Laccophilus addendus Sharp, 1882

Bistroem, Olof, Nilsson, Anders N. & Bergsten, Johannes, 2015, Taxonomic revision of Afrotropical Laccophilus Leach, 1815 (Coleoptera, Dytiscidae), ZooKeys 542, pp. 1-379 : 140-143

Taxon classification Animalia Coleoptera Dytiscidae

Laccophilus addendus Sharp, 1882 Figs 108-109, 297-298, 448, 558

Laccophilus addendus Sharp 1882: 316 (original description, faunistics); v. d. Branden 1885: 20 (catalogue, faunistics); Régimbart 1895: 136, 137 (discussion, description, faunistics); Régimbart 1903: 14 (discussion); Peschet 1917: 25 (discussion, faunistics); Zimmermann 1920a:16 (catalogue, faunistics); Zimmermann 1926: 23 (faunistics, description); Bertrand 1928a: 185 (juvenile record, faunistics); Gschwendtner 1931: 180 (faunistics); Gschwendtner 1935a: 18 (faunistics); Gschwendtner 1938a: 5 (faunistics); Guignot 1946c: 271, 273, 280, 316 (description, faunistics); Vinson 1956: 28 (faunistics, list.); Guignot 1959a: 570, 576 (description, faunistics); Omer-Cooper 1965: 77, 85 (description, faunistics); Vinson 1967: 314 (faunistics, list); Bameul 1984: 94 (faunistics); Curtis 1991: 186 (faunistics); Rocchi 1991: 80, 86 (faunistics); Nilsson 2001: 240 (catalogue, faunistics); Pederzani and Rocchi 2009: 95 (faunistics, list); Nilsson 2015: 208 (catalogue, faunistics).

Laccophilus addendus v. geminatus Severin 1892: 472 (nomen nudum); Régimbart 1895: 137, 138 (original description, discussion, faunistics); Régimbart 1903: 14 (discussion); Peschet 1917: 24, 25, 55 (description, faunistics); Zimmermann 1920a:16 (catalogue, list, synonymy, Laccophilus addendus Sharp); Vinson 1956: 28 (faunistics); Omer-Cooper 1965: 85 (list, synonymy); Nilsson 2001: 240 (catalogue, faunistics, list, synonymy); Nilsson 2015: 208 (catalogue, faunistics, list, synonymy, Laccophilus addendus Sharp).

Laccophilus addendus ab. geminatus Régimbart, Guignot 1946c: 271 (description); 1959a: 576 (description, faunistics); Guignot 1961a: 931 (faunistics).

Laccophilus addendus geminatus Régimbart, Guignot 1961a: 931 (faunistics). Confirmed synonym.

Type localities.

Laccophilus addendus : Madagascar.

Laccophilus addendus var. geminatus : Madagascar.

Type material studied

(1 ex.). Laccophilus addendus : Holotype: female: "Madagascar 591 / Sharp Coll. 1905-313 / Type 591 Laccophilus addendus Madagascar" (BMNH; from original description it appears that type material contains only this specimen).

Laccophilus addendus v. geminatus (5 exs. with type status unclear): "Annanarivo Sikora Res(?) Régimb. -91 / Laccophilus geminatus Rég. sp. n. type" (3 exs. IRSNB); "Tananarive / Museum Paris Coll. Maurice Régimbart 1908 / v. geminatus Rég.” (2 exs. MNHN). [Comments: labelled, in part, as types but label data do not exactly fit with information given in the original description.]

