Euconnomorphus 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 : 69-73

publication ID	https://doi.org/ 10.5281/zenodo.282872
DOI	https://doi.org/10.5281/zenodo.6166877
persistent identifier	https://treatment.plazi.org/id/03F187FC-924A-9151-9BA1-B99E4E7DD70C
treatment provided by	Plazi
scientific name	Euconnomorphus Franz
status

Treatment

Euconnomorphus Franz View in CoL

Euconnomorphus Franz, 1980a: 207 View in CoL . Type species: Euconnomorphus pilosissimus Franz, 1980a View in CoL (original designation).

Revised diagnosis. Male: head elongate, with long, subconical vertex projecting dorso-caudad; tempora and sides of pronotum with dense, strongly erect bristles; fronto-clypeal groove absent; maxillary palpomere III strongly elongate and slender; mandible with broad basal part and abruptly narrowing, slender distal part with single mesal submedian tooth; pronotum bell-shaped, with four ante-basal foveae; basisternal part of prosternum about as long as procoxal cavities; prosternum without intercoxal process or carina; mesoventral intercoxal process long, narrow and strongly expanded ventrally (keel-shaped); mesoventrite without setose or asetose lateral impressions behind anterior ridge; mesothorax with two pairs of deep lateral foveae; metacoxae narrowly separated by subtrapezoidal metaventral intercoxal process; each elytron with single rudimentary and asetose basal fovea; parameres with broad sheath-like bases surrounding median lobe and with slender apical parts. Females and their diagnostic characters unknown.

Redescription. Body of male ( Figs. 46–47 View FIGURES 46 – 50 ) strongly convex, elongate but moderately slender, with long appendages, BL nearly 3 mm; cuticle glossy, brown, densely setose, vestiture long and erect.

Head ( Figs. 48–49 View FIGURES 46 – 50 , 52 View FIGURES 51 – 55 ) elongate, rhomboidal in shape, with large eyes; occipital constriction ( Fig. 52 View FIGURES 51 – 55 ; occ) in the narrowest place about as wide as half HW; tempora longer than eyes, gradually convergent caudad, each bearing long setae directed dorso-caudad and additionally oval patch of short and very dense setae adjacent to occipital constriction; vertex subconical and projecting dorso-caudad, bearing long setae directed dorso-caudad; frons between eyes transverse, abruptly and steeply declining towards strongly transverse clypeus; fronto-clypeal groove absent; antennal insertions separated by elongate part of frons slightly narrower than width of scape.

Labrum transverse with rounded anterior margin. Mandibles ( Figs. 48, 49 View FIGURES 46 – 50 ) symmetrical, each with broad basal part, without noticeable prostheca, and with abruptly delimited, slender and curved distal part bearing single submedian mesal tooth. Each maxilla ( Fig. 52 View FIGURES 51 – 55 ) with subtriangular basistipes ( Fig. 52 View FIGURES 51 – 55 : bst), elongate galea ( Fig. 52 View FIGURES 51 – 55 ; gal) and lacinia ( Fig. 52 View FIGURES 51 – 55 ; lac) and long maxillary palp composed of minute elongate palpomere I ( Fig. 52 View FIGURES 51 – 55 ; mxpI), strongly elongate, pedunculate palpomere II ( Fig. 52 View FIGURES 51 – 55 ; mxpII), long and slender palpomere III ( Fig. 52 View FIGURES 51 – 55 ; mxpIII) broadest near apex, and small, subconical and pointed palpomere IV ( Fig. 52 View FIGURES 51 – 55 ; mxpIV).

Labium ( Fig. 52 View FIGURES 51 – 55 ) with broad, subhexagonal submentum ( Fig. 52 View FIGURES 51 – 55 ; smn) indistinctly delimited from gular plate ( Fig. 52 View FIGURES 51 – 55 ; gp) and laterally fused with hypostoma ( Fig. 52 View FIGURES 51 – 55 ; h), subtrapezoidal mentum ( Fig. 52 View FIGURES 51 – 55 ; mn); and short prementum with a pair of median bristles and narrowly separated, small 3-segmented labial palps ( Fig. 52 View FIGURES 51 – 55 ; lp).

Gular plate ( Fig. 52 View FIGURES 51 – 55 ; gp) large and without demarcated anterior part; gular sutures ( Fig. 52 View FIGURES 51 – 55 ; gs) superficial; posterior tentorial pits ( Fig. 52 View FIGURES 51 – 55 ; ptp) indistinctly marked at base of submentum.

Antennae ( Figs. 46–47 View FIGURES 46 – 50 ) gradually thickening towards apices, antennomere XI distinctly asymmetrical, with subconical apex.

Pronotum ( Figs. 46–47 View FIGURES 46 – 50 ) in dorsal view bell-shaped, with moderately well-defined anterior and posterior corners; with rounded sides devoid of marginal carinae or edges; base of pronotum with two pairs of small antebasal foveae; sides of pronotum with dense, thick and long setae.

