Styphrus corpulentus Motschulsky 1845
Creators: name: Lackner, Tomáš
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Histeridae
Styphrus
Styphrus corpulentus

description: Styphrus corpulentus Motschulsky, 1845
(Figs. 12, 71, 105, 136, 677–693)
Styphrus corpulentus Motschulsky, 1845: 54.
Styphrus corpulentus: JAKOBSON (1911): 651; REICHARDT (1941): 174, Figs. 83, 84; KRYZHANOVSKIJ & REICHARDT (1976): 187, Figs. 367–372; MAZUR (1984): 78; MAZUR (1997): 245; MAZUR (2004): 101.
Saprinus akinini Schmidt, 1890: 19. Synonymized by JAKOBSON (1910): 264.
Saprinus mimulus Reitter, 1904: 29. Synonymized by JAKOBSON (1910): 263.
Xenonychus akinini: LEWIS (1905): 78.
Pachylopus akinini: REITTER (1906): 268.
Xenonychus laevidorsis Reitter, 1910: 13. Synonymized by BICKHARDT (1916): 103.
Styphrus laevidorsis: BICKHARDT (1910): 107.
Saprinus rugosipennis Dahlgren, 1971: 50. Synonymized by Kryzhanovskij in KRYZHANOVSKIJ & REICHARDT (1976): 187.
Type locality. Uzbekistan, Buchara.
Type material examined. Styphrus corpulentus. NEOTYPE (here designated):♁, ‘ Buchara, Kyzyl Kum / Uzbekistan 28.–30.IV. / A. Olexa 1975 [printed] // D07-026 [pink label, written] // NEOTYPUS / Styphrus / corpulentus / Motschulsky 1845 / Des. T. Lackner 2009 [red label, written]’ (ZIN).
Saprinus akinini. Par at ype: 1 spec., ‘ Saprinus / akinini / Schmidt / typ [written] // Paratypus [red label, written]’ (ZIN).
Comment. Type specimen(s) of this species were not found in Motschulsky’s collection,housed at ZMUM.According to N. Nikitsky (ZMUM), a part of the type specimens described by Motschulsky in 1845 has been destroyed and lost. Perhaps the type specimen(s) of Styphrus corpulentus were among those. The Motschulsky’s collection is in a very poor state. Therefore, it is necessary to designate a neotype for this species to fix its identity as type species of Styphrus. The neotype will be housed at ZIN.
Additional material examined. UZBEKISTAN: Kyzylkum, Buchara, 28.–30.iv.1975, 1 ♁, A. Olexa lgt.; Kyzyk-Kum, Chiva [= Khiva], 25.iv.1972, 1 ♁ 1 ♀, A. Olexa lgt.; ditto, but 3.v.1978, A. Olexa lgt., 3 ♀♀; ditto, but 23.iv.1972, A. Olexa lgt. (TLAN).
Redescription. Body length: PEL: 2.50–3.45 mm; APW: 0.85–1.20 mm; PPW: 1.975–2.80 mm; EL: 1.55–2.25 mm; EW: 2.20–3.10 mm.
Body (Figs. 677–678) roundly oval, ventrally strongly convex, moderately convex dorsally; cuticle dark brown with slight metallic tinge, elytral apex rufous; legs, mouthparts and antennae rufopiceous.
Antennal scape (Fig. 681) substrigulate, with numerous well sclerotized long setae; club (Figs. 679–680) large, flattened dorso-ventrally, round, without visible articulation, dorsal surface with large apical sensory area with dense short sensilla, intermingled with longer, much sparser erect sensilla; surface of club otherwise imbricate, with sparse long erect sensilla (except for basal fourth); sensory structures of antennal club (Fig. 12) in form of one large apical sensory area and four rather large ventral sensory areas and one vesicle on internal distal margin of ventral side.
Mouthparts. Mandibles (Fig. 104) with rounded outer margin, mandibular apex acute; subapical tooth of left mandible moderately large; labrum (Fig. 70) with scattered microscopic punctation, convex, with a slight median depression; labral pits with two weakly sclerotized setae; terminal labial palpomere thickened, its width about half its length; mentum (Fig. 683) square-shaped, imbricate, anterior margin medially with conspicuous notch (Fig. 136), fringed with numerous long setae, lateral margins as well as disc of mentum with numerous much shorter setae; cardo of maxilla on lateral margin with several short setae; stipes triangular, with three much longer setae; terminal maxillary palpomere thickened, its width about half its length, approximately twice as long as penultimate.
Clypeus (Fig. 681) rectangular, basally constricted, depressed laterally, with shallow irregular punctures; frontal stria well impressed, usually interrupted medially, shortly prolonged onto clypeus; supraorbital stria well impressed, carinate; frontal disc (Fig. 681) smooth, only with scattered microscopic punctation; eyes convex, conspicuous from above.
Pronotal sides (Fig. 677) moderately narrowed anteriorly, apical angles obtuse; pronotal foveae vaguely impressed, often absent; marginal pronotal stria complete, slightly weakened behind head; pronotal disc (except for inconspicuous scattered punctation along lateral margins and a double row of small ellipsoid punctures along pronotal base) entirely smooth; pronotal hypomeron setose; scutellum small, visible.
