Paravolvulus ovillum ( Solskij, 1876 )

Lackner, Tomáš, 2010, Review of the Palaearctic genera of Saprininae (Coleoptera: Histeridae), Acta Entomologica Musei Nationalis Pragae (suppl.) 50, pp. 1-254 : 160-164

Paravolvulus ovillum ( Solskij, 1876)

( Figs. 5 , 127 , 508–524 )

Saprinus ovillum Solskij, 1876: 240 .

Saprinus ovillum: LEWIS (1907) : 484; JAKOBSON (1911): 651.

Hypocacculus ovillum: BICKHARDT (1916) : 97.

Hypocacculus (Paravolvulus) ovillum: REICHARDT (1932) : 38, 112; REICHARDT (1941): 283, 293.

Paravolvulus ovillum: KRYZHANOVSKIJ & REICHARDT (1976) : 235, 236; MAZUR (1984): 103; MAZUR (1997): 264; MAZUR (2004): 95.

Type locality. Uzbekistan, Katty-Kurgan.

Material examined. KAZAKHSTAN: Dshulek [= Zhulek], 8.vi.1911, 1 ♀, Koshantshikov lgt .; Perovsk Syr- Darijsk. Obl. , 27.iv.[1]928, 1 ♁, V. Popov lgt. ( ZIN) . TURKMENISTAN: Bajram Ali , 23.iv.1981, 1 ♀, A. Olexa lgt. ( TLAN) .

Note. The type specimen of this species has not been found in the Solskij’s collection, housed at ZMUM. According to N. Nikitsky ( ZMUM) the type specimen should be housed at ZIN since Axel Reichardt personally examined it. However, no type specimen has been found during the visit at ZIN and its whereabouts are unknown. Since it is possible that the type specimen may re-emerge in the future the neotype is not designated herein.

Redescription. Body length: PEL: 2.425–2.50 mm; APW: 0.75 mm; PPW: 1.75–1.85 mm; EL: 1.45–1.50 mm; EW: 1.875 mm.

Body ( Figs. 508–509 ) elongate oval, convex; cuticle shining, dark brown with a feeble bronzy luster; pronotum darker; legs, antennae and mouthparts castaneous.

Antennal scape ( Fig. 510 ) slightly thickened, surface imbricate; with two short setae; club ( Fig. 514 ) without visible articulation, entire surface covered with short sensilla intermingled with sparser longer erect sensilla; sensory structures of antennal club not examined.

Mouthparts. Mandibles with rounded outer margin curved inwardly, acutely pointed. Labrum coarsely punctate, underside not examined; disc of labrum with two well impressed labral pits; two setae arising from each one; terminal labial palpomere elongated, its width about one-third its length; mentum ( Fig. 511 ) square-shaped; anterior margin ( Fig. 127 ) medially with a small acute notch surrounded by four moderately long setae; lateral margins with single row of shorter ramose setae, several sparse short setae present also on finely imbricate disc of mentum; cardo of maxilla on outer margin with few short setae; stipes ( Fig. 511 ) triangular, with three longer setae; terminal maxillary palpomere elongated, its width about one-third its length, about 2.5 times as long as penultimate; remaining mouthparts not examined.

Clypeus ( Fig. 510 ) rounded laterally, rugulose-punctate, punctures umbilicate; frontal stria weakly impressed, slightly carinate, medially interrupted, continued as a weakly impressed supraorbital stria; frontal disc ( Fig. 510 ) on anterior third verrucose-punctate; rest of disc with fine punctures separated about twice their own diameter; eyes moderately convex, well visible from above.

Pronotal sides ( Fig. 508 ) evenly rounded, almost parallel on basal two-fifths, thence convergent apically, strongly convergent on apical fourth; apical angles rather blunt; marginal pronotal stria complete, slightly carinate; disc with coarse and dense punctation, laterally forming elongate wrinkles, becoming finer and sparser medially; pronotal hypomeron glabrous.

