Aporhina Boisduval, 1835

Legalov, Andrei A., 2024, Two new species of the genus Aporhina Boisduval, 1835 (Coleoptera: Brentidae) from New Guinea, Ecologica Montenegrina 80, pp. 180-187 : 181-187

Genus: Aporhina Boisduval, 1835

Type species: Aporhina bispinosa Boisduval, 1835 by monotypy

Aporhina sorongensis sp. n. ( Fig. 1 )

https://zoobank.org/ urn:lsid:zoobank.org:act:31B46ABB-FD04-478D-BDBC-CA817C632BBF

Type material: Holotype: male ( ISEA), Indonesia, Southwest Papua, Sorong, Salawai , VIII.2020 . Paratype: female ( ISEA), idem .

Description. Body black, with blue sheen, covered with very sparse, appressed, pale, short setae. Femora and base of first antennomere rufous. Sides of procoxal part of prosternum, mesanepisternum, mesepimeron, mesoventral process, apical half of metanepisternum, sides of metaventrite and apex of elytron with maculae of condensed white squamules. Male. Rostrum slightly arcuate, subcylindrical, 3.5 times as long as wide at apex and at base, about 3.7 times as long as wide in mesorostrum, about 1.1 times as long as pronotum, finely punctate from apex to end of mesorostrum, further more densely punctate. Mesorostrum slightly dilated. Antennal scrobes deep, long, directed to eye. Their lower edge granulated. Forehead impressed, 0.8 times as narrow as rostrum base width, finely punctate. Eyes large, rounded, slightly protruding from contour of head, finely faceted. Temple slightly longer than eye length, finely transverse-rugose. Antennae straight, inserted ventro-laterally on apical third of rostrum, rather long, extend beyond middle of pronotum. Funicle 7-segmented. First antennomere elongate conical, about 2.3 times as long as wide at apex. Second to sixth antennomeres subconical. Second antennomere 1.6 times as long as wide in middle, about 0.6 times as long as and about 0.8 times as narrow as first antennomere. Second-fifth antennomeres of same width. Third antennomere about 1.7 times as long as wide at apex, slightly longer than second antennomere. Fourth antennomere about 1.7 times as long as wide at apex, slightly shorter than third antennomere. Fifth antennomere about 1.5 times as long as wide at apex, about 0.9 times as long as fourth antennomere. Sixth antennomere about 1.4 times as long as wide at apex, slightly shorter and wider than fifth antennomere. Seventh and eight antennomeres suboval. Seventh antennomere about 1.2 times as long as wide at apex, slightly shorter and wider than sixth antennomere. Eighth antennomere about 1.1 times as long as wide at apex, same length as and slightly wider than seventh antennomere. Club elongate and noncompact, consists of ninth-eleventh antennomeres, about 1.2 times as long as second-eighth antennomeres combined, covered with dense adpressed pale setae. Ninth antennomere about 1.5 times as long as wide at apex, 2.0 times as long as and 1.5 times a wide as eighth antennomere. Tenth antennomere about 1.2 times as long as wide in middle, 0.8 times as long as and same width as ninth antennomere. Eleventh antennomere about 4.8 times as long as wide a base, about 3.6 times as long as and about 0.9 times a narrow as tenth antennomere. Pronotum long-campaniform, about 1.3 times as long as wide at apex, about 1.1 times as long as wide at middle and about 1.4 times as long as wide at base, with weak subapical constriction, lacking broad collar before base. Broadest width before middle. Sides slightly rounded. Disc convex, sides finely punctate, conspicuously sculptured in middle. Scutellum triangular, finely transversely rugose. Elytra back suboval, convex, about 2.5 times as long as wide at humeri, about 2.1 times as long as wide in thornlike process, about 3.1 times as long as wide in apical quarter, about 2.9 times as long as pronotum. Each elytron with single, large, sharp, thornlike, dorsal process in middle. Greatest width beyond middle. Base of elytron triangularly elongated towards scutellum. Humeri weak. Striae distinct with quite large punctures. Interstriae quite wide, slightly convex, finely punctate. First and second interstria with tubercle behind scutellum. Precoxal portion of prosternum short, about 0.4 times as long as postcoxal