Macratria iridescens Telnov, 2011

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 : 11-14

Macratria iridescens Telnov, 2011

( Figs 22–23 )

New material examined. 1♂ BMNH: E.DUTCH NEW GUINEA: Jutefa Bay . Pim. Sea level– 1000ft. ii.1936. L.E.Cheesman. B.M. 1936–271 .

Note. Male antennomeres 5–7 less strongly shortened in this species compared to the short, asymmetrical antennomeres eight (male antennomeres 5–8 described as “short cylindrical” in the original description ( Telnov 2011: 170). First record since the original description, first record for Indonesian New Guinea and the northern lowlands (previously only recorded from Madang and Morobe provinces of Papua New Guinea). Correct spelling for ‘Jutefa’ Bay is Youtefa.

Macratria koiari sp. nov.

urn:lsid:zoobank.org:act:60E1A7B6-0D51-48E6-909E-600B545C7CA2

( Figs 24–33 )

Type material designated. Holotype ♂ BMNH: Papua New Guinea Central Province 20 km SE Port Moresby. 19.vii.1981 J.W.Ismay. Stream bank [handwritten] // BM.1986-170 [handwritten].

Paratypes 5 specimens. 2♀ BMNH : same labels as holotype; 2♂ & 1♀ BMNH : Papua New Guinea Central Province 20 km SE. Port Moresby. 19.vii.1981 J.W.Ismay [handwritten] // BM.1986-170 [handwritten] .

Derivatio nominis. Named after the Koiari people and language of the inland Port Moresby area where the new species is coming from. Noun in apposition.

Measurements, holotype male, total body length about 3.6 mm; head length 0.7 mm, head width across compound eyes about 0.6 mm, pronotal length 0.85 mm, maximum pronotal width about 0.6 mm, elytral length 2.1 mm, combined maximum elytral width 0.9 mm. Selected male paratype 3.5 mm, female paratypes – 3.5–3.6 mm long.

Description. Male ( Figs 24–25 ). Dorsum uniformly black to black-brown, venter dark brown. Mouthparts, first five to six antennomeres, maxillary palpomeres and legs yellow or legs entirely brown. Head moderately glossy dorsally and ventrally, elliptical. Frons moderately broad, about 0.7× as wide as dorsal eye length. Compound eye large, occupying most of lateral side of head beyond antennal insertion, strongly protruding from lateral outline of head. Interfacetal setae moderately long, moderately dense. Tempus short, constricted towards head base. Head base subtruncate. Frontoclypeal suture or impression not observed. Head dorsal punctures dense, moderately deep, median area of head widely unpunctured. Intervening spaces smooth, narrower than to as wide as punctures (except on median area). Head dorsal setae greyish, nearly appressed, dense and effectively concealing dorsal sculpture of head. Tactile setae sparse, erect, longer than ordinary setae.Antenna slender and strongly filiform, extending towards mesocoxal cavity when directed posteriad. Basal antennomere elongate, about 1.4× as long as antennomere two. Antennomere three 1.2–1.3× as long as antennomere two, slightly shorter than antennomere four. Antennomeres 3–8 long and slender, 9–10 widened. Terminal antennomere elongate, apically pointed, about 3.5–3.6× as long as penultimate antennomere. Terminal maxillary palpomere cultriform. Pronotum slightly glossy dorsally and on prothoracic hypomeron, flattened in dorsal aspect, elongate elliptical, hardly narrower than head across compound eyes. Anterior margin truncate. Lateral margins shortly constricted laterally anteriad. Dorsal pronotal punctures larger than those on head, shallow, dense. Intervening spaces glossy, narrower than punctures. Pronotal dorsal setation greyish, nearly appressed, dense, effectively concealing dorsal sculpture of pronotum. Base of pronotum comparatively denser setose. Tactile setae sparse, erect, longer than ordinary setae. Scutellar shield small, truncate at posterior margin. Elytron elongate and glossy, hardly narrows posteriad. Humerus broadly rounded. Postbasal transverse impression not indicated. Punctures on elytron large, moderately deep, becoming smaller in apical half of elytron. Intervening spaces glossy, narrower than to twice as wide as punctures. Elytral setation intermixed greyish and golden, moderately long and dense, directed posteriad, effectively concealing dorsal sculpture of elytron. Non-prominent transverse spot of dense greyish setae on anterior third of elytron, not touching suture or lateral margin. Lateral humeral stria not shifted dorsad, not visible in dorsal view. Sutural stria complete, moderately broad. Metathoracic wing fully developed. Legs long. Femora clavate. Protarsus elongate, basal protarsomere somewhat thickened. Metatibia on inner margin with suberect, long, whitish setae. Tibial terminal spurs paired, serrate. Metatibial spurs long. Basal metatarsomere longer than combined length of remaining tarsomeres. All claws dentate at base. Male tergite VII elongate, narrows posteriad, pointed at posterior margin ( Fig. 27 ). Male morphological sternite VII rather short and broad, with paired, moderately long, densely setose lateral prong, posterior margin emarginate between prongs ( Fig. 28 ). Male tergite VIII, morphological sternites VIII and IX as in Fig. 29 . Aedeagus ( Figs 30–31 ) with basale about 2.5× as long as apicale. Paramere moderately long, apically rounded. Median lobe apically tripartite, its lateral prongs dorsally with a sclerotised prong.

