Aleochara auricoma Sharp, 1876

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 : 3-7

Aleochara auricoma Sharp, 1876

( Figs. 1 , 8–16 , 75 )

Aleochara auricoma Sharp 1876: 70 . (Description, type locality: “Ega”), note: Ega is currently known as Tefé, a municipality in Amazonas state, Brazil. Duvivier 1883: 99 (catalogue). Feynes 1921: 416 (catalogue, as “species of doubtful systematic position”). Bernhauer & Scheerpeltz 1926: 776 (catalogue). Blackwelder 1944: 167 (checklist). Caron et al., 2008: 831 (checklist). Fery 2013: 81 (checklist).

Type material: Syntype: One male specimen ( Fig. 1 ), deposited in BMNH: (1) “ Aleochara \ auricoma Type\ amazons.\ D.S.” [white label, handwritten]; (2) “Type” [circular label, white with red boards, printed in black]; (3) “Ega.” [circular label, green, handwritten]; (4) “ S. America:\ Brazil ” [white label with median longitudinal line in green, printed in black]; (5) “Sharp Coll\1905-313.” [white label, printed in black] .

Note: Sharp described the species based on two specimens, syntypes.

Additional material: DZUP: Brazil: One specimen: (1) “BRASIL, ACRE, PORTO \ ACRE, RESERVA\ HU- MAITA, 8-X-2006 \ MIELKE & CASA-\GRANDE LEG.”; (2) “Em isca de peixe\ em decomposição”. One specimen: (1) “ BRASIL, ACRE, SENADOR\ GUIOMARD, REVERVA\ CATUABA, 6-7 – X – 2006 \ MIELKE & CASA-GRANDE\ LEG; (2) “Em isca de peixe\ em decomposição”. Seven specimens: (1) “ BRASIL, Acre, Porto Acre \ Reserva Humaitá\ S 09° 73’ W 67° 68’\ 20-30.I.2009 \ Mielke & Casagrande (col.)”. 23 specimens: (1) “Brasil, Acre, Rio Branco\ 10°01’49.8”S;\ 67°41’00.4”W, iii-iv.2016.\ Pitfall c/ fezes humanas\ ou coração bovino ou\ banana fermentada\ W.P.Sutil & F.A.Oliveira \ (leg.)” . FMNH: Brazil: One specimen: (1) “ S. America \ Brazil ”; (2) “Sharp Coll.\1905-313”; (3) “Compared with\ Type \ Aleochara \ prisca\ Shp.”; (4) “Chicago Nat. Hist.\ (ex. D. Sharp Colln. \ by exchange with\ Brit. Mus. Nat. Hist.)”; (5) “FMNHINS\ 2840579\ FIELD MUSEUM \ Pinned ” .

British Guiana: One specimen: (1) “British Guinana:\ Essequibo R.,\ Morabali Creek.”; (2) “ 29.viii.1929.\ Oxf. Univ.Expedn\ B.M.1929-485.”; (3) “ Aleochara \ mundana\ Shrp” (4) “FMNHINS\ 2840586\ FIELD MUSEUM \ Pinned”. INPA: Brazil: One specimen: (1) “Brasil—AM, Manaus\ Reserva Adolpho Ducke\ 10-16/VII/2008 \ K.M.Mise (Leg.)”; (2) “Armadilha Pit-Fall\ Isca carcaça suína”. One specimen: (1) “5597”; (2) “ BRASIL: Para \ Tucuri VILA BRAVA \ 15-VII-1980 \ eq. Nunes de Mello”. One specimen: (1) “5632”; (2) “ BRASIL: Para \ Tucuri PURAQUEQUARA\ 13-VII-1980 \ eq. Nunes de Mello”. One specimen: (1) “Brasil: Am\ Manaus\ C. Univ ICB\ 21-27/ V /1988 \ M.C.Castilho\ E. Bindá, col.”; (2) “Armadilha de Shannon”. One specimen: (1) “ BRASIL: Amazonas\ Campus Universitario\ Manaus, 11-19/VIII/1988 ”; (2) “Marcia Castilho\ J. Elias Binda\ ARM. Shannon\ ISCA: FEZES ”. MPEG: Brazil: One specimen: (1) “Brasil Pará \ Serra Norte\ ISCA CARNE \ 07-06-1983 \ Col. W. FRANÇA ”. One specimen: (1) “Belém Utinga\ 24-III-1977 ” (2) “Brasil Pará\ P Waldir”.

