Papuaepilachna nasti (Bielawski)

Szawaryn, Karol & Tomaszewska, Wioletta, 2013, Two new genera of Epilachnini Mulsant from New Guinea and Aru Islands (Coleoptera: Coccinellidae), Journal of Natural History (J. Nat. Hist.) 47 (37 - 38), pp. 2427-2457 : 2443-2447

Papuaepilachna nasti (Bielawski)

( Figures 7A–I , 8A–Q , 15F )

Afidentula nasti Bielawski, 1963: 433 .

Material

Holotype male. Papua New Guinea: “Melambi. R. Lae, N. G., Mirilunga Vill. 1370 m (4500 ′), 16 / 6 / 57, Native Gardens, Coll. J. H. Ardley, 680, C. L. E. Coll. No. / 5521, Holotypus, Pres by Com Inst. Ent. BM 1958-1, Epilachna nasti sp. n., det. R. Bielawski 1958, Type” ( BMNH).

Paratypes. Papua New Guinea: “ Neu-Guinea Cromwelgebrige / ex coll. F. Kessel Mus. Zool Polonicum Warszawa 19 / 45 / Inst. Zool. P.A.N. Warszawa Allotypus / Epilachna nasti sp. nov. det. R. Bielawski 1958 / prep. genit. N: 1424 R. Bielawski 1956” (1 female: MIZ) ; “ Htid. v. Finsohhafen 1.30 L. Wagner S. / Paratypus / Afidentula nasti sp. nov. det R. Bielawski 1961” (1 female: MIZ) ; “ New Guinea (Neth.), Wisselmeren, 1500 m, Itouda Kamo V. Aug. 14. 1955 / J.L Gressit collector / Paratypus / Afidentula nasti sp. n., paratypus, det. R. Bielawski 1962” (1: BPBM); New Guinea, (NE), Bulolo 1020 m. 20 August 1956 / E.J. Ford, Jr. collector / Paratypus / Afidentula nasti sp. n., Paratypus, det. R. Bielawski 1962” (2: BPBM) ; same but 24 August 1956 (1: BPBM) ; “ New Guinea (NE), Nonduglo 1600 m, 8 July 1956 / Light trap, J.L. Gressit / Paratypus / Afidentula nasti sp. n. paratypus, det. R. Bielawski ” (1: BPBM) ; same but “ July 9 1955 / Inst. Zool. P.A.N. Warszawa 56 / 62” (1 male: MIZ) ; “ New Guinea (NE), Baindoang Salawaket Range, 1800 m, 15 September 1956 / E.J. Ford Jr. collector / paratypus / Afidentula nasti sp. n., paratypus, det. R. Bielawski 1962” (2: BPBM) ; same but Inst. Zool P.A.N. Warszawa 56 / 62 (2 females: MIZ) ; “ New Guinea: Papua , Owen Stanley Range , Goilala: Tororo 1560 m, 21–24 February 1958 / W.W. Brandt collector, Bishop / Paratypus / Afidentula nasti sp. n. paratypus, det. R. Bielawski ” (1: BPBM; 2 males: MIZ) ; “ New Guinea: NE W. Highlands: Hagen SE of Kornfarm, 15 October 1958 / J.L. Gressitt collector, Paratypus / Afidentula nasti sp. n. paratypus det. R. Bielawski 1962 / Inst. Zool. P.A.N. Warszawa 56 / 62” (1 female: MIZ) ; “ New Guinea: NE, W. Highlands: Korn Farm, 1560 m, 19 October 1958 / J.L. Gressit collector / Paratypus / Afidentula nasti sp. n., paratypus, det. R. Bielawski 1962” (1: BPBM) ; “ New Guinea: NE, Finisterre Range , Saidor: Funyende, 1200 m, 24– 30 September 1958 / W.W. Brandt collector, Bishop / Paratypus / Afidentula nasti sp. n., paratypus, det. R. Bielawski 1962” (1: BPBM) ; same but “ Inst. Zool. P.A.N. Warszawa 56 / 62” (1 female: MIZ) ; “ New Guinea: NE, Kassam, 1350 m, 48 km E. of Kainantu, 30 October 1959 / T.C. Maa collector, Bishop / paratypus / Afidentula nasti sp. n., paratypus, det. R. Bielawski ” (2: BPBM) ; “ New Guinea: NE, Mòife 2100 m., 15 km NW of Okapa, 7–14 October 1959 / T.C. Maa collector, Bishop / Paratypus / Afidentula nasti sp. n., paratypus, det. R. Bielawski, 1962” (1: BPBM) ; “ New Guinea: NE, Kliptami Valley, 1200–1350 m. 1–15 August 1959 / W.W. Brandt collector, Bishop / Paratypus / Afidentula nasti sp. n., paratypus, det. R. Bielawski 1962” (1: BPBM) .