portion. Postcoxal portion quite long, about 0.6 times as long as precoxal portion. Pro- and mesocoxal cavities rounded. Procoxal cavities continuous. Mesocoxal cavities narrowly separated. Metacoxal cavities transversely extended. Metaventrite about 1.7 times as long as metacoxal cavity length, slightly convex, finely rugose-punctate. Metanepisternum narrow. First and second ventrites fused, finely rugose-punctate, with curved suture between them. First ventrite slightly longer than metacoxal length. Second ventrite about 1.3 times as long as first ventrite. Third-fifth ventrites flat, positioned in different plane than first and second ventrites, densely rugose-punctate. Third and fourth ventrites of same length. Third ventrite about 0.3 times as long as second ventrite. Fifth ventrite convex, 3.6 times as long as fourth ventrite, finely punctate. Legs long. Procoxae conical. Mesocoxae slightly elongate. Metacoxae convex. Trochanters not elongate. Femora slightly clavate. Profemora with subapical tooth on ventral surface. Tibiae almost straight, rather thick, with truncate apices. Apices of protibiae expanded and dorsally deeply notched on inside, with spur. Meso- and metatibiae with two spurs. Tarsi long. First-third tarsomeres with erect setae dorsally. First tarsomere elongate-conical. Second tarsomeres conical, shorter and wider than first tarsomere. Third tarsomere bilobed. Fifth tarsomere long. Claws relatively large, free, divergent, without teeth. Total body length (without rostrum) 9.4 mm. Length of rostrum 2.3 mm. Female. Rostrum about 3.4 times as long as wide at apex, about 4.2 times as long as wide in mesorostrum, 3.8 times as long as wide at base, about 1.2 times as long as pronotum. Forehead 0.7 times as narrow as rostrum base width. Temples about 1.3 times as long as eye length. Antennae inserted a little further from rostrum apex of male. First antennomere about 2.7 times as long as wide at apex. Second antennomere about 1.7 times as long as wide at apex, 0.6 times as long as and about 0.9 times as narrow as first antennomere. Third antennomere about 1.6 times as long as wide at apex, about 0.7 times as long as and about 0.9 times as narrow as second antennomere. Fourth and fifth antennomeres of same width. Fourth antennomere about 1.9 times as long as wide at apex, about 1.3 times as long as and about 1.1 times as wide as third antennomere. Fifth antennomere about 1.5 times as long as wide at apex and about 0.8 times as long as fourth antennomere. Sixth-eight antennomeres of same length. Sixth antennomere about 1.2 times as long as wide at apex and about 0.9 times as long as and slightly wider than fifth antennomere. Seventh antennomere subequal to sixth antennomere. Eighth antennomere about 1.1 times as long as wide at apex and slightly wider than seventh antennomere. Club about 1.2 times as long as second-eighth antennomeres combined. Ninth antennomere about 1.6 times as long as wide at apex, about 2.2 times as long as and 1.5 times a wide as eighth antennomere. Tenth antennomere about 1.3 times as long as wide in middle, about 2.9 times as long as and of same width as ninth antennomere. Eleventh antennomere about 4.3 times as long as wide at base, about 1.1 times as long as and slightly shorter than ninth antennomere. Pronotum about 1.2 times as long as wide at apex, about 1.1 times as long as wide in middle and about 1.3 times as long as wide at base. Elytra about 2.5 times as long as base width, about 2.0 times as long as wide in middle, about 3.1 times as long as wide in apical quarter, about 3.0 times as long as pronotum. Precoxal portion 0.3 times as long as postcoxal portion. Postcoxal portion about 0.7 times as long as procoxal cavity length. Metaventrite about 1.9 times as long as metacoxal cavity length. First ventrite of same length as metacoxal cavity length. Second ventrite about 1.5 times as long as first ventrite, with maculae of condensed white squamules. Third and fourth ventrites equal in length. Third ventrite about 0.3 times as long as second ventrite. Fifth ventrite 2.5 times as long as fourth ventrite. Total body length (without rostrum) 9.2 mm. Length of rostrum 2.3 mm.

