Stenichnus (Stenichnus) styriacus Franz 1960
Creators: name: Jałoszyński, Paweł
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Stenichnus
Stenichnus styriacus

description: Stenichnus (Stenichnus) styriacus Franz
Stenichnus (Cyrtoscydmus) styriacus Franz, 1960: 338.
Stenichnus goriciensis Franz, 1961: 20, syn. n. Description in Franz, 1960: 335, misidentified as S. barnevillei (Reitter). (Figs 1–8)
Type material. Holotype of Stenichnus styriacus: AUSTRIA (Styria): ♁, three labels (Fig. 4): „Raabklamm / b. Weiz, Styr / leg. H.Franz ” [yellowish, printed] with „X983” handwritten on reverse side, „ Stenichnus / styriacus m. / Typus ♁ / det. H.Franz ” [creamy white, handwritten and printed], „ Holotypus ” [red, printed] (NHMW: Franz Coll.). Paratype: ♁, same data as for holotype, except for „ X1507 ” on reverse (NHMW: Franz Coll.). Holotype of Stenichnus goriciensis: ITALY (Friuli Venezia Giulia): ♁, four labels (Fig. 8): „Görz / Ludy” [originally white, now darkened, handwritten], „c. Epplsh. / Steind. d.” [originally white, now darkened, printed], „ Stenichnus / barn-evillei / Rtt. / det. H.Franz ” [white, handwritten and printed], „Barnevillei / Reitt.” [originally white, now darkened, handwritten], new label added during present study: „ STENICHNUS / goriciensis Franz, 1961 / HOLOTYPUS ” [red, printed] (NHMW: Eppelsheim Coll.).
Additional material studied: 3 exx. identified by Franz as S. goriziensis, Slovenia, region Slovene Littoral (Slo-vene: Primorska), Pliskovica ad Sežana, 11.03.84, leg. M. Seriani (NHMW: Franz Coll.).
Diagnosis. Pronotal base with distinct median longitudinal wrinkle interrupting transverse band of several small, irregular in shape and distribution pits or large punctures; head and pronotum virtually impunctate, elytra with distinct punctures; profemora in male distinctly thicker than meso- and metafemora, with dorsal surface in-distinctly angulate in lateral view; aedeagus with subtrapezoidal distal region demarcated from basal capsule by distinct constriction, ventral wall with longitudinal impression in subapical region bordered at each side by arcuate longitudinal ridge, impression distally forming subapical transverse subrectangular lobe, behind which a slightly larger plate with emarginate apex and a pair of elongate subtriangular projections are situated; endophallus lacking darkly sclerotized structures, forming large membranous and finely denticulate sac with a pair of darker submedian folds convergent toward aedeagal apex.
Description. Body of male (Figs 1, 5) moderately slender, dark brown to nearly black, with legs slightly, and antennae and maxillary palps distinctly lighter than remaining body parts, setae yellowish; BL 1.29–1.40 mm.
Head subtriangular, broadest at eyes, HL 0.19–0.23 mm, HW 0.28–0.30 mm. Vertex and frons confluent, vertex weakly convex, frons in front of eyes flattened, supraantennal tubercles weakly elevated; tempora distinctly shorter than large, strongly convex and finely faceted eyes. Punctures on frons and vertex fine, inconspicuous; setae sparse, short, suberect. Antennae slender, AnL 0.59–0.65 mm, scape and pedicel each strongly elongate, antennomeres 3–5 each slightly or indistinctly elongate, 6 and 7 each about as long as broad or each barely noticeably elongate, 8 weakly transverse in holotype of S. styriacus, indistinctly so in male paratype of S. styriacus and in all studied specimens from Slovenia, 9 and 10 each weakly transverse, 11 slightly shorter than 9 and 10 combined, about 1.8 × as long as broad.
Pronotum in dorsal view inversely subtrapezoidal, broadest near anterior third, PL 0.35–0.38 mm, PW 0.33– 0.35 mm; anterior margin strongly rounded; sides in anterior third strongly rounded, in posterior half slightly sinu-ate; posterior corners obtuse-angled and broadly rounded; posterior margin arcuate. Base of pronotum with trans-verse band of several irregular in shape and unevenly, but densely distributed small pits or punctures interrupted at middle by short impunctate longitudinal wrinkle. Punctures as inconspicuous as those on frons and vertex; setae long, sparse and suberect.
Elytra together oval, strongly convex, broadest distinctly in front of middle; EL 0.75–0.80 mm, EW 0.53–0.60 mm, EI 1.33–1.45; basal elytral impressions short but distinct; humeral calli weakly elevated; elytral apices sepa-rately rounded. Punctures on elytra much more distinct than those on head and pronotum, relatively large but shal-low and with diffuse margins, dense, spaces between punctures equal to or shorter than their diameters.
Legs moderately long and slender, profemora thickened in relation to meso- and metafemora, with slightly angulate dorsal margin.
Aedeagus (Figs 2–3, 6–7) stout, AeL 0.20 mm; median lobe in ventral view with distinct constriction demarcat-ing basal capsule from distal region; diaphragm large, nearly semicircular; ventral wall of median lobe with elongate median impression in subapical region flanked at each side by arcuate, elongate ridge, impression distally form-ing transverse subrectangular plate, behind which slightly larger plate with emarginate distal margin and a pair of elongate subtriangulr projections can be seen; aedeagal apex subtriangular and rounded; endophallus lacking darkly sclerotized structures, with membranous sac densely covered with denticles, in submedian region two folds of in-ternal sac are present, each with denticles so dense that appearing darker than surrounding areas, folds convergent distad; parameres slender, each with 2–3 apical setae.
Remarks. Franz misidentified specimens of an undescribed Stenichnus as S. barnevillei, and used them to rede-scribe the latter species (Franz 1960). He corrected his mistake a year later and named the new species S. goriciensis, and explicitly selected the male from Görz as a “Type”, which is a valid holotype designation. However, he did not label the holotype with a new species name. The male specimen with label “Görz / Ludy” illustrated here, and found among other Scydmaeninae in Coll. Epplesheim at NHMW, can be unambiguously identified as the holotype of S. goriciensis.
description: Published as part of Jałoszyński, Paweł, 2020, Stenichnus goriciensis Franz, a junior synonym of S. styriacus Franz (Coleoptera Staphylinidae, Scydmaeninae), pp. 586-590 in Zootaxa 4881 (3) on pages 588-590, DOI: 10.11646/zootaxa.4881.3.10, http://zenodo.org/record/4283872