FIT c/orgânico-\08/V/2014 F.W. T. Leivas\ (leg.)” [white label, printed in black]. 1 ♁ and 2 ♀♀, CESP, labels: (1) “ BRASIL, Paraná, Campina \ Grande do Sul,\25º17’47.39’’S,49º2’12.38’’\W, FIT - c/ orgânico\14/I/2014 F.W. T. Leivas \ (leg.)” [white label, printed in black]. 1 ♁ and 1 ♀, MNRJ, labels: “ BRASIL, Paraná, Campina \ Grande do Sul ,\25º17’47.39’’S,49º2’12.38’’\W, FIT — Área Poço \04/XII/2013 F.W. T. Leivas \ (leg.)” [white label, printed in black]. 1 ♁ and 1 ♀, MZUSP, labels: (1) “ BRASIL, Paraná, Campina \ Grande do Sul ,\25º17’47.39’’S,49º2’12.38’’\W, FIT - c/ orgânico\26/I/2014 F.W. T. Leivas \ (leg.)” [white label, printed in black].

Additional material. 14 specimens, CESP, Brazil, Paraná, Campina Grande do Sul , 25°17’47”S 49°2’12”, 14.XI.2012 to 26.I.2014, FIT, F.W. T. Leivas, col. 3 specimens, CESP, Brazil, Paraná, Tibagi, Parque Estadual do Guartelá , 24°33’49.55”S 50°15’34.97”W, FIT, M. Catarino and A. Tishechkin, col. 3 specimens, CESP, Brazil, Paraná, Ponta Grossa, Parque Estadual Vila Velha, 14–16.VIII.2009, Pitfall, Grossi and Parizotto, col.

Diagnosis. Aleochara (X.) leivasorum sp. nov. differs from Aleochara (X.) by abdominal segments VII and VIII similar in color to the rest of the abdomen ( Fig. 8 ); the male sternum VIII has posterior margin broadly round ( Fig. 87 ); and female sternum VIII has posterior margin deeply emarginate ( Fig. 88 ).

Description. Male. Maximum body length 6.0 mm, maximum elytral width 1.5 mm. Body dark brown with appendages (antenna: antennomeres 1 and 2 only) and elytra (except anteromedial and posterolateral regions) lighter ( Fig. 8 ). Body dorsal surface glossy; pubescent, appearing yellowish-brown in artificial light, setigerous pores impressed. Head: circular. Pubescence directed anterad. Eyes large and slightly prominent, twice the length of temples. Ventral surface of head with a very short carina on each side of midline. Neck absent. Antenna reaching base of elytra; antennomere 1 subequal in length to antennomere 2 and 3 ( Fig. 22 ); antennomeres 4 and 5 sligthly longer than wide; antennomeres 6 – 10 wider than long, gradually increasing towards apex; antennomere 11 two times longer than wide; antennomeres 1 – 4 glossy with some long black setae; antennomeres 5 – 11 covered by very short white setae, with some long black setae on apex each antennomere; antennomere 11 with long black setae on a transverse circular line at the apex of basal one-third of the antennomere. Labrum transverse; anterior margin with a-sensilla and b-sensilla long. Mandibles symmetrical, without internal teeth. Maxillary palpomeres 2 and 3 about the same length; palpomere 4 about three-fourths length of 3. Gular plate broad. Pronotum transverse, posterior margin broadly curved; densely pubescent, with pubescence directed posterad and laterad elsewhere. Elytra shorter than pronotum; the same width with pronotum; elytra wider than long; densely pubescent, pubescence directed posterad; each posterolateral margin kindly rounded. Hind wings developed. Mesoventrite completely carinate; mesoventrite process somewhat sharp and longer than metaventrite process, both joined. Abdomen: distinctly narrowed posteriorly. Pubescence sparse directed posterad. Tergum VIII with posterior margin emarginate and slightly serrate (around 20 small teeth) ( Fig. 85 ). Sternum VIII with posterior margin broadly round ( Fig. 87 ). Aedeagus elongate ( Figs. 89 – 91 ); median lobe of the aedeagus with apex strongly curved directed ventrad in lateral view. Female: similar to male, except for tergum VIII with posterior margin deeply emarginate in U-shaped ( Fig. 86 ). Sternum VIII with posterior margin deeply emarginate ( Fig. 88 ). Spermatheca L-curved and irregularly twisted duct ( Fig. 92 ).

Geographic notes. Brazil: Paraná (Campina Grande do Sul, Ponta Grossa and Tibagi) ( Fig. 95 ).

Etymology. A commemorative name, that leivas - is a family name, and - orum treated the name as noun in the genitive case, plural. The name is in honor of Dr. Fernando W.T. Leivas and his family (Mr. Jo„o, Mrs. Gema and Mr. Peterson Leivas), owner of the area where the holotype was collected.

Biological notes. The specimens of Aleochara (X.) leivasorum sp. nov. can be collected using intercepting flight traps (FIT) and pitfall traps baited with human feces.

Figures

FIGURE 95. Map of Brazilian records for some species of Aleochara (Xenochara): A. (X.) taeniata and A. (X.) leivasorum.

FIGURES 1–8. Dorsal view of Brazilian species of Aleochara (Xenochara). 1) A. (X.) puberula; 2) A. (X.) verberans; 3) A. (X.) simulatrix; 4) A. (X.) taeniata; 5) A. (X.) capitinigra sp. nov.; 6) A. (X.) repetita; 7) A. (X.) lapidicola; 8) A. (X.) leivasorum sp. nov. Scales: 1.0 mm.

FIGURES 15–22. Antennae of Brazilian species of Aleochara (Xenochara). 15) A. (X.) puberula; 16) A. (X.) verberans; 17) A. (X.) simulatrix; 18) A. (X.) taeniata; 19) A. (X.) capitinigra sp. nov.; 20) A. (X.) repetita; 21) A. (X.) lapidicola; 22) A. (X.) leivasorum sp. nov. Scales: 0.6 mm.

FIGURES 85–92. Terminalia of Aleochara (Xenochara) leivasorum sp. nov. 85) Tergum VIII, male; 86) Tergum VIII, female; 87) Sternum VIII, male; 88) Sternum VIII, female; 89) Median lobe of aedeagus, dorsal view; 90) Median lobe of aedeagus, ventral view; 91) Median lobe of aedeagus, lateral view; 92) Spermatheca. Scales: 0.6 mm (Figs. 85–88), 0.5 mm (Figs. 89–91), 0.15 mm (Fig. 92).