Etymology. The epithet of this new species is dedicated from the Sorong locality.

Localisation. Indonesia (Southwest Papua).

Comparison. The new species is similar to Aporhina bispinosa Boisduval, 1835 but differs in the pronotal disc which is conspicuously sculptured in the middle, the shorter rostrum and the larger punctures in the elytral striae.

Aporhina zimmermani sp. n. ( Fig. 2 )

https://zoobank.org/ urn:lsid:zoobank.org:act:5419FC56-32CC-464A-A88D-98A4467CDEA1

Type material: Holotype: male ( ISNB), “Coll. R. I. Sc. N. B., D. Neu- Guinea, Wahnes Franklin Müller”, “det. Chalcocybebus australis Hell. ” . Paratype: female ( ISNB), “Coll. R. I. Sc. N. B., D. NeuGuinea, Wahnes Franklin Müller” .

Description. Male. Body black, without metallic lustre, glabrous. Femora rufous. Antennae, coxae, trochanters, tibiae and tarsi brownish. Sides of procoxal part of prosternum, mesanepisternum, mesepimeron, mesoventral process, most of metanepisternum, sides of metaventrite and with maculae of condensed yellowish squamules. Scales form six quite large maculae on each elytron. Rostrum slightly arcuate, subcylindrical, 3.5-4.1 times as long as wide at apex, 3.8-3.9 times as long as wide in mesorostrum, 3.6-4.0 times as long as wide at base, 1.1-1.3 times as long as pronotum, finely punctate from apex to end of mesorostrum, further more densely punctate. Mesorostrum slightly dilated. Antennal scrobes deep, long, directed to eye. Their lower edge granulated. Forehead impressed, 0.7-0.8 times as narrow as rostrum base width, finely punctate. Eyes large, rounded, slightly protruding from contour of head, finely faceted. Temples about 1.2 times as long as eye length, finely transverse-rugose. Antennae straight, inserted ventro-laterally on apical third of rostrum, rather long, extend beyond middle of pronotum. Funicle 7-segmented. First antennomere elongate-conical, about 2.4 times as long as wide at apex. Second-sixth antennomeres subconical. Second antennomere 1.4 times as long as wide in middle, about 0.5 times as long as and about 0.9 times as narrow as first antennomere. Third-fifth antennomeres of same width. Third antennomere about 1.7 times as long as wide at apex, about 1.1 times as long as and about 0.9 times as narrow as second antennomere. Fourth antennomere about 1.9 times as long as wide at apex, slightly longer than third antennomere. Fifth antennomere about 1.7 times as long as wide at apex, slightly shorter than fourth antennomere. Sixth antennomere about 1.4 times as long as wide at apex, about 0.8 times as long as and slightly wider than fifth antennomere. Seventh and eight antennomeres suboval. Seventh antennomere about 1.3 times as long as wide at apex, of same length and slightly wider than sixth antennomere. Eighth antennomere almost equal in length and width, about 0.9 times as long as and slightly wider than seventh antennomere. Club elongate, about 1.3 times as long as second-eighth antennomeres combined, covered with dense adpressed pale setae. Ninth antennomere about 1.3 times as long as wide at apex, about 2.2 times as long as and about 1.7 times a wide as eighth antennomere. Tenth antennomere about 1.3 times as long as wide in middle, about 0.9 times as long as and slightly narrower than ninth antennomere. Eleventh antennomere 5.0 times as long as wide a base, about 3.5 times as long as and slightly narrower than tenth antennomere. Pronotum long-campaniform, about 1.2 times as long as wide at apex, about 1.0 times as long as wide in middle and 1.2-1.3 times as long as wide at base, with weak subapical constriction, lacking broad collar before base. Greatest width before middle. Sides slightly rounded. Disc convex, finely punctate in sides, conspicuously sculptured in middle. Scutellum triangular, finely transverse-rugose. Elytra back suboval, convex, about 3.5 times as long as width at humeri, 1.9-2.1 times as long as wide in thornlike proces, 3.3-3.4 times as long as wide in apical quarter, 2.9-3.1 times as long as pronotum. Each elytron with single, large, sharp, thornlike, dorsal process in middle. Greatest width beyond middle. Base of elytron triangularly elongated towards scutellum. Humeri weak. Striae distinct with quite small punctures. Interstriae quite wide, slightly convex, finely punctate. First and second interstriae with weak tubercle behind scutellum. Precoxal portion of prosternum short, about 0.5 times as long as postcoxal portion. Postcoxal portion quite long, of same length as precoxal portion. Pro- and mesocoxal cavities rounded. Procoxal cavities continuous. Mesocoxal cavities narrowly separated. Metacoxal cavities transversely extended. Metaventrite 2.0-2.6 times as long as metacoxal cavity length, slightly convex, finely rugose-punctate. Metanepisternum narrow, about 6.7 times as long as wide in middle. First and second ventrites fused, finely rugose-punctate, with curved suture between them. First ventrite of same length as metacoxal length. Second ventrite 1.1-1.3 times as long as first ventrite. Third-fifth ventrites flat, positioned in different plane than first and second ventrites, densely rugose-punctate. Third and fourth ventrites of same length. Third ventrite 0.3-0.4 times as long as second ventrite. Fifth ventrite convex, 2.6-2.8 times as long as fourth ventrite, finely punctate. Legs long. Procoxae conical. Mesocoxae slightly elongate. Metacoxae convex. Trochanters not elongate. Femora slightly clavate. Profemora with subapical tooth on ventral surface. Tibiae almost straight, rather thick, with truncate apices. Apices of protibiae expanded and dorsally deeply notched on inside, with spur. Meso- and metatibiae with two spurs. Tarsi long. First-third tarsomeres with erect setae dorsally. First tarsomere elongate-conical. Second tarsomeres conical, shorter and wider than first tarsomere. Third tarsomere bilobed. Fifth tarsomere long. Claws relatively large, free, divergent, without teeth. Total body length (without rostrum) 9.0- 9.6 mm. Length of rostrum 2.5-2.8 mm.

