Euconnomorphus pilosissimus Franz

Jałoszyński, Paweł, 2012, Taxonomy of ' Euconnus complex'. Part I. Morphology of Euconnus s. str. and revision of Euconnomorphus Franz and Venezolanoconnus Franz (Coleoptera: Staphylinidae: Scydmaeninae), Zootaxa 3555, pp. 55-82 : 73-74

Euconnomorphus pilosissimus Franz

( Figs. 46–58 )

Euconnomorphus pilosissimus Franz, 1980a: 207 , Fig. 194.

Material studied. Holotype: 3: four labels: "Umg. Tarapoto / Peru, lg. Franz" with "SA132" on the reverse side [white, printed; reverse handwritten], " Euconnomorphus / pilosissimus m. / det. H. Franz" [white, handwritten and printed], "3" [white, printed], " Typus " [red, handwritten] ( NHMW).

Diagnosis. This is the only known species of Euconnomorphus and can be identified on the basis of the generic characters.

Redescription. Body of male ( Figs. 46–47 ) strongly convex, elongate but moderately slender, with long appendages, BL 2.85 mm; glossy, uniformly brown with slightly lighter legs and palps; vestiture slightly lighter than cuticle.

Head ( Figs. 48–49 , 52 ) rhomboidal and elongate, broadest at eyes, HL 0.63 mm, HW 0.55 mm; occipital constriction distinctly narrower than half HL; tempora longer than eyes and gradually convergent caudad; vertex nearly as long as broad, subconical and projected dorso-caudad; frons confluent with vertex, slightly convex, subtrapezoidal and steeply, abruptly declining towards strongly transverse clypeus; supraantennal tubercles feebly marked; eyes large but weakly convex, oval and slightly oblique in relation to the long axis of the head, each composed of ca. 40 small and smooth ommatidia. Dorsal punctures on head fine and sparse, inconspicuous; setae long, moderately dense, erect, those on vertex mostly directed caudad, additionally each temple with an oval patch of very dense and short erect setae. Antennae ( Figs. 46–47 ) slender, gradually thickening towards apices, AnL 1.40 mm; antennomeres I–VII elongate, VIII about as long as broad; IX and X each slightly transverse; XI 1.7× as long as broad, distinctly asymmetrical, with subconical, blunt apex.

Pronotum ( Figs. 46–47 ) in dorsal view bell-shaped, broadest distinctly anterior to middle, PL 0.73 mm, PW 0.75 mm; anterior margin short and slightly arcuate; lateral margins distinctly bent at broadest point of pronotum, strongly convergent anterad and caudad; hind pronotal angles obtuse and blunt; posterior margin long and arcuate; base of pronotum with two pairs of nearly circular ante-basal foveae: small and shallow but distinct lateral foveae and slightly larger and deeper sublateral foveae. Punctures on pronotal disc very fine, inconspicuous; setae long, moderately dense and strongly erect, those on sides of pronotum bristle-like, distinctly thicker than those in middle.

Elytra ( Figs. 46–47 ) oval and more convex than pronotum, broadest distinctly anterior to middle, EL 1.50 mm, EW 1.13 mm, EI 1.33; base of elytra distinctly arcuate; humeral calli prominent, indistinctly delimited mesally by broad and deep basal impression; elytral apices separately rounded, each bearing long setal brush inserted on distinct papilla. Punctures on elytral disc slightly larger than those on pronotum but still fine and shallow; setae long, moderately sparse and strongly erect, about as thin as those on vertex and distinctly thinner than those on sides of pronotum. Hind wings well-developed, twice as long as elytra.

Legs ( Figs. 46–47 ) long and slender; metafemora with indistinctly delimited, slightly impressed subapical dorso-internal area with setae directed towards ventral margin of femur, all tibiae slightly curved inwards and with dense subapical group of setae along internal margin.

Abdominal sternites ( Figs. 51, 55 ). The holotype has only four externally visible abdominal sternites preserved; sternite IV bearing a pair of loose sublateral groups of divergent setae; sternite V with similar but denser groups of setae inserted on indistinct expansions of posterior margin; sternite VI bearing similar groups of setae on distinct expansions of posterior margin and long subtriangular median projection directed caudad.

Aedeagus ( Figs. 56–58 ) stout, AeL 0.55 mm, with rapidly narrowing, subtrapezoidal apex of median lobe; ventral wall with two projections (subapical external (sep) and subapical internal (sip) projection of ventral wall), between which distal part of internal sclerotized armature (endophallus) is projecting distally, composed of asymmetrical median projection of endophallus (mpe) covered densely with small denticles and a pair of subtriangular lateral projections of endophallus (lpe); dorsal wall with broadly subtrapezoidal subapical dorsal projection (sdp) and subbasally located basal orifice (bo); parameres with broad bases surrounding median lobe and with abruptly delimited slender apical parts bearing apical setae.

Female. Unknown.

Distribution. Northern Peru (east to the Andes), San Martin Province.

Figures

FIGURES 46 – 50. Morphology of Euconnomorphus pilosissimus Franz, holotype male. General habitus in dorsal (46) and left lateral (47) views; head in frontal view (48); head and prothorax in left lateral view (49); and elytral apices in dorsal view (50).

FIGURES 51 – 55. Morphology of Euconnomorphus pilosissimus Franz, holotype male. Venter (51; sternite VIII removed); head in ventral view (52); prothorax in ventral view (53); pterothorax in ventral view (54); and abdominal sternites IV – VI in ventral view (55). Abbreviations: ar, anterior ridge; aestII, mesanepisternum; aestIII, metanepisternum; bst, basistipes; cd, cardo; cxII, mesocoxa; cxIII, metacoxa; dlf, dorso-lateral fovea; epmIII, metepimeron; fo, foramen occipitale; gal, galea; gen, gena; gp, gular plate; gs, gular suture; h, hypostom; hyr, hypomeral ridge; hr, hypostomal ridge; hy, hypomeron; lac, lacinia; lb, labrum; lmfa, lateral metafurcal arm; lp, labial palp; md, mandible; mn, mentum; mscc, mesocoxal cavity; mscs, mesocoxal socket; mst, mediostipes; msvp, mesoventral intercoxal process; mtvp, metaventral intercoxal process; mxpI – IV, maxillary palpomere I – IV; nss, notosternal suture; occ, occipital constriction; par, projection of anterior ridge; pcc, procoxal cavity; pcs, procoxal socket; pn, pronotum; pre, prepectus; ps, prosternum; ptp, posterior tentorial pit; smn, submentum; stIII – VII, abdominal sternite III – VII; vII, mesoventrite; vIII, metaventrite; vlf, ventro-lateral fovea.

FIGURES 56 – 58. Morphology of Euconnomorphus pilosissimus Franz, holotype male. Aedeagus in ventral (56), dorsal (57) and lateral (58) views. Abbreviations: bo, basal orifice; lpe, lateral projection of endophallus; mpe, median projection of endophallus; sdp, subapical dorsal projection; sep, subapical external projection; sip, subapical internal projection.