Elytral epipleura shiny, almost smooth, with scattered microscopic punctures; marginal epipleural stria weakly impressed, complete; marginal elytral stria well impressed, continued as weakly impressed complete apical elytral stria; inner subhumeral stria well impressed, rather long, apically reaching as far as four-fifths of elytral length, basally connected with weakly impressed humeral elytral stria; elytra with four rather thin dorsal elytral striae 1–4, apically reaching about elytral half, occasionally second dorsal elytral stria slightly longer; fourth dorsal elytral stria basally connected with complete sutural elytral stria; sutural elytral stria well impressed, complete, apically connected with apical elytral stria. Elytral disc on apical half with dense, shallow, often confluent punctures, basal half with much finer and sparser punctation; elytral flanks and elytral humeri smooth.
Propygidium almost completely exposed; punctation of propygidium and pygidium shallow but dense, punctures confluent, becoming more granulose apically.
Anterior margin of median portion of prosternum (Fig. 685) almost straight, pre-apical foveae absent; marginal prosternal stria present laterally and as thin apical fragment; prosternal process flattened; surface between carinal prosternal striae smooth; laterally substrigulate, with sparse punctures fringed with setae; carinal prosternal striae on prosternal apophysis slightly divergent, approximate, sub-parallel, slightly divergent apically, not united; lateral prosternal striae well impressed, shortened, slightly carinate, anteriorly ‘open’.
Anterior margin of mesoventrite straight; discal marginal mesoventral stria well impressed, slightly carinate; disc of mesoventrite flat, with shallow scattered punctation, few punctures with microscopic setae; meso-metaventral sutural stria well impressed, undulate; intercoxal disc of metaventrite convex, almost smooth, along posterior margin with irregular sparse fine punctures. Lateral metaventral stria well impressed, slightly carinate, almost straight, shortened apically; lateral disc of metaventrite concave, with scattered shallow punctures fringed with long setae; metepisternum on basal three-fourths with similar punctation and setae, on apical fourth + fused metepimeron punctation and setae sparser and finer.
Intercoxal disc of the first abdominal sternite completely striate laterally; surface of disc with sparse scattered punctation, interspaces imbricate, apically punctation sparser and finer; lateral sides of all visible abdominal sternites setose.
Protibia (Fig. 686) dilated, outer margin with three low teeth topped with rather long acute denticle, second and third teeth larger than first, followed by six short denticles diminishing in size in proximal direction; setae of outer row regular, rather sparse; protarsal groove deep; anterior protibial stria absent; setae of median row much shorter and sparser than those of outer row, present only on basal half; single tiny tarsal denticle present near tarsal insertion; protibial spur well developed, bent, growing out from apical margin of protibia; apical margin of protibia posteriorly with three short denticles; outer part of posterior surface of protibia (Fig. 686) broadly strigate, interspaces smooth, separated from glabrous median part of posterior surface by clear-cut boundary; posterior protibial stria complete, apically terminating in two tiny inner ventral denticles; inner row of setae lamelliform, strongly sclerotized, long.
Mesotibia slender, outer margin with single row of short thin denticles, only slightly growing in size in proximal direction; setae of outer row situated approximately in middle of posterior mesotibial surface, setae regular, dense, about as long as denticles themselves; setae of median row absent; posterior mesotibial stria shortened apically; anterior surface of mesotibia microscopically punctate; anterior mesotibial stria almost complete; inner anterior denticles absent; mesotibial spur rather long and stout; apical margin of mesotibia anteriorly with two tiny denticles; inner margin of mesotibia with long dense well sclerotized setae; claws of apical tarsomere almost straight, thin, almost as long as apical-most tarsomere itself; each mesotarsomere anteriorly with single long well sclerotized seta; metatibia (Fig. 684) similar to mesotibia, but slightly more thickened and another row of four sparse longer denticles appears on apical half of outer margin and posterior metatibial stria even shorter than posterior mesotibial stria.
Male genitalia. Eighth sternite (Fig. 687–688) widely separated along their entire length, apically with large inflatable membrane (velum) mesally and laterally with several rows of long close-set setae creating a conspicuous apical brush; eighth tergite and eighth sternite fused laterally (Fig. 689). Ninth tergite (Figs. 690–691) typical for the subfamily; spiculum gastrale (Fig. 690) expanded on both ends. Aedeagus (Figs. 692–693) slender; basal piece of aedeagus rather short, ratio of its length: length of parameres 1: 3.50; parameres fused almost along their apical length, on apical tenth with opening for the median lobe (best seen from lateral view); aedeagus strongly curved ventrad (Fig. 693).
description: Published as part of Lackner, Tomáš, 2010, Review of the Palaearctic genera of Saprininae (Coleoptera: Histeridae), pp. 1-254 in Acta Entomologica Musei Nationalis Pragae (suppl.) (suppl.) 50 on pages 215-220, DOI: 10.5281/zenodo.4272127