Etymology. The epithet of this new species is dedicated to the late Dr. E.C. Zimmerman ( Australia).

Localisation. Papua New Guinea.

Comparison. The new species is similar to Aporhina australis ( Heller, 1896) but differs in the larger maculae of the condensed yellowish squamules on the elytra, a shorter and thicker rostrum, and a weak basal tubercle on the first and second interstriae.

Acknowledgements

The author thanks Dr. Pol Limbourg (Institut Royal des Sciences Naturelles de Belgique), Mr. Olaf Jaeger and Dr. Klaus-Dieter Klass (Senckenberg Naturhistorische Sammlungen Dresden) for providing material of the Aporhina for study, and anonymous reviewers for improving the overall quality of the manuscript.

References

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Figures

Figure 1. Aporhina sorongensis sp. n.: a – holotype, male, habitus, dorsal view; b – holotype, male, habitus, ventral view; c – paratype, female, habitus, dorsal view; d – holotype, aedeagus, dorsal view; e – holotype, aedeagus, ventral view; f – tegmen; g – holotype, male, abdomen; h – holotype, male, habitus, lateral view; i – paratype, female, habitus, lateral view; j – holotype, male, habitus, frontal view; k – holotype, aedeagus, lateral view, right; l – holotype, aedeagus, lateral view, left. Scale bar = 5.0 mm for a-c, g-j, 1.0 mm for d-f, k-l.

Figure 2. Aporhina zimmermani sp. n.: a – holotype, male, habitus, dorsal view; b – holotype, male, habitus, ventral view; c – paratype, male, habitus, dorsal view; d – paratype, male, habitus, ventral view; e – holotype, male, habitus, lateral view; f – paratype, male, habitus, lateral view; g – holotype, male, habitus, frontal view; h – holotype, tegmen; i – holotype, aedeagus, dorsal view; j – holotype, aedeagus, ventral view; k – holotype, male, habitus, lateral view; l – holotype, male, abdomen. Scale bar = 5.0 mm for a-d, f-g, l, 2.0 mm for e, 1.0 mm for hk.