Nocalusa, Santos-Silva & Galileo, 2018

Santos-Silva, Antonio & Galileo, Maria Helena M., 2018, A new genus and species of Anacolini (Coleoptera, Cerambycidae, Prioninae) from Bolivia, Zootaxa 4379 (1), pp. 140-144 : 140-141

Nocalusa , gen. nov.

Type species: Nocalusa prodigiosa sp. nov., present designation.

Etymology. Anagram of Anacolus . Feminine gender.

Description. Female. Head transverse, elongate behind eyes; frons narrow, transverse, concave. Median groove well-marked from clypeus to prothoracic margin.Antennal tubercles moderately elevate, with rounded apex, distant from each other. Eyes protruding, not coplanar with surface around them; upper eye lobes more distant from each other than maximum width of scape; lower eye lobes about 1.5 times genal length. Gena long, rounded at apex. Postclypeus large, wider than frons; anteclypeus narrow, not notably separated from postclypeus. Labrum narrow, transverse, distinctly concave. Mandibles short, strongly curved at about distal half; apex wide, bifid.Maxillary palps lobs; labialpalpomere III ( Fig. 7 ) about 1.5 times longer than II, sides divergent in basal third parallel-sided on distal 2/3. Antennae 11-segmented, almost reaching distal sixth of elytra.S cape troncoconical, in frontal view, curved, without dorsal depressions, distinctly shorter than antennomere III. Antennomeres filiform; longitudinally carinate ventrally, more distinctly from VI, only distally in antennomere III. Prothorax transverse; anterolateral and posterolateral angles subtriangularly projected; centro-lateral area with large subtriangular, slightly flattened tubercle, with apex slightly inclined upward (together with anterior and posterior angles, lateral margins 3 tuberculate). Pronotum with basal margin slightly, uniformly rounded; distal margin rounded, centrally slightly emarginate; with large, elevate gibbosity each side, which are centrally longitudinally depressed; surface between gibbosities depressed; surface coarsely, somewhat rugose punctate except on smooth gibbosities. Prosternum slightly narrower than maximum width of prosternal process, centrally notably convex (convexity prolonged toward prosternal process); on each side of central convexity transversely carinate (starting at apex of convexity). Prosternal process about as wide as basal area of profemora, long, gradually narrowed toward blunt apex, which touches apex of metaventral process. Central area of mesoventrite and entire mesoventral process hidden by prosternal process. Metaventrite centrally depressed in large triangular area; metaventral process almost reaching basal third of mesocoxal cavities, not elevated and not separating mesocoxal cavities ( Fig. 4 ). Metanepisternum wide, narrowed near apex, which is narrowly truncate. Scutellum moderately large; sides slightly convergent toward subrounded apex. Elytra exposing abdominal segments I–IV; humerus not protruding; subparallel-sided from near humerus to at about distal quarter, then gradually narrowed toward rounded apex; dehiscent along distal sutural third; surface rugose-punctate; not carinate; glabrous except for sparse, long, erect setae basally. Wings ( Fig. 6 ) well-formed, with distinct wedge cell. Hind coxae notably separated, distance between them equal to about half of width of metaventrite. Femora slightly fusiform. Tibiae slightly, gradually widened toward apex. Tarsi long, about 0.7 times tibial length in hind legs. Abdomen fusiform, as long as 1.5 times length of head and thorax together; intercoxal process notably wide, subparallel-sided and apex subtruncate; ventrites I–III with similar length (excluding abdominal process), IV shorter than III, V shorter than V; apex of ventrite V subtruncate, centrally emarginate.

Remarks. Nocalusa gen. nov. is similar to Oideterus Thomson, 1857 , by the process of metaventrite not projected between mesocoxae in lateral view, antennae 11-segmented, scape moderately long, and wings with closed cell. Females of Nocalusa differ from those of Oideterus as follows: dorsal surface of scape without concave area; anterolateral angles of prothorax distinctly projected; elytra not covering nearly all abdomen; hind coxae notably distinct each other; intercoxal process of abdominal ventrite I very wide with subtruncate apex. In Oideterus , the scape has depressed area dorsally, anterolateral angles of prothorax are not projected, elytra cover all or nearly all abdomen, hind coxae are not notably distant each other, and the intercoxal process of abdominal ventrite I is moderately small and triangular. The general appearance of the prothorax is much like that in Xanthonicias Galileo, 1987 , but the antennae are distinctly longer (reaching about basal third of elytra in Xanthonicias ), process of metaventrite not projected between mesocoxae when viewed sideways (distinctly projected in Xanthonicias ), hind coxae notably distant each other (no so in Xanthonicias ), and the abdomen is notably long (short, covered or nearly so by the elytra in Xanthonicias ). Nocalusa resembles Anacolus Berthold, 1827 by the metacoxae notably distant each other, and intercoxal process of abdominal ventrite I very wide, but differs by the slender body (stouter in Anacolus , especially in female), shorter mandibles (distinctly longer in Anacolus ), and by the abdomen most exposed by the elytra (covered by the elytra in females of Anacolus ). The distance between metacoxae is distinctly smaller in males of Anacolus ( Fig. 10 ) than in females ( Fig. 9 ), which may suggests that the same also occur in males of Nocalusa . It also resembles females of Prionapterus Guérin- Méneville, 1831, by the prothoracic and abdomen shapes, but differs by the presence of developed wings (absent in females of Prionapterus ).

Figures

FIGURES1–10.1–7, Nocalusa prodigiosa sp.nov., holotype female:1, Dorsal view; 2, Ventral view; 3, Lateralview; 4, Metaventral process;5,Head,frontal view; 6,Wing;7, Labialpalp.8, Piesacus exiguusGalileo,1987, paratype female,metaventral process.9–10, Anacolus sanguineus (Lepeletier & Audinet-Serville,1825), metacoxae andabdominal intercoxal process:9, Female; 10, Male.