Elytral epipleura punctate; marginal epipleural stria complete, well impressed; marginal elytral stria well impressed, carinate, continued as complete, if slightly weakened apical elytral stria; humeral elytral stria vaguely impressed on basal fourth, doubled; inner subhumeral stria well impressed as short medial fragment; elytra with four dorsal elytral striae 1–4, about the same length, apically surpassing elytral half; fourth stria basally connected with sutural elytral stria; sutural elytral stria well impressed, complete, continued as complete, somewhat weakened apical elytral stria; entire elytral disc covered with punctation, on basal half punctures sparser and finer; denser and coarser on apical half; extreme apex of elytra with a very narrow impunctate band.

Propygidium almost entirely concealed by elytra; pygidium ( Fig. 515 ) about as long as broad, with coarse and dense punctation, interspaces finely imbricate.

Anterior margin of median portion of prosternum ( Fig. 512 ) straight; marginal prosternal stria fragmentally present anteriorly and laterally; pre-apical foveae small; prosternal process moderately concave; between carinal prosternal striae finely punctulate, laterally substrigulate; carinal prosternal striae well impressed, slightly carinate, sub-parallel, not connected in front; lateral prosternal striae carinate, convergent anteriorly, not connected in front.

Anterior margin of mesoventrite ( Fig. 513 ) deeply emarginate medially, discal marginal mesoventral stria well impressed, slightly weakened anteriorly; disc of mesoventrite with scattered punctation, punctures separated several times their diameter; meso-metaventral sutural stria in form of a row of deep round punctures; intercoxal disc of metaventrite ( Fig. 513 ) with fine scattered punctures, along apical margin a band of coarse scattered punctures appears; lateral metaventral stria well impressed, carinate, straight, stopping near metacoxa; lateral disc of metaventrite with shallow round setiferous punctures; interspaces substrigulate; metepisternum + fused metepimeron on basal two-thirds with similar setiferous punctation, but punctures deeper, interspaces substrigulate; apical third (especially fused metepimeron) with much sparser punctation.

Intercoxal disc of the first abdominal sternite completely striate laterally; mesad to marginal stria with deep round punctures laterally, punctation medially weaker and sparser; along apical margin row of fine punctures present.

Protibia ( Fig. 516 ) moderately dilated, outer margin with three moderately large triangular teeth topped with triangular denticle becoming progressively smaller in proximal direction, followed by three minute round denticles; setae of outer row moderately dense, regular and short; setae of median row much shorter than those of outer row, inconspicuous; protarsal groove rather deep; anterior tibial stria present on basal half; single, rather short tarsal denticle present apically; protibial spur tiny, bent, growing out from apical protibial margin; apical margin of protibia posteriorly with two minute apical denticles; outer part of posterior surface of protibia coriarious-punctate; vaguely separated from glabrous median part of posterior surface, boundary between outer and median part of posterior surface marked by row of about 10 minute sclerotized setae; posterior protibial stria complete, in sparse weakly sclerotized setae apically turning into several short well sclerotized denticles; inner margin with single row of short setae.

Mesotibia slender, outer margin with two sparse rows of thin denticles growing in size apically; setae of outer row regular, rather dense, well sclerotized; setae of median row regular, much shorter and finer than those of outer row; posterior mesotibial stria almost complete; anterior surface of mesotibia imbricate with scattered minuscule punctures with microscopic setae; anterior mesotibial stria shortened apically, terminating in three tiny inner anterior denticles; mesotibial spur stout, short; apical margin with three tiny denticles; claws of apical tarsomere shorter than half its length; metatibia basically similar to mesotibia, slightly more slender.

