Aleochara chrysorrhoa Erichson, 1839

Caron, Edilson, Moussallem, Marcelo & Bortoluzzi, Sidnei, 2019, Revision of Brazilian species of Aleochara Gravenhorst of the subgenus Aleochara (Coleoptera: Staphylinidae: Aleocharinae), Zootaxa 4712 (1), pp. 1-33 : 20-23

Aleochara chrysorrhoa Erichson, 1839

( Figs. 6 , 55–64 , 75 )

Aleochara chrysorrhoa Erichson, 1839: 160 (description, type locality: “Brasilia”). Feynes 1918: 400 (catalogue). Bernhauer & Scheerpeltz 1926: 776 (catalogue). Blackwelder 1944: 167 (checklist). Klimaszewski et al., 1987: 250 (redescription; lectotype designation). Caron et al., 2008: 832 (checklist).

Type material: Type not studied. Note: lectotype deposited in ZMHB ( Klimaszewski et al. 1987).

Additional material: IRSNB: One specimen: (1) “Coll. R. I. Sc. N. B.”. Brazil: One specimen: (1) “ Espirito Santo \ Brésil”; (2) “Coll. R. I. Sc. N. B.” . DZUP: Brazil: Two specimens: (1) “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.). Two specimens: (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.). Three specimens: (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.). Six specimens: (1) “ BRASIL, PR, Foz do Iguaçu\ Parque Nacional do Iguaçu\ (Pitfall)\ 29-XII-2010 \ M. R. Silva, col.” . MHNCI: Brazil: One specimen: (1) “S. J. dos PINHAIS PR \ (GUARICANA)\ 26. IV. 1985 \ S. MALKOWSKI leg”; (2) “SC”; (3) “ CAPÃO \ IMBUIA\ PR ” .

Diagnosis: Aleochara chrysorrhoa is similar to A. bonariensis and differs from it by tergum VIII of male distinctly serrate on posterior margin, around of 13 teeth; apex median lobe of aedeagus with a short tooth (directed ventrad); and female with elongate capsule of spermatheca.

Redescription: BL: 8.0 mm. EW: 2.2 mm. Body dark brown, with tarsi, maxillary palpi, basal antennal segments and apical part of abdomen rust-brown. Dorsal surface glossy and covered with thin golden yellowish setae and setigerous pores impressed.

Head: with coarse setigerous punctutation; disc with sparse pubescence directed mediad and anterad. Antennae with antennomere 2 half length of first and slightly narrower than first; 3 longer than 2; 4 subquadrate to slightly transverse; 5–10 similar in shape, distinctly transverse, 10 slightly narrower than 9; 11 twice longer than the previous one, semi-triangular in shape; 1–4 glossy with some long black setae; 5–11 dull and covered by very short white setae, with some long black setae on apex of each antennomere and in 11 with long black setae on a transversal circular line in the middle of the antennomere.

Thorax: pronotum with setigerous punctuation; setae directed posterad at the midline of the disc, directed laterad in each anterior half, and posterad and laterad in each posterior half. Mesoventral process truncate apically. Elytra with setigerous punctuation, denser than pronotum; setae directed posterad.

Abdomen: distinctly narrowed posteriorly, with maximum width of tergum X about one-third of apical width of tergum VII; terga with coarsely setigerous punctation, similar to head, sparse pubescence directed posterad.

Male: tergum VIII as wide as long; posterior margin emarginate at the middle, coarsely serrate, with about 13 teeth ( Fig. 55 ). Sternum VIII as wide as long; posterior margin truncate ( Fig. 56 ). Tergum IX with asymmetrical ventral struts, the left shorter than the right one, the left with one accessory short arm directed laterad. Tergum X with anterior and posterior margin truncate, but withweakly sclerotized area at the middle ( Fig. 57 ); aedeagus: median lobe elongate with bulbous base ( Fig. 59 ); apex with a short tooth, somewhat hook-like, directed ventrad ( Fig. 60 ).

Female: tergum VIII as wide as long; posterior margin slightly emarginate at the middle ( Fig. 61 ). Sternum VIII as wide as long; posterior margin broadly rounded, somewhat truncate at the middle, with short setae restricted to posterior margin ( Fig. 62 ). Tergum IX with very short and symmetrical ventral struts. Tergum X with anterior margin somewhat curved and posterior margin very slightly emarginated at the middle ( Fig. 63 ). Spermatheca long, somewhat in L-shaped, and without apical invagination ( Fig. 64 ).

Taxonomic note: in the original description of A. chrysorrhoa, Erichson (1839) was not clear if he examined a male, or a female, or both, because he only described the color of abdominal apex, and not the shape of the tergum VIII (important for sex identification). Klimaszewski et al. (1987) redescribed the species based on one female, the type material of species deposited in the Museum für Naturkunde der Humboldt-Universität (ZMHB, Berlin, Germany), where the Erichson's collection is housed. Therefore, here we described for the first time the characteristics of male, including the sexual dimorphism.

Geographical records: Examined material: Brazil (Espírito Santo; Paraná: Campina Grande do Sul, Foz do Iguaçu and São José dos Pinhais) ( Fig. 75 ). Literature: Brazil ( Erichson 1839).

Natural history: Some specimens were collected using FIT and pitfalls.

Figures

FIGURE 75. Map of distribution of Brazilian species of Aleochara (Aleochara).

FIGURES 1–7. Dorsal habitus of Brazilian species of Aleochara (Aleochara). (1) A. auricoma; (2) A. mundana; (3) A. prisca; (4) A. bugnioni; (5) A. lustrica; (6) A. chrysorrhoa; (7) A. bonariensis.

FIGURES 55–60. Morphologic structures of A. chrysorrhoa, male (55) Tergum VIII, dorsal view; (56) Sternum VIII, ventral view; (57) Terga IX–X, dorsal view; (58) Paramere; (59) Aedeagus, dorsal view; (60) Aedeagus, lateral view.

FIGURES 61–64. Morphologic structures of A. chrysorrhoa, female (61) Tergum VIII, dorsal view; (62) Sternum VIII, ventral view; (63) Terga IX–X, dorsal, view; (64) Spermatheca.