Strongylium (s. str.) napolovi, Telnov & Masumoto, 2024

Strongylium (s. str.) napolovi sp. nov. ( Figs 4 View Fig , 9A–C View Fig )

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16 Type material designated. Holotype ♂ NME: INDONESIA, Sulawesi, South Sulawesi Prov., Palopo 15 km NWW, Battang vill., 2°57’S, 120°03’E, 20.XII.2017, 1100 m, disturbed lowland rainforest, MV light [printed]. The right protarsal claws are missing, the apex of the right elytron and the abdomen are damaged by Anthrenus sp. GoogleMaps

Derivatio nominis. Patronymic. Named for Alexander Napolov (Rīga National Zoo, Latvia) for his investment into the study of Sulawesi Coleoptera . Masculine.

Measurements. Holotype male, total body length 9.5 mm; head length 1.3 mm, maximum head width across compound eyes 1.7 mm, pronotal length 1.8 mm, maximum pronotal width 2.6 mm, elytral length 6.5 mm, maximum combined width 3.4 mm.

Description. Holotype male. Dorsum uniformly black-brown, venter brown. Head trapezoid, transverse, opaque dorsally and ventrally. Labrum subtruncate at anterior margin. Epistoma truncate at anterior margin. Moderately deep, nearly straight impression at place of frontoclypeal suture. Antennal insertion concealed in dorsal view beneath raised gena. Compound eye large, anterior margin narrowly emarginate at antennal insertion and genal canthus, broadly rounded at posterior margin, strongly protruding from lateral and dorsal outline of head. Minimum interocular distance about 1.3× as wide as length of dorsal eye portion. Tempus short, slightly bulged. Head dorsum densely punctate with irregularly shaped, moderately deep punctures. Intervening spaces subopaque, microscopically punctate, generally narrower than punctures. Head dorsal setation dirty whitish, short, not fully appressed, setae slightly clavate apically. Antenna moniliform, not widened distally, exceeds level of mesocoxa when directed posteriorly. Basal antennomere about 2.3× as long as antennomere two. Antennomere two small, slightly transverse. Antennomere three 4.6× as long as antennomere two, 1.3× as long as antennomere four. Antennomeres 3–6 slender, 7–10 slightly widened distally, 8–11 with sensorial fields of punctures covered with dense short whitish setae. Terminal antennomere fusiform, rounded apically, about 1.2× as long as penultimate antennomere. Terminal maxillary palpomere small, strongly triangular. Pronotum strongly transverse, opaque dorsally and laterally, widest around midlength, slightly converging anteriad and posteriad (subparallel in front of posterolateral angles), truncate at anterior, slightly sinuous at posterior margin, strongly convex in dorsal aspect but flattened in front of base. Anterior pronotal edge finely margined, margin expanded medially. Posterior pronotal edge broadly margined. Anterolateral angles broadly rounded, posterolateral angles nearly right-angled in dorsal view. Lateral pronotal edge poorly defined as a carina

( Fig. 4B View Fig ), not margined, not visible in dorsal view, somewhat obtuse-angulate medially in dorsal view. Moderately deep median longitudinal impression on pronotal disc except at base; pronotal disc slightly bulged both sides of impression. Pronotal punctures irregularly shaped, large and moderately deep. Intervening spaces opaque, raised (corrugate), much narrower than punctures. Dorsal pronotal setae as those on head, seta does not surpass length of corresponding puncture. Scutellar shield small, narrow, rounded at posterior margin, opaque, minutely punctate and densely setose except for nearly glabrous midline. Elytra widest across postmedium, opaque, subparallel, dorsally convex. Elytral surface with deepened, punctured longitudinal striae (seven complete to nearly complete and one short scutellar stria visible in dorsal view) and distinctly elevated interstriae (except for interstria one which is only slightly elevated). Striae 4–5 shortest and conjoin preapically. Punctures in striae very deep, irregularly quatrefoil-shaped ( Fig. 4D View Fig ). Interstriae elevated, opaque microcorrugate, with sparse drop-like glossy tubercles ( Fig. 4D View Fig ). Elytral lateral margin not visible in dorsal view. Elytral setae dirty yellowish, thickened, appressed, arranged in longitudinal rows on interstriae, not present in striae. Epipleuron complete, moderately wide, opaque, corrugate and with sparse dirty yellowish appressed setae. Metathoracic wings fully developed (functional). Meso-, metathorax and abdomen glossy. Abdominal sternites minutely punctate, delicately setose. Legs very long and slender, especially mesothoracic pair. Femur slender, slightly clavate, densely punctate. Tibia shorter than corresponding femur, nearly straight, hardly widens distally. Metatibia shallowly impressed on inner basal edge, provided with patch of long yellowish setae ( Fig. 4C View Fig ). Tarsus long, shorter than corresponding tibia, underside

17 with long yellowish setae. Terminal tarsomere of pro- and mesothoracic leg about as long as combined length of remaining corresponding tarsomeres. Male sternite VII broadly rounded at posterior margin. Aedeagus as in fig. 9A–C (basale is Anthrenus -destroyed).

Sexual dimorphism. Female is unknown.

Differential diagnosis. This new species is unique among other congeners due to the setose dorsum, the modified male metatibia and the deeply punctured elytral striae. No similar species are known in the Oriental and Papuan Region except for S. (s. str.) suwawa sp. nov. which is described herein. See the diagnosis of the latter. Strongylium napolovi sp. nov. somewhat resembles some species placed in Hexarhopalus Fairmaire, 1891 by Bečvář & Purchart (2008) but is different in the non-clavate antenna and the hardly clavate femora, the absence of the prebasal indentation at the lateral margin of pronotum, the lateral outline of the pronotum not depressed posterolaterally.

Ecology. Sampled at 1100 m at light in a disturbed lower montane rainforest.

Distribution. Sulawesi (central part): South Sulawesi Province.