Ctenophilothis chobauti ( Théry, 1900 )

Lackner, Tomáš, 2010, Review of the Palaearctic genera of Saprininae (Coleoptera: Histeridae), Acta Entomologica Musei Nationalis Pragae (suppl.) 50, pp. 1-254 : 91-95

publication ID	https://doi.org/ 10.5281/zenodo.4272127
DOI	https://doi.org/10.5281/zenodo.4342037
persistent identifier	https://treatment.plazi.org/id/0385915E-FFC9-094B-60FD-FF3DCF85FE6A
treatment provided by	Felipe
scientific name	Ctenophilothis chobauti ( Théry, 1900 )
status

Treatment

Ctenophilothis chobauti ( Théry, 1900) View in CoL

( Figs. 17 View Figs , 43 View Figs , 46 View Figs , 78 View Figs , 85 View Figs , 114 View Figs , 266–281 View Figs View Figs )

Xenonychus chobauti Théry, 1900: 32 View in CoL .

Styphrus chobauti: BICKHARDT (1910) : 107.

Philothis chobauti: PEYERIMHOFF (1936) : 220, Figs. 2 View Fig , 225 View Figs ; MAZUR (1984): 109.

Ctenophilothis chobauti: KRYZHANOVSKIJ (1987) View in CoL : 25, Fig. 1 View Fig ; OLEXA (1990): 146, 153, Figs. 6 View Figs , 9, 10, 22, 27 View Figs , 52, 53 View Figs ; MAZUR (1997): 268; MAZUR (2004): 91.

Type locality. Algeria, Touggourt.

Material examined. ALGERIA: Sahara , Béni Abbès, 20.x.1980, 2 ♁♁ 1 ♀, A. Olexa lgt .; Iglu , 12.iv.1988, 1 ♁ 1 ♀, A. Olexa lgt .; Béni Abbès , 11.iv.1988, 1 spec., A. Olexa lgt. ( TLAN) .

Note. The type specimen(s) of this species were not found in the collection of Théry, housed at MNHN. According to Mrs. Azadeh Taghavian (MNHN), it is possible that a part of Théry’s collection is housed elsewehere. Therefore, a neotype for this species is not designated herein, since it is possible that the type specimen(s) may be found in the future.

Redescription. Body length: PEL: 2.00– 2.375 mm; APW: 0.825 –0.875 mm; PPW: 1.575–1.95 mm; EL: 1.375 –1.625 mm; EW: 1.825 –2.125 mm.

Body ( Figs. 266–267 View Figs ) roundly oval, moderately convex from above, underside very convex, cuticle castaneous, feebly shining; legs and mouthparts reddish-brown, antennal flagellum yellow.

Antennal scape ( Fig. 268 View Figs ) thickened, with numerous long setae; 8 th antennomere ( Fig. 268 View Figs ) cupuliform, in some specimens surrounding antennal club up to one-third its length; club ( Fig. 268 View Figs ) moderately sized, sub-conical, without visible articulation, with sparse short sensilla; ventral surface glabrous; sensory structures of antennal club ( Fig. 17 View Figs ) in form of stipe-shaped vesicle situated under a large circular sensory area on internal distal margin of the ventral side of antennal club, supplemented by another large sensory area opposite to first one.

Mouthparts. Mandibles ( Fig. 85 View Figs ) smooth, thin, evenly curved, mandibular apex acutely pointed, sub-apical tooth on left mandible extremely small, almost absent; labrum ( Fig. 46 View Figs ) deeply incised under clypeus, with shallow median depression, smooth; epipharynx completely hidden under labral fold ( Figs. 43 View Figs , 78 View Figs ); labral pits and setae arising from them absent; terminal labial palpomere thickened, its width about half its length; mentum sub-trapezoid, with a shallow median emargination ( Fig. 114 View Figs ); anterior and lateral margins with two rows of long setae; several setae present also on disc of mentum; cardo of maxilla on lateral margin with few long setae; stipes triangular, with four-five well sclerotized long setae; terminal maxillary palpomere thickened, its width longer than half its length, about three times as long as penultimate; sensory region of maxillary palpus curiously shaped, cap-like.

Clypeus ( Fig. 269 View Figs ) rectangular, rounded laterally, smooth; frontal stria absent; supraorbital stria fine, slightly carinate; postorbital stria interrupted medially; frontal disc broad, rounded, smooth (in some specimens with very fine frontal furrow); eyes flattened, invisible from above.