Additional material studied

(54 exs.). Madagascar: "Suberbieville Breuning coll." (2 exs. MRAC, 1 ex. MZH); "Tsarafidy Breuning coll." (1 ex. MRAC); "Maroansetra E. le Moult" (1 ex. RMNH); "E Mad., Ampamoho nr Andilamena 1200-1300 m asl, 18-20.1. 1995 Dunay & Janak leg" (1 ex. NMW); "Fenerive, foret Tampolo 28.12. 1998 Moravec leg." (1 ex. NMW, 1 ex. MZH); "Ft Dauphin (Tulear) Mandena (QMM area) / Pond at right border of Riv. Maendano, 13.9.2001, 10 m asl., 21.6˚C, 0.211 mS/cm / Gerecke & Goldsmith leg." (3 exs. BMNH, 1 ex. MZH; habitus in Fig. 448); "Betsiboka Bas, Loc. Manjkavararadrano Marmokomita Riv., 46, 54°20'E / 17° 38'00"S, alt 625, 16.4.1991 leg. ORSTOM" (1 ex. NMW); "Fianarantsoa Prov., Foret d’Ananalava 29.6 km. 280°, W Ranhohira, elev. 700 m 1-5.2. 2003/ 22°35'30"S, 045°07'42"E, Griswold et al., at light, in tropical dry forest" (1 ex. CAS); "TOLI, Zombitse Ankilemiletsy: muddy waterhole, N: -22.868, E: 44.576, 544 m 14.5. 2006 Bergsten leg. / BMNH(E) <794166, 794206, 794209> DNA voucher / Laccophilus addendus det. Bergsten" (3 exs. NHRS); "TOLI, Manakaravavy, Manakaravavy Riv., Dried out river P49: N: -24.52, E: 44.623, 218 m, 18.5. 2006 Bergsten et al. leg. / BMNH(E) <794207> DNA voucher / Laccophilus addendus det. Bergsten" (1 ex. NHRS); TOA, Moramanga, Andasibe, Andasibe NP Lenti, N: -18.935, E: 48.417, 933 m, 5.1. 2007, Isambert leg. / BMNH(E) <830996> MSL402:C5, DNA voucher / Laccophilus addendus det. Bergsten" (1 ex. NHRS); "Andasibe, NP Perinet 1250 m, Pfütze im Urvald 5.12. 2000, W. Dolin" (8 exs. NHRS); "Isaky Ivondro, Foret Managotry, Lotic, N: -24.799, E: 46.862, 406 m, 9.4. 2007, Ranarilalatiana leg. / DNA voucher BMNH(E)<831007> MSL 402:C9 / Laccophilus addendus det. Bergsten" (1 ex. NHRS); "Isalo, Source of Piscine Naturelle, waterholes, N: -22.553, E: 45.368, 2312 m, 12.5. 2006, Isambert et al. leg. / DNA Voucher BMNH(E) <831005, 831007>MSL402:C1 / Laccophilus addendus det. Bergsten" (2 exs. NHRS); "Sambava, Marojejy, Marojejy NP, Lentic, N: -14.457, E: 49.79, 162 m, 10.12. 2006, Isambert et al. leg. / DNA Voucher BMNH(E) <830992>MSL402:C1 / Laccophilus addendus det. Bergsten" (1 ex. NHRS); "Mahajanga Melaky btw Morafenobe-Ambohijanahary N-18.19091, E045.19986, 290 m.a.o. 19.12.2009 water net, field, Bergsten et al" (1 ex. NHRS); same data, add "NHRS-JLKB 000000500"(1 ex. NHRS); "Antsianaka Perrot Freres 1er semester 1892" (5 exs. ZMHB); "SW Madagascar Andranohinaly, Voeltskov S." (1 ex. ZMHB); "Mahajanga Melaky, Tsingy de bemaraha NP, S19.14114, E044.81245, 45 m.a.o., 14.12. 2009, water net, field, Bergsten et al./NHRS-JKLB 000000495" (1 ex. NHRS); "Toliara Menabe Menabe RS N-19.92773, E045.52253, 102 m.a.o. 10.12. 2009 water net, field Bergsten et al" (1 ex. NHRS); same data, add "000000471 NHRS-JLKB" (1 ex. NHRS); "Tamatava Prov., 3.3 km N Ambabasoratra 31.8. 1962 Cashatt" (1 ex. USNM); "Andohahela NP, Tsimelahy, pools in creek 15-16.11. 2007, 24°57'13.69"S, 46°37'23,30"E Stastny" (1 ex. NHRS); "Reserve de Perinet 29.5. 1991, forestra pluviale, L. Bartolozzi leg." (2 exs. CSR); "Tamatava Pr. 3 km E Perinet 2.4.1963 Cashatt" (1 ex. NHMB); "Pr. Tananarive, env. Arivonimamo 22.7.1970 Pederzani" (1 ex. NHMB); "Env. Tananarive 7. 1934 Olsoufieff / Lac Tsimbazaza" (1 ex. MNHN); "Pr. Tamatave, Foret de Perinet 17.7. 1970 Pederzani" (1 ex. NHMB); "Tamatave (Toamasina) Park Ivoloina, Pfütze auf Strasse im Wald 21.11. 2000 Dolin" (1 ex. NHRS); "SW Mad. Andranohilany Voeltzkow / Laccophilus addendus Sharp det. Brancucci 1982" (1 ex. NHMB); "Pays Androy nord Alluaud 1900" (2 exs. MNHN); "Vatomandry 8. 1934 Vadon" (1 ex. MNHN).