Diagnosis: Aleochara auricoma is very similar to A. prisca (specimens with head darker than pronotum) and differs from it by apical three-fourths of abdominal segment VII distinctly yellowish; tergum X of male with anterior margin strongly arcuate; anterior margin of tergum IX of female without a weakly sclerotized area and tergum X of female with posterior margin deeply emarginate at the middle.

Redescription: BL: 9.0 mm. EW: 2.1 mm. Head black; pronotum bright orange to brownish with dark macula on disc; elytra yellowish to brownish with small dark spot on postero-lateral angle; abdomen black with apical threefourths of tergum VIII to tergum X yellowish to brownish; antennae black or darker than pronotum, sometimes the last antennomere lighter; labial and maxillary palpus black with last palpomeres light brown to yellow; legs light brown to yellow. Dorsal surface glossy and covered with thin golden yellowish setae with setigerous pores impressed.

Head: coarsely setigerous punctation; disc with sparse pubescence directed mediad and anterad. Antennae with antennomere 2 half the length of first and slightly narrower than first; 3 longer than 2; 4 subquadrate to slightly transverse; 5–9 similar in shape, each distinctly transverse; 10 slightly narrower than 9, slightly transverse; 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; 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 at each anterior half, and posterad and laterad at each posterior half. Mesoventral process truncate to slightly emarginate apically. Elytra with setigerous punctation, denser than pronotum; setae directed posterad. Hind wings somewhat dark.

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

Male: tergum VIII wider than long ( Fig. 8 ); posterior margin slightly arcuate, truncate at the middle, not serrate; some very short setae restricted to posterior margin, but absent near posterior angles. Sternum VIII wider than long; posterior margin broadly rounded and truncate at the middle; posterior margin with fringed area on median three-fifths, many short and dense setae directed anterad ( Fig. 9 ). Tergum IX with ventral struts asymmetrical, the left shorter than the right, the left with one accessory short arm directed laterad. Tergum X with anterior margin strongly arcuate and posterior margin slightly emarginate at the middle ( Fig. 10 ); Aedeagus: median lobe elongate in dorsal view ( Figs. 12 ); base bulbous, ventrally expanded at basal half in lateral view ( Fig. 13 ); apex acute and toothless ( Figs. 12, 13 ).

Female: tergum VIII wider than long, posterior margin slightly curved ( Fig. 14 ); some very short setae restricted to posterior margin but absent near posterior angles. Sternum VIII wider than long, but more pointed than in the male; posterior margin broadly rounded but truncate at the middle; posterior margin with fringed area on median-third, many short and dense setae directed anterad ( Fig. 15 ). Tergum IX without ventral struts. Tergum X with anterior margin truncate and posterior margin deeply emarginate at the middle ( Fig. 16 ). Spermatheca not found.

Geographical records: Material examined: Brazil (Acre, Amazonas, Pará); and British Guiana ( Essequibo) ( Fig. 75 ).

Natural history: Associated with decayed pig, fish, beef, beef heart, fruits and human feces. Some specimens were collected using Pitfall and Shannon traps.

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 8–13. Morphologic structures of A. auricoma, male. (8) Tergum VIII, dorsal view; (9) Sternum VIII, ventral view; (10) Terga IX–X, dorsal view; (11) Paramere; (12) Aedeagus, dorsal view; (13) Aedeagus, lateral view.

FIGURES 14–16. Morphologic structures of A. auricoma, female. (14) Tergum VIII, dorsal view; (15) Sternum VIII, ventral view; (16) Terga IX–X, dorsal, view.