Abstract
The Neotropical Laccophilinae genus Laccodytes Régimbart, 1895 is redefined and revised. We recognize ten species, six of which are described as new. We define two species groups: the Laccodytes apalodes-group (L. apalodes Guignot, 1955, L. rondonia sp.n.), and the L. phalacroides-group (L. americanus Peschet, 1919, L. obscuratus sp.n., L. bassignanii sp.n., L. neblinae sp.n., L. olibroides Régimbart, 1895, L. phalacroides Régimbart, 1895, L. takutuanus sp.n., L. androginus sp.n.). Laccophilus pumilio LeConte, 1878, assigned to Laccodytes by Young (1954), belongs to an undescribed genus. Laccodytes species are lotic and most of them inhabit the north-eastern part of South America, apparently with Venezuela and Guyana as centre of diversity. Descriptions, illustrations and SEM photos of habitus, genitals and other diagnostic features are provided for each species, together with habitat notes, when known. We provide a key for species identification.References
Alarie, Y., Nilsson, A.N., Hendrich, L., Watts, C.H.S. & Balke, M. (2000) Larval morphology of four genera of Laccophilinae (Coleoptera: Adephaga: Dytiscidae) with an analysis of their phylogenetic relationships. Insect Systematics and Evolution, 31, 121–164.
Balfour-Browne, J. (1939) A contribution to the study of the Dytiscidae I. (Coleoptera, Adephaga). Annals and Magazine of natural History, Ser. 11, 3, 97–114.
Balke, M., Hendrich, L. & Yang, C.M. (1997) Updating the southeast Asian Neptosternus Sharp fauna (Coleoptera: Dytiscidae). The Raffles Bulletin of Zoology, 45 (2), 369–374.
Balke, M., Larson, D.J. & Hendrich, L. (1997) A review of the New Guinea species of Laccophilus Leach 1815 with notes on regional melanism (Coleoptera Dytiscidae). Tropical Zoology, 10, 295–320.
Balke, M., Larson, D., Hendrich, L. & Konyorah, E. (2000) A revision of the New Guinea water beetle genus Philaccolilus Guignot n.stat. (Coleoptera, Dytiscidae). Deutsche entomologische Zeitschrift, 47(1), 29–50.
Brancucci, M. (1983a) A new genus of the subfamily Laccophilinae (Coleoptera, Dytiscidae). Aquatic Insects, 5 (4), 251–254.
Brancucci, M. (1983b) Revision des especes est-paleartiques, orientales et australiennes de genre Laccophilus (Col., Dytiscidae). Entomologische Arbeiten aus dem Museum G. Frey, Tutzing 31–32, 241–426.
Burmeister, E.G. (1976) Der Ovipositor der Hydradephaga (Coleoptera) und seine phylogenetische Bedeutung unter besonderer Berücksichtigung der Dytiscidae. Zoomorphologie, 85, 165–257.
Franciscolo, M.E. (1994) Three new Africophilus Guignot and new records of Gyrinidae and Dytiscidae from Sierra Leone (Coleoptera). Accademia Nazionale dei Lincei, Quaderno 267, 267–298.
Guignot, F. (1937) Contribution à l'étude des Laccophilinae (Col. Dytiscidae). Bulletin de la Société entomologique de France, 42 (9), 137–143.
Guignot, F. (1955) Description de nouveaux Dytiscidae principalement de l’Amerique du Sud. Bulletin de l’Institut royal des Sciences naturelles de Belgique, 31 (27), 1–12.
Hendrich, L. & Balke, M. (1997) Taxonomische Revision der südostasiatischen Arten der Gattung Neptosternus Sharp, 1882 (Coleoptera: Dytiscidae: Laccophilinae). Koleopterologische Rundschau, 67, 53–97.
Leach, W.E. (1815) Entomology, pp. 57–172. In: Brewster D. Edinburgh Encyclopaedia. Vol. 9. Edinburgh: Balfour.
Michat, M.C. (2008) Description of the larvae of three species of Laccophilus Leach and comments on the phylogenetic relationships of the Laccophilinae (Coleoptera: Dytiscidae). Zootaxa, 1922, 47–61.
Miller, K.B. (2001) On the phylogeny of the Dytiscidae (Insecta: Coleoptera) with emphasis on the morphology of the female reproductive system. Insect Systematics and Evolution, 32, 45–92.
Nilsson, A.N. (2001) World catalogue of insects. Vol. 3. Dytiscidae Coleoptera. Stenstrup, Apollo Books, 395 pp.
Nilsson, A.N., Roughley, R.E. & Brancucci, M. (1989) A review of the genus- and family-group names of the family Dytiscidae Leach (Coleoptera). Entomologica Scandinavica, 20, 287–316.
Pederzani, F. (1995) Keys to the identification of the genera and subgenera of adult Dytiscidae (sensu lato) of the world (Coleoptera: Dytiscidae). Atti dell'Accademia Roveretana degli Agiati 244 (1994), ser. VII, IV B, 5–83.
Peschet, R. (1919) Description d’un Dytiscidae nouveaux de l'Amerique du Sud (Col.). Bulletin de la Société Entomologique de France, 1919 (8), 145–147.
Régimbart, M. (1895) Dytiscides trouves dans les Tabacs par les soins de M. Antoine Grouvelle. Annales de la Société Entomologique de France, 64, 321–348, 1 pl.
Ribera, I., Vogler, A.P. & Balke, M. (2008) Phylogeny and diversification of diving beetles (Coleoptera: Dytiscidae). Cladistics, 24 (2008), 563–590.
Sanfilippo, N. & Franciscolo, M.E. (1988) New Africophilus Guignot collected by Prof. Walter Rossi in the 1986–1987 expeditions to Sierra Leone sponsored by Accademia Nazionale dei Lincei. Bollettino della Società entomologica italiana, 120 (2), 84–100.
Sharp, D. (1882) On aquatic carnivorous Coleoptera or Dytiscidae. The Scientific Transactions of the Royal Dublin Society (2) 2, 179-1003 + pls. 7–18.
Steiner, W.E. (1981) A new genus and a new species of Laccophilinae water beetle from Ecuador (Coleoptera: Dytiscidae). The Pan-Pacific Entomologist, 57, 251–259.
Young, F. N. (1954) The water beetles of Florida. University of Florida, Studies in Biological Sciences, Series 5, 1–238.
Zimmerman, J.R. (1970) A taxonomic revision of the aquatic beetle genus Laccophilus (Dytiscidae) of North America. Memoirs of the American Entomological Society, 26, 275 pp.
Zimmermann, A. (1919) Die Schwimmkäfer des Deutschen Entomologischen Museum in Berlin-Dahlem. Archiv für Naturgeschichte, 83 (12) (1917), 107–249.
Zimmermann, A. (1920) Pars. 71. Dytiscidae, Haliplidae, Hygrobiidae, Amphizoidae. In: Schenkling, S. (ed.): Coleopterorum Catalogus. Berlin, W. Junk, 326 pp.