Prosternum ( Figs. 51, 53 View FIGURES 51 – 55 ; ps) with long basisternal part not demarcated from procoxal cavities ( Fig. 53 View FIGURES 51 – 55 ; pcc); median part of sternum without intercoxal carina or process; procoxal sockets ( Fig. 53 View FIGURES 51 – 55 ; pcs) closed by lateral lobes of sternum; hypomera ( Fig. 53 View FIGURES 51 – 55 ; hy) subtriangular; hypomeral ridge ( Fig. 53 View FIGURES 51 – 55 ; hyr) disrupted near middle; notosternal sutures ( Fig. 53 View FIGURES 51 – 55 ; nss) entire.

Mesoscutellum very small, subtriangular, barely visible between bases of elytra; mesoscuto-scutellar suture not visible in slide preparation.

Mesoventrite ( Figs. 51, 54 View FIGURES 51 – 55 ;) with narrow anterior ridge ( Fig. 54 View FIGURES 51 – 55 ; ar) without median projection; mesoventral intercoxal process ( Fig. 54 View FIGURES 51 – 55 ; msvp) narrow and keel-shaped; mesanepisternum with long prepectus ( Fig. 54 View FIGURES 51 – 55 ; pre) and posterior part ( Fig. 54 View FIGURES 51 – 55 ; aestII) visible in ventral view; mesepimeron not visible in ventral view; sides of mesothorax with two pairs of deep foveae: ventro-lateral foveae ( Fig. 54 View FIGURES 51 – 55 ; vlf) behind prepectus and dorso-lateral foveae ( Fig. 54 View FIGURES 51 – 55 ; dlf) behind mesanepisternum.

Metaventrite ( Figs. 51, 54 View FIGURES 51 – 55 ; vIII) strongly transverse, anteriorly fused with mesoventrite, posteriorly deeply bisinuate and with narrow median subtrapezoidal metaventral intercoxal process ( Fig. 54 View FIGURES 51 – 55 ; mtvp). Metanepisterna ( Fig. 54 View FIGURES 51 – 55 ; aestIII) and metepimera ( Fig. 54 View FIGURES 51 – 55 ; epmIII) narrow.

Metafurca ( Fig. 54 View FIGURES 51 – 55 ) with very short and broad stem and divergent lateral furcal arms ( Fig. 54 View FIGURES 51 – 55 ; lmfa).

Elytra ( Figs. 46–47, 50 View FIGURES 46 – 50 ) oval, each with single rudimentary and asetose basal fovea located in shallow and indistinctly delimited basal impression; humeral calli well-marked; each elytral apex ( Fig. 50 View FIGURES 46 – 50 ) with setal brush inserted on small papilla.

Legs ( Figs. 46–47 View FIGURES 46 – 50 , 51, 53–54 View FIGURES 51 – 55 ) long and slender; procoxae subglobose, mesocoxae slightly elongate, metacoxae transverse, stout; all trochanters short; all femora gradually clavate, metafemora with indistinctly delimited, slightly impressed subapical dorso-internal area with setae directed from dorsal to ventral margin of femur; all tibiae slightly curved inwards; tarsi long and slender.

Abdominal sternites ( Figs. 51, 55 View FIGURES 51 – 55 ) modified, IV–VI with sublateral groups of divergent setae; V–VI with a pair of sublateral expansions; VI with long median projection.

Aedeagus ( Figs. 56–58 View FIGURES 56 – 58 ) stout, with well-defined apical part of median lobe; ventral and dorsal wall with subapical projections; internal armature moderately darkly sclerotized, with distal part projecting between subapical external ( Fig. 56 View FIGURES 56 – 58 ; sep) and internal ( Fig. 56 View FIGURES 56 – 58 ; sip) projection of ventral wall; basal orifice ( Fig. 57 View FIGURES 56 – 58 ; bo) located subbasally; parameres with broad sheath-like bases and with abruptly delimited slender apical parts bearing apical setae.

Distribution and composition. Euconnomorphus is represented by a single species known from the northern part of Peru.

Remarks. Euconnomorphus superficially resembles some species of Euconnus in the general appearance, but clearly differs from Euconnus s. str. in the following characters: shape and vestiture of the head (vertex subconical and with long, dense bristles vs. vertex rounded and with sparse thin setae in Euconnus s. str.); shape of mandibles (abruptly separated basal and distal parts vs. gradually narrowing, subtriangular mandible in Euconnus s. str.); lack of fronto-clypeal groove (present in Euconnus s. str.); the sculpture of the pronotal base (four foveae vs. two in Euconnus s. str.); the length of basisternum (very long vs. rudimentary in Euconnus s. str.); structure of the mesoventrite (lack of sharply demarcated lateral setose impressions vs. presence of such impressions in Euconnus s. str.); the elytral base (with a single rudimentary basal fovea vs. two distinct foveae in Euconnus s. str.); shape of the metaventral intercoxal process (narrow, strongly projecting caudad vs. moderately broad and weakly projecting in Euconnus s. str.); and the aedeagus (with broad and sheath-like bases of parameres vs. slender parameres in Euconnus s. str.).