Sexual dimorphism. Female ( Fig. 26 ) head base broadly rounded, compound eye comparatively slightly shorter, terminal antennomere about 2.6× as long as penultimate antennomere, inner margin of metatibia with comparatively shorter suberect setae. Female tergite VII rounded at posterior margin ( Fig. 32 ), morphological sternite VII subtriangular, rounded medially at posterior margin ( Fig. 33 ).

Differential diagnosis. Macratria koiari sp. nov. belongs to the gestroi species-group and is most similar to the following congeners: M. bimaculosa sp. nov. (described herein; northern lowlands, New Guinea) has the transverse band in the basal third of the elytron contrastingly pale (whitish), the aedeagus is different in this species and the lateral prongs of the male morphological sternite VII are shorter. Macratria gestroi Pic, 1901 (Papuan Peninsula, SE New Guinea) possess the apically subtruncate male tergite VII, the subtruncate, densely setose median part of the male morphological sternite VII, the widened, nearly circular paramere apex, and the contrastingly white, crescentshaped transverse band of setae in apical third of the elytron. The male tergite VII is rounded apically, the median area of the male morphological sternite VII truncate, the male and female terminal antennomere comparatively less elongate (about 3.3× as long as penultimate antennomere in male, 2.2× as long as it in female), the setae on median part of the inner margin of the male metatibia are longer and sinuous in M. laszlowagneri Telnov, 2011 (Central Moluccas). The male tergite VII rounded at posterior margin, the paramere slenderer and shorter, the transverse band of the elytra contrastingly white, the tempus comparatively shorter, the terminal antennomere in both sexes about twice as long as the penultimate antennomere in M. obiensis Telnov, 2017 (North Moluccas). Macratria pamelaschmidti Telnov, 2011 ( Solomon Islands) has the more distant lateral prongs of the male morphological sternite VII (somewhat positioned stronger laterally), and the comparatively narrower frons (about 0.6× as wide as dorsal eye length) and lacking the transverse band of setae on elytra. In Macratria pseudodensata Telnov, 2012 (southern lowlands of New Guinea) the basale of the aedeagus provided with a lateral “wing” near the transition to the apicale, the lateral prongs of the median lobe without a sclerotised prong, the median rods of the median lobe of the aedeagus nearly straight (cf. Fig. 30 for M. koiari sp. nov.), and the elytra lacking the transverse band of setae. The male metatibia lacking suberect, long setae, the male terminal antennomere about 2.7× as long as penultimate antennomere in M. sahu Telnov, 2017 (North Moluccas). The median area of the male morphological sternite VII is somewhat producing posteriad and subtruncate in M. sepik Telnov, 2011 (North New Guinea), the paramere apex is widened and strongly rounded, and the tempus is comparatively shorter.

Ecology. Unknown.

Distribution. Papuan Peninsula, SE New Guinea.

Figures

FIGURES 22–23. Macratria iridescens Telnov, 2011, ♁ from ‘Jutefa Bay’, N New Guinea. 22—Morphological sternite VII, ventral view; 23—Aedeagus [not to scale].

FIGURES 24–26. Macratria koiari sp. nov. 24—Holotype ♁, habitus, dorsal view; 25—Same, forebody, dorsal view; 26— Paratype ♀, habitus, dorsal view [not to scale].

FIGURES 27–33. Macratria koiari sp. nov. 27—Paratype ♁, tergite VII, dorsal view; 28—Same, morphological sternite VII, ventral view; 29—Same, tergite VIII, morphological sternites VIII and IX, ventral view; 30—Same, aedeagus; 31—Same, aedeagus, apical portion; 32—Paratype ♀, tergite VII, dorsal view; 33—Same, morphological sternite VII, ventral view [not to scale].