Other material. Papua New Guinea: north-east Western Highlands: Goiburung; east of Korn Farm 1560–1650 m, 16 October 1958, J.L. Gressitt Coll., Afidentula nasti (Biel.) (1 male: MIZ) ; north-east, Baindoang Salawaket Range 1800 m. 15 September 1956, E.J. Ford Jr. Coll., Afidentula nasti (Biel.) (1 male: MIZ) ; north-east Kilolo Creek near Wau , 900–1000 m, August 1968, N. I. H. Krauss Collector (1 male: BPBM) ; Morobe Distr. Wau , 2 July 1974, 1150 m, Gewise Otaweto coll’r. Wau Ecology Inst., Bishop Museum Acc. No. 1976.186, Pipturus (1 male: BPBM) .

Diagnosis

This species can be distinguished from all its congeners by its characteristic mandible provided with large tooth in molar area and by basal labial palpomere longer than wide. By overall size, shape and colouration Papuaepilachna nasti is most similar to P. kapuri but can be distinguished from it by having (apart from above-mentioned

characters) appressed pubescence, parallel sided prosternal process and regularly curved abdominal postcoxal lines.

Description

Length 5.8–7.4 mm; TL / EW = 1.14–1.23; PL / PW = 0.38–0.44; EL / EW = 1.02–1.06; EW / PW = 1.77–2.00.

Body ( Figures 8A , 15F ) elongate-oval, convex; surfaces covered with short, appressed pubescence. Body black with only mouthparts (except for terminal maxillary palpomere) and antennomeres 2–8 yellowish-brown; anterior angles of pronotum may be very narrowly yellow.

Antenna ( Figure 7A ) with antennomeres 4–7 weakly transverse, subequal in length; antennomere 8 longer and wider than antennomeres 4–7, as long as wide, widening anteriorly. Mandibles with two large apical and one small subapical, wide, chisel-like tooth; molar area provided with large triangular tooth ( Figure 7C, D ). Labrum deeply emarginate medially at apex ( Figure 7B ). Labial palp with all palpomeres elongate ( Figure 7E ); palpomere 1 about 0.75 times length of palpomere 2; terminal palpomere about 1.25 times as long as subterminal one. Terminal maxillary palpomere about as long as wide ( Figure 7H ). Galea and lacinia covered with very long setae.

Prosternal process ( Figure 8B ) subtruncate at apex, parallel sided; width of prosternal process about 1.5 times greater than length of prosternum in front of procoxae. Mesoventral process about as wide as coxal diameter at the same position ( Figure 8C ).

Legs with hind femora not protruding from outer margin of elytral epipleuron ( Figure 8A ).

Abdominal postcoxal lines regularly curved ( Figure 8H, I ); male ventrite 5 as long as ventrite 4, apical margin of ventrite 5 truncate Figure 8I ), ventrite 6 scarcely emarginate, tergite VIII rounded ( Figure 8F, G ); apical margin of female ventrite 5 subtruncate ( Figure 8H ), sternite and tergite VIII rounded ( Figure 8D, E ).

Male terminalia and genitalia ( Figure 8M–Q ). Tergite IX divided dorsally. Penis guide longer than parameres; apex pointed from outer view. Parameres slightly widening apically. Tegminal strut about 0.5 times shorter than penis guide and basal piece combined. Penis straight, narrowing anteriorly; apex pointed.

Female genitalia as in Figure 8J–L with coxites transversely oval.

Remarks

One of the examined specimens bears a label “ Pipturus ”. It is not clear whether plant of this genus of the family Urticaceae is a host plant for P. nasti or just this specimen was caught on it. Information about host plants of Epilachnini is so limited that it is worth noting this fact.

Figures

Figure 7. Papuaepilachna nasti (Bielawski). (A) Antenna; (B) labrum; (C) mandible, dorsal; (D) mandible, ventral; (E) labium; (F) head; (G) head, ventral; (H) maxilla; (I) tarsal claw.

Figure 8. Papuaepilachna nasti (Bielawski). (A) Habitus, ventral; (B) prosternal process; (C) mesoventral process; (D) tergite VIII, female; (E) sternite VIII, female; (F) tergite VIII, male; (G) ventrite 6, male; (H) abdomen, female; (I) abdomen, male; (J) female genitalia, dorsal; (K) spermatheca and accessory gland; (L) female genitalia, ventral; (M) male genital segment, ventral; (N) male genital segment, dorsal; (O) penis, lateral; (P) tegmen, lateral; (Q) tegmen, inner.

Figure 15. Habitus: (A) Papuaepilachna wiebesi (Bielawski); (B) Papuaepilachna tenmana (Bielawski); (C) Lalokia aruensis (Crotch); (D) Papuaepilachna watalai (Jadwiszczak); (E) Papuaepilachna kapuri (Bielawski); (F) Papuaepilachna nasti (Bielawski); (G) Papuaepilachna bivakana (Bielawski).