Macratria kundratai, Telnov, 2023

Telnov, Dmitry, 2023, Fourth contribution to the Macratriinae LeConte, 1862 of the Papuan Region and Wallacea (Coleoptera: Anthicidae) with descriptions of sixteen new species, Zootaxa 5361 (1), pp. 1-52 : 18-21

Macratria kundratai sp. nov.

urn:lsid:zoobank.org:act:9F033D23-B207-4127-81B8-C5EBE546C045

( Figs 43–53 )

Type material designated. Holotype ♂ NME: INDONESIA E, New Guinea, Papua Prov., Sarmi 17 km SSE, 01°58’00’’S 138°51’26’’E, 30 m, 27.III.1998, stream & swampy sago forest [printed].

Paratypes 7 specimens. 4♂ ♀ NME , 2♂ & 1♀ DTC: same label as holotype.

Derivatio nominis. Patronymic. Named for Robin Kundrata (Palacky University, Olomouc, Czech Republic).

Measurements, holotype male, total body length 4.2 mm; head length 0.8 mm, head width across compound eyes 0.7 mm, pronotal length 1 mm, maximum pronotal width 0.75 mm, elytral length 2.4 mm, combined maximum elytral width 1.05 mm. Male paratypes 3.6–3.9 mm, female paratypes 4.2–4.6 mm long.

Description. Male ( Figs 43–44 ). Dorsum and venter brown, head reddish-brown. Mouthparts including maxillary palpi, antenna and legs yellowish brown. Head moderately glossy dorsally and ventrally. Frons wide, nearly equal to dorsal eye length. Compound eye large, occupying most of lateral side of head beyond antennal insertion, moderately protruding from lateral outline of head. Interfacetal setae long, moderately dense. Tempus strongly converging towards head base, about 0.4× as long as dorsal eye length. Head base subtruncate, medially hardly notched. Frontoclypeal suture or impression not observed. Head dorsal punctures dense (smaller and denser on anterior part of frons), moderately deep. Intervening spaces smooth, narrower than to as wide as punctures. Head dorsal setae yellowish, subdecumbent, long and dense, partially concealing dorsal surface of head. Tactile setae not observed. Antenna slender and filiform, slightly thickened at apex, extending somewhat beyond midlength of pronotum when directed posteriad. Basal antennomere elongate, about as long as antennomere two. Antennomere three hardly longer than antennomere two, about same long as antennomere four. Antennomeres 9–11 thickened. Terminal antennomere slightly elongate, asymmetrical, acutely pointed, about 1.8× as long as penultimate antennomere. Terminal maxillary palpomere cultriform. Pronotum opaque dorsally, flattened in dorsal aspect, elliptical, hardly wider than head across compound eyes.Anterior margin broadly rounded, truncate medially. Lateral margins slightly constricted laterally posteriad. Dorsal pronotal punctures larger and deeper than those on head, variably dense. Intervening spaces densely microstrigose, distinctly narrower than to twice as wide as punctures. Pronotal dorsal setation yellowish, dense, subdecumbent, effectively concealing dorsal sculpture of pronotum. Tactile setae sparse, erect to suberect, not longer than ordinary setae. Scutellar shield small, truncate and densely setose at posterior margin. Elytron moderately elongate, subopaque, gradually slightly narrows posteriad. Humerus broadly rounded. Postbasal transverse impression not indicated. Punctures on each elytron in anterior half arranged into seven incomplete, poorly defined rows. Intervening spaces between rows minutely punctate to microstrigose. Elytral setation dirty yellowish, moderately long and dense, directed posteriad, appressed, effectively concealing dorsal sculpture of elytron. Those setae in rows of punctures thinner and longer, directed strongly posteriad. Tactile setae not observed. Lateral humeral stria not shifted dorsad, not visible in dorsal view. Sutural stria complete, moderately broad. Metathoracic wing fully developed. Legs long. Tibia distinctly widened distally. Tibial terminal spurs paired, margins serrate. Male metatibia with somewhat longer and suberect, whitish setae on inner distal half. Basal metatarsomere longer than combined length of remaining metatarsomeres. All claws strongly dentate at base. Male tergite VII elongate, broadly rounded at posterior margin ( Fig. 47 ). Male morphological sternite VII subtriangular, rounded medially at posterior margin ( Fig. 48 ). Tergite VIII, morphological sternites VIII and IX as in Fig. 49 . Aedeagus ( Figs 50–51 ) moderately elongate, basale about twice as long as apicale. Paramere twisted, apically spatulate-like widened and rounded, external margin with denticle in apical third. Median lobe apically pentalobate with short, apically rounded median and two longer, apically pointed lateral lobes each side of it.

Sexual dimorphism. Female ( Figs 45–46 ) externally similar to male, tibiae comparatively less strongly widened distally, antennomeres 9–10 comparatively shorter, terminal antennomere elongate cylindrical, about 3.5–3.7× as long as penultimate antennomere. Female tergite VII somewhat shorter than that of male, broadly rounded at apical margin ( Fig. 52 ). Female morphological sternite VII subtriangular, rounded at posterior margin ( Fig. 53 ).

Differential diagnosis. Macratria kundratai sp. nov. is unique among all congeners in the combination of the wide frons, the externally dentate paramere, the pentalobate apex on the median lobe of aedeagus, and the female terminal antennomere being more elongate than that of male.

Ecology. Collected on a hot, open riverbank from underside and inside of leaf sheaths of reed-like riverside vegetation resembling Saccharum.

Distribution. Northern lowlands, New Guinea.

Figures

FIGURES 43–46. Macratria kundratai sp. nov. 43—Paratype ♁, habitus, dorsal view; 44—Same, forebody and right antenna, dorsal view; 45—Paratype ♀, habitus, dorsal view; 46—Same, forebody and left antenna, antero-dorsal view [not to scale].

FIGURES 47–53. Macratria kundratai sp. nov. 47—Holotype ♁, tergite VII, dorsal view; 48—Same, morphological sternite VII, ventral view; 49—Same, tergite VIII, morphological sternites VIII and IX, ventral view; 50—Same, aedeagus; 51—Same, aedeagus, apical portion; 52—Paratype ♀, tergite VII, dorsal view; 53—Same, morphological sternite VII, ventral view [not to scale].