Cerogria, Borchmann, 1911

Telnov, Dmitry, 2023, New and poorly-known taxa of Lagriinae Latreille, 1825 (Coleoptera: Tenebrionidae) predominantly from the collections of the Naturkundemuseum Erfurt. 1, Baltic Journal of Coleopterology 23 (1), pp. 1-33 : 1-33

Cerogria s. l. critica sp. nov. ( Figs 14–15 )

urn:lsid:zoobank.org:act:89552F36-73BA-436B-908F-4FABF525347E

Type material designated. Holotype male NME: INDONESIA, Sulawesi, South Sulawesi Prov., Palopo 9 km NW, Battang vill., 2°57’S, 120°07’E, 10.XII. 2017, 420 m, disturbed lowland rainforest, daytime collecting [printed].

Paratypes 3 specimens. 2 females NME & 1 female DTC: same label as holotype.

Derivatio nominis. Named from Latin

Description. Holotype male ( Fig. 14A ). Dorsal and ventral forebody uniformly black to black-brown. Elytra dark brown. Ventral pterothorax and abdomen dark brown. Mouthparts, maxillary palps, antennae and legs black to black-brown. Head elliptical, about same wide as long,

19 opaque dorsally and ventrally. Labrum shallowly emarginate medially at anterior margin. Epistoma broadly and shallowly emarginate at anterior margin. Frontoepistomal impression moderately deep, distinct. Anterolateral area of frons moderately projected laterodorsad to hold insertion of antenna, glossy and smooth. Compound eye large, strongly kidney-shaped, strongly emarginate at anterior, shallowly and broadly - at posterior margin in lateral view, not touching insertion of antenna, slightly prominent in lateral and dorsal aspects. Interfacetal setae not observed. Minimum interocular distance about 0.7–0.8× a length of dorsal eye portion. Tempus about half a length of dorsal eye portion, constricted posteriad, posterior temporal angle rounded, head basetruncate. Head dorsum densely punctate with flat elliptical punctures with opaque background. Intervening spaces narrowerthan punctures, slightly glossy. Head dorsal setation inconspicuous, yellowish, rather short, suberect, directed generally anteriad. Few much longer suberect setae on epistoma and labrum. Antenna

( Fig. 14C ) moderate, filiform, extending towards mesocoxa when directed posteriad. Basal antennomere strongly thickened, elongate, about 2.6× as long as antennomere two. Antennomere two shortened, somewhat widened apically. Antennomere three shortened, broadly widened distally, transverse, with non-prominent distal lobe at anterior margin, about 1.2× as long as antennomere two. Antennomere four the longest among antennomeres 2–10, asymmetrical, slightly thickened and arched (shallowly impressed at anterior margin). Antennomere five the shortest among all antennomeres, strongly transverse. Antennomere six asymmetrically trapezoid, short ad thick, flattened at anterior margin, with non-prominent antero-ventro-distal lobe. Antennomere seven strongly asymmetrical, longer than previous, flattened at anterior margin, antero-ventro-distal lobe longer and strongly angulate. Antennomere eight

20 shorter than previous, strongly asymmetrical, with distinct antero-distal lobe, flattened at anterior margin. Antennomere nine strongly asymmetrical, with a strong antero-distal lobe therefore transverse. Antennomere ten slightly longer than previous, asymmetrical, with less prominent antero-distal lobe than previous. Terminal antennomere asymmetrically fusiform, apically rounded, 0.7 mm long, about 2.3× as long as penultimate antennomere and slightly longer than combined length of two preceding antennomeres. Terminal maxillary palpomere securiform. Cranial ‘neck’ distinctly less coarsely punctate than dorsal head. Pronotum broadly subcylindrical, about as long as wide, opaque and flattened dorsally, subtruncate at both anterior and posterior margin. Maximum width across midlength, barely constricted anteriad and posteriad. Anterior and posterior margin not beaded or rimed. Antero- and posterolateral angles obtusely angulate in dorsal view. Dorsal pronotal punctures pentagonal to elliptical, coarse, very dense, with opaque background. Intervening spaces narrower than punctures, glossy. Dorsal pronotal setae similar to those on dorsal head, not concealing sculpture of pronotal disc. Scutellar shield small, apically rounded, densely punctured. Elytron elongate, slightly widened postmedium, dorsally slightly convex, subopaque. Apical sutural angle rounded. Elytral sculpture similar to that on pronotal disc but generally smaller and somewhat sparser. Intervening spaces in part narrower than in part wider than punctures, glossy. Elytral setae inconspicuous, yellowish, short, curved, directed posteriad. Epipleuron complete, very broad at anterior third, densely punctured and setose as an elytral disc. Metathoracic wings fully developed (functional). Legs stout, femora and tibiae slightly glossy, with whitish, inconspicuous, appressed setae. Femora somewhat thickened. Tibiae subequally long to corresponding femora. Male protibia widened distally. Male mesotibia somewhat curved, inner margin with inconspicuous median swelling and distally withconspicuous, densely setose hook ( Fig. 14D ); long setae along posterior margin between a swelling and hook. Protarsomeres 2–4 conspicuously short. Basal metatarsomere shorter than combined length of remaining metatarsomeres. Tergite VII and morphological sternite VII broadly rounded at posterior margin. Aedeagus as in Fig. 15 .

Differential diagnosis. The new species is unique in its genus primarily due to the structure of the male antenna in the combination with the shape of the aedeagus.

Ecology. Occurs in disturbed lowland rainforest at about 400 m. Diurnal, observed on low vegetation.

Distribution. Southern Sulawesi.

Note. This species with the strongly modified intermediary antennomeres 3, 4, 7, 9– 10 does not fit in any of subgenera of Cerogria as of Borchmann (1936).

Figures

Fig. 14.Cerogrias. l.critica sp. nov. A – Holotype male, habitus, dorsal view; B – Paratype female, habitus, dorsal view; C – Holotype male, left antenna, anterodorsal view; D – ditto, metatibia, dorsal view [not to scale].

Fig. 15.Cerogrias. l.criticasp. nov., holotype male, aedeagus in dorsal (A), ventral (B) and lateral (C) view. Paratypes 3 specimens. 2 females NME & 1 female DTC: same label as holotype.