Comments on synonymy.

No justification to distinguish a varation ( var. geminatus ) to Laccophilus addendus has been detected. Accordingly earlier synonymization by Zimmermann (1920) is considered valid.

Diagnosis.

Laccophilus addendus is characterized by peculiar elytral colour pattern and shape of penis. Elytra with evenly distributed irrorations but at base with irregular longitudinally shaped pale areas. Penis strongly curved and apex evenly broad to abrupt end. Shape of penis is different from all African Laccophilus species.

Description.

Body length 3.8-4.1 mm, width 2.2-2.3 mm. Habitus and dorsal colour pattern (Fig. 448).

Head: Pale ferrugineous to pale brown. Finely reticulated, slightly mat. Reticulation double; large meshes contain two to six smaller meshes. Sometimes double reticulation in part somewhat indistinct; large meshes strongly reduced, rather indistinct. Punctation extensively absent or indistinct; at eyes fine punctures may be discerned.

Pronotum: Pale ferrugineous. At foremargin (between eyes) dark ferrugineous. Basally at midline with two small dark ferrugineous spots. Submat, finely reticulated and reticulation double. Large meshes, when discernible, contain 2-6 small meshes. Extensively impunctate; frontally fine, rather sparse punctures may be discerned.

Elytra: Pale ferrugineous. Colour pattern consists of extensive dark, irrorations; subbasally dark irrorations sparse forming a pale, transverse, irregular area (Fig. 448). Submat, finely reticulate. Double reticulation rather indistinct; only in part of elytral disc clearly discernible. Almost impunctate; scattered, very fine punctures discernible. Lateral, pre-apical furrow fine, finely pubescent.

Ventral aspect: Pale ferrugineous to ferrugineous. Metacoxal plates somewhat darker; sometimes plates vaguely darker only close to margins. Shiny, submat, very finely reticulated. Basal ventrites with fine, curved striae. Almost impunctate. Prosternal process slender, apex only slightly extended, pointed. Metacoxal plates with shallow, transversely located furrows, which are anteriorly quite distinct, posteriorly indistinct (fade away). Apical ventrite medially keeled; with a small knob on one side (Fig. 108).

Legs: Pro- and mesotarsus slightly enlarged; with suckers. Claws slender, slightly curved and almost equally long.

Male genitalia: Penis in lateral aspect quite slender, medially distinctly bent; extreme apex straight and simple, unmodified. In dorsal aspect penis apex ends abruptly (Figs 297-298).

Female: Apical ventrite medio-apically keeled (Fig. 109). Pro- and mesotarsus slender.

Distribution.

Madagascar (Fig. 558). Records from mainland of Africa are considered uncertain.

Collecting circumstances.

Insufficiently documented. Sampled at light in tropical dry forest. Also reported from a pond and a muddy waterhole.