Pronotal sides ( Fig. 266 View Figs ) slightly narrowing anteriorly, anterior angles obtuse; marginal stria laterally carinate, on posterior tenth somewhat distanced from lateral margin, broadly interrupted behind head; surface along lateral margins fringed with short setae; disc moderately convex, with undulate or angular transverse wrinkles, area along anterior margin behind head smooth; pronotal hypomeron with long amber setae; scutellum almost invisible in some specimens.

Elytral humeri not prominent, epipleura setose ( Fig. 273 View Figs ); marginal epipleural stria complete, thin; marginal elytral stria well impressed, carinate, abbreviated on elytral apex; humeral elytral stria vaguely impressed, at times indistinguishable; inner subhumeral almost complete, parallel to first dorsal elytral; outer subhumeral stria vaguely impressed on basal fifth; first and second dorsal striae well impressed; first reaching elytral apex, apically bent inwardly, at times somewhat continued along apical margin; second dorsal elytral stria abbreviated on basal fourth, apically bent inwardly, almost complete; basal elytral stria present, vaguely connected with first dorsal elytral and sutural striae; sutural elytral stria well impressed, apically connected with apical elytral stria, on basal half somewhat distanced from elytral suture; elytral disc obscurely variolate, area between sutural stria and elytral suture, and area between elytral base and basal elytral stria smooth; elytral flanks smooth; wrinkles along elytral apex confluent.

Propygidium completely exposed, almost twice as long as broad, obscurely variolate; pygidium very convex, about as long as broad, obscurely variolate medially, laterally and apically smooth.

Anterior margin of prosternum ( Fig. 271 View Figs ) obtuse-angulate; marginal prosternal stria well impressed and complete; prosternal process densely setose, abruptly and strongly sloping down anteriorly behind striate triangular prosternal apophysis; lateral prosternal striae absent.

Anterior margin of mesoventrite ( Fig. 272 View Figs ) somewhat curved outwardly; discal marginal mesoventral stria absent anteriorly, laterally carinate; mesoventral disc smooth; meso-metaventral suture well impressed, straight; meso-metaventral sutural stria somewhat distanced from suture, undulate and carinate; intercoxal disc of metaventrite ( Fig. 272 View Figs ) smooth; lateral metaventral stria curved outwardly, shortened; post-mesocoxal stria absent; lateral disc of metaventrite ( Fig. 273 View Figs ) concave, with shallow punctures separated several times their diameter, punctures with long amber setae; metepisternum + fused metepimeron ( Fig. 273 View Figs ) densely setose, punctation almost unrecognizable beneath setae.

Intercoxal disc of the first abdominal sternite laterally with a thin incomplete stria; disc smooth, in postero-lateral corners with several short setae; dorsal and lateral discs of all visible abdominal sternites setose. All femora on outer and inner margins with long amber setae, profemur with setae on entire surface.

Protibia curved ventrad ( Fig. 274 View Figs ), dilated and somewhat thickened, outer margin with sparse row of long movable denticles, apically with two low teeth topped with stout denticle; outer row of setae very dense, setae very long; anterior protibial stria indistinguishable; protarsus absent; posterior surface of protibia ( Fig. 274 View Figs ) smooth; outer part of posterior surface separated from median part by thin stria; median part separated from inner part of posterior surface by complete posterior protibial stria; apical margin ventrally with several stout denticles; inner margin with dense row of long lamelliform setae; protibial spur minute.

Mesotibia slightly dilated and thickened, outer margin with two dense rows of long denticles abutting each other, denticles grow in size apically; outer row of setae dense, setae strongly sclerotized, long; median row of setae sparse, setae several times shorter; posterior mesotibial stria present only on basal third, next obliterated; anterior surface of mesotibia smooth; anterior mesotibial stria shortened apically; apical margin with dense row of thick denticles growing in size towards tarsal insertion; mesotibial spur the longest; tarsus thickened, short, telescope-like, diameter of each tarsomere diminishing apically; each tarsomere with two strongly sclerotized lamelliform setae, one dorsally, one ventrally; claws of meso- and metatarsi thin, long and straight, several times the length of last tarsomere; metatibia generally very similar to mesotibia, but even more dilated.

Male genitalia. Eighth sternite ( Figs. 275–276 View Figs ) longitudinally separated medially, apically with row of sparse short setae; eighth tergite and eighth sternite fused laterally ( Fig. 276 View Figs ). Morphology of 9 th tergite ( Figs. 278–279 View Figs ) typical for the subfamily; spiculum gastrale ( Fig. 278 View Figs ) expanded on both ends. Basal piece of aedeagus ( Figs. 280–281 View Figs ) short, ratio of its length: length of parameres 1: 3.25; parameres fused along their basal half; aedeagus apically curved ventrad ( Fig. 281 View Figs ).