Male genitalia. Apex of 8 th sternite ( Fig. 517 ) with large inflatable velum, resembling a suction cup fringed with microscopic setae; ninth tergite, tenth tergite and spiculum gastrale typical for the subfamily ( Figs. 518–521 ); apex of aedeagus pointed ( Fig. 524 ), aedeagus somewhat narrowed before apex ( Fig. 522 ), median lobe conspicuously protruding ( Fig. 523 ); basal piece rather short, ratio of basal piece: length of parameres 1: 6, aedeagus strongly curved ventrad ( Fig. 523 ).

Figures

Figs. 5–7. Saprininae, 8th antennomere: 5 – Paravolvulus ovillum (Solskij, 1876); 6 – Philothis (Atavinus) atavus (Reichardt, 1931); 7 – Turanostyphrus ignoratus Tishechkin, 2005.

Figs. 109–141. Saprininae, anterior margin of mentum, ventral view: 109 – Alienocacculus neftensis (Olexa, 1984); 110 – Ammostyphrus cerberus Reichardt, 1924; 111 – Axelinus ghilarovi Kryzhanovskij, 1976; 112 – Chalcionellus amoenus (Erichson, 1834); 113 – Chivaenius kryzhanovskii Olexa, 1980; 114 – Ctenophilotis chobauti (Théry, 1900); 115 – Eopachylopus ripae (Lewis, 1885); 116 – Eremosaprinus vlasovi (Reichardt, 1941); 117 – Euspilotus (Neosaprinus) perrisi (Marseul, 1872); 118 – Exaesiopus grossipes grossipes (Marseul, 1855); 119 – Gnathoncus rotundatus (Kugelann, 1792); 120 – Hypocaccus (Hypocaccus) rugiceps (Duftschmid, 1805); 121 – Hypocaccus (Baeckmanniolus) dimidiatus dimidiatus (Illiger, 1807); 122 – Hypocacculus (Hypocacculus) metallescens (Erichson, 1834); 123 – Hypocacculus (Colpellus) praecox (Erichson, 1834); 124 – Hypocacculus (Nessus) rubripes (Erichson, 1834); 125 – Microsaprinus therondianus (Dahlgren, 1973); 126 – Myrmetes paykulli Kanaar, 1979; 127 – Paravolvulus ovillum (Solskij, 1876); 128 – Philothis (Philothis) arcanus Reichardt, 1930; 129 – Philothis (Atavinus) atavus (Reichardt, 1931); 130 – Philothis (Farabius) hexeris Reichardt, 1930; 131 – Pholioxenus phoenix (Reichardt, 1930); 132 – Reichardtiolus duriculus (Reitter, 1904); 133 – Saprinillus paromaloides Kryzhanovskij, 1974; 134 – Saprinus (Saprinus) semistriatus (Scriba, 1790); 135 – Saprinus (Hemisaprinus) subvirescens (Ménétries, 1832); 136 – Saprinus (Phaonius) pharao (Marseul, 1855); 137 – Styphrus corpulentus Motschulsky, 1845; 138 – Turanostyphrus ignoratus Tishechkin, 2005; 139 – Xenonychus tridens (Jacquelin-Duval, 1852); 140 – Xenophilotis choumovitchi (Thérond, 1965); 141 – Zorius funereus (Schmidt, 1890).

Figs. 508–516. Paravolvulus ovillum (Solskij, 1876), SEM micrographs: 508 – habitus, dorsal view; 509 – ditto, ventral view; 510 – clypeus and frontal disc; 511 – mentum, submentum and cardines and stipites of maxilla, ventral view; 512 – prosternum; 513 – mesoventrite and metaventrite; 514 – antennal club, ventral view; 515 – pygidium; 516 – protibia, dorsal view.

Figs. 517–524. Paravolvulus ovillum (Solskij, 1876), male terminalia: 517 – 8th sternite (apical half), ventral view; 518 – 9th tergite, 10th tergite (dorsal view); 519 – ditto, lateral view; 520 – spiculum gastrale, ventral view; 521 – ditto, lateral view; 522 – aedeagus, dorsal view; 523 – ditto, lateral view; 524 – apex of aedeagus, frontal view.