Plaumanniola regina, Jałoszyński, Paweł, 2013

Jałoszyński, Paweł, 2013, A new species of the putatively myrmecophilous genus Plaumanniola Costa Lima, with notes on the systematic position of Plaumanniolini (Coleoptera: Staphylinidae: Scydmaeninae), Zootaxa 3670 (3), pp. 317-328 : 322-325

Plaumanniola regina sp. n.

( Figs. 3 , 5–11 , 14–15 )

Type material. Holotype: BRAZIL (state Amazonas.): 3, four labels: " BRASIL: Amazonas / São Garbriel da / Cachoeira" [white, printed]; " 17-20.iv.1982 / CDC light tr. / Eq. J. Arias" [white, printed]; " Plaumanniola / sanctaecatharinae / Costa Lima / det.H.Franz" [white, handwritten and printed]; " PLAUMANNIOLA / regina m. / det. P. Jałoszyński '13 / HOLOTYPUS " [red, printed] ( MTEC). Paratype: 1 3, same data as holotype, except for yellow " paratypus " label ( MTEC).

Diagnosis. Body longer than 2.5 mm; antennae thickened from antennomere IV; tempora much shorter than large eyes; all tibiae broadest near proximal third; each paramere with four setae.

Description. Body of male ( Fig. 3 ) moderately stout and convex, dark brown, covered with light brown vestiture. BL 2.55–2.58 mm.

Head ( Figs. 5–7 ) in dorsal view subtrapezoid, strongly flattened, broadest at posterior margin of vertex, HL 0.50 mm, HW 0.81–0.83 mm; vertex strongly transverse and only weakly, evenly convex; tempora much shorter than eyes; frons posteriorly confluent with vertex, between eyes evenly convex, between feebly marked supraantennal tubercles flattened; compound eyes large, with deeply and broadly emarginate posterior margin. Vertex and frons glossy, covered with sparse and large setiferous punctures with sharp margins, separated by spaces as long as 2– 4 x puncture diameters (denser on vertex, anteriorly becoming sparser). Setae on head dorsum sparse but long, curved and suberect, directed posteriorly. Antennae short, strongly thickening distally from antennomere IV, AnL 0.80, antennomeres as in Figs. 5–7 . All antennomeres covered densely with long, suberect setae directed towards antennal apex and with sparse, slightly more erect setae.

Pronotum distinctly more convex than head, approximately oval, broadest slightly anterior to middle; PL 0.70 mm, PW 1.13 mm. Anterior and lateral margins confluent, anterior pronotal corners not marked; anterior margin arcuate and slightly concave just behind head; lateral margins strongly rounded; posterior pronotal corners barely discernible, strongly obtuse; base of pronotum in middle strongly and abruptly projecting posterad, forming short and broad subtrapezoid lobe over base of elytra demarcated laterally by obtuse angles; posterior pronotal margin nearly straight. Punctures smaller and less distinct than those on vertex and frons, separated by spaces 4– 5 x as wide as puncture diameters; setae sparse in middle and denser on sides of pronotum, moderately long, suberect.

Elytra more convex than pronotum but slightly flattened in middle, oval, broadest in anterior third; EL 1.35– 1.38 mm, EW 1.18 mm, EI 1.15–1.17. Punctures more distinct than those on head and pronotum, shallow and small, but with distinct, sharp margins, separated by spaces 2– 3 x as wide as puncture diameters; setae similar to those on head and pronotum but slightly longer and more erect.

Legs short and robust; protibiae slightly curved inwards in distal third; meso- and metatibiae nearly straight; all tibiae broadest near proximal third, where they are strongly flattened dorso-ventrally.

Aedeagus ( Figs. 14–15 ) pear-shaped; AeL 0.55 mm; median lobe in ventral view with short subtriangular apical part; internal armature complex and partly asymmetrical; parameres in lateral view recurved, each with four setae.

Female. Unknown.

Distribution. Northern Brazil, state Amazonas.

Etymology. The large body and elegant shapes of this species deserve to be honored by a royal name regina ; Latin "queen".

Remarks. This species was misidentified as P. sanctaecatharinae and redescribed under this name by Franz (1990). His illustration of the aedeagus ( Franz 1990: Figs. 1 a–b) is relatively accurate, but in the dorsal view each paramere was figured with four setae, while in an approximately lateral view with a surprising number of seven setae. Out of six specimens originally borrowed by Franz from MTEC, according to his description ( Franz 1990), three were returned and three retained; unfortunately I was not able to find any specimens of Plaumanniola in the Franz Coll. housed at the Naturhistorisches Museum Wien, Austria, and only two specimens were found in the collection of MTEC.

Figures

FIGURES 1 – 3. Plaumanniola sanctaecatharinae Costa Lima, dorsal habitus of paratype male (1) and its original set of labels (2); Plaumanniola regina sp. n., dorsal habitus of paratype male (3).

FIGURES 4 – 5. Heads of paratype males in dorsal view. Plaumanniola sanctaecatharinae Costa Lima (4) and Plaumanniola regina sp. n. (5).

FIGURES 6 – 7. Male paratype of Plaumanniola regina sp. n. Head in anterior view (6); head and prothorax in lateral view (7).

FIGURES 8 – 11. Male paratype of Plaumanniola regina sp. n. Head in ventral view (8); prothorax in ventral view (9); pterothorax and abdomen in ventral view (10); and general view of venter (11). Abbreviations: aest 2, mesanepisternum; aest 3, metanepisternum; ai, asetose impression; ar, anterior ridge; bst, basistipes; cd, cardo; el, elytron; epm 3, metepimeron; fo, foramen occipitale; gal, galea; gen, gena; gp, gular plate; hr, hypostomal ridge; hy, hypomeron; hyr, hypomeral ridge; lac, lacinia; lhph, lateral lobe of hypopharynx; lp, labial palp; mcp, mesocoxal projection; md, mandible; mn, mentum; mscc, mesocoxal cavity; mscs, mesocoxal socket; msff, mesofurcal fovea; mst, mesostipes; msvp, mesoventral intercoxal process; mtvp, metaventral intercoxal process; mxp, maxillary palp; nr, neck region; nss, pronotosternal suture; pcc, procoxal cavity; pcs, procoxal socket; ppf, palpifer; pre, prepectus; pst, prosternum; ptp, posterior tentorial pit; smn, submentum; st 3 - 8, abdominal sternites; tg, tibial groove; v 3, metaventrite.

FIGURES 12 – 15. Aedeagus of Plaumanniola sanctaecatharinae Costa Lima (12 – 13) and Plaumanniola regina sp. n. (14 – 15) in ventral (12, 14) and lateral (13, 15) views.