A new species of Bidessus from Anjozorobe-Angavo and a review of Malagasy Bidessus (Coleoptera, Dytiscidae)

  • Johannes Bergsten Department of Zoology, Swedish Museum of Natural History, Box 50007, SE-10405 Stockholm https://orcid.org/0000-0002-6153-4431
  • Tolotra Ranarilalatiana Department of Entomology, Faculty of Sciences, Box 906, University of Antananarivo, 101 Antananarivo https://orcid.org/0000-0002-0371-2893
  • Olof Biström Finnish Museum of Natural History, Zoology Unit, P.O. Box 17, FI-00014 University of Helsinki
Keywords: aquatic insects, protected area, Madagascar, alpine, Bidessini

Abstract

We review the species of Bidessus of Madagascar and describe Bidessus anjozorobe sp. nov. from material collected in Anjozorobe forest. Anjozorobe is part of the Anjozorobe-Angavo Protected Area, which is an important corridor of transition forest between typical eastern humid forests and the residual sub-humid forest of the Central Highlands. Bidessus longistriga Régimbart, 1895 and Bidessus perexiguus Kolbe, 1883 are widespread but endemic low-altitude species on Madagascar. Bidessus nesioticus Guignot, 1956 is an alpine species described from near the peak of the Ankaratra mountain massifs at 2500 m a.s.l. We recollected the species for the first time since its description, in Ankaratra and in a new area above 2000 m a.s.l. in the Andringitra mountain further south. Bidessus cf. nero Gschwendtner, 1933 is tentatively recorded for Madagascar for the first time but further studies are needed to test the status of mainland and insular populations. Bidessus apicidens Biström & Sanfilippo, 1986 has not been recollected on Madagascar since 1970. All species are endemic to Madagascar except potentially Bidessus cf. ceratus and Bidessus cf. nero described from Uganda and the Democratic Republic of the Congo, respectively. The older records of the two non-endemic species Bidessus complicatus Sharp, 1904 and Bidessus ovoideus Régimbart, 1895 on Madagascar could not be verified.

References

Alluaud C. 1900. Liste des insectes coléoptères de la région malgache. In: Grandidier A. (ed.) Histoire physique, naturelle et politique de Madagascar volume 21, Histoire naturelle des Coléoptères, tome I, texte, 1er partie: 56–76. Imprimerie nationale, Paris. https://doi.org/10.5962/bhl.title.1599

Bergsten J., Manuel M., Ranarilalatiana T., Ramahandrison A.T. & Hájek J. In press. Dytiscidae, diving beetles, tsikovoka. In: Goodman S.M. (principal editor). The Natural History of Madagascar, 2nd Ed. The University of Chicago Press, Chicago.

Biström O. 1985. A revision of the species group B. sharpi in the genus Bidessus (Coleoptera, Dytiscidae). Acta Zoologica Fennica 178: 1–40.

Biström O. & Sanfilippo N. 1986. Bidessus apicidens sp. n., and faunistic notes on the genus from Africa (Coleoptera, Dytiscidae). Annales Entomologici Fennici 52: 46–47.

Gschwendtner L. 1933. Neue Schwimmkäfer aus Belgisch Kongo. IV. Teil. Revue de Zoologie et botanique africaines 23: 84–95.

Guignot F. 1941. Description de nouveaux Dytiscidae d’Afrique. Bulletin de la Société d’Étude des Sciences naturelles de Vaucluse 11 (3–4) (1940): 31–39.

Guignot F. 1956. Contribution à la connaissance de la faune dystiscidienne Malgache. Le Naturaliste malgache 8: 75–80.

Guignot F. 1959. Revision des Hydrocanthares d’Afrique (Coleoptera: Dytiscoidea). Première Partie. Annales de Musée royal du Congo Belge, Tervuren: Sciences zoologiques 70: 1–313.

Kolbe H.J. 1883. Über die madagascarischen Dytisciden des Königl. entomologischen Museums zu Berlin. Archiv für Naturgeschichte 49 (1): 383–427.

Miller K.B. & Bergsten J. 2016. Diving Beetles of the World. Systematics and Biology of the Dytiscidae. Johns Hopkins University Press, Baltimore.

Nilsson A.N. 2001. Dytiscidae (Coleoptera). World Catalogue of Insects 3: 1–395.

Nilsson A.N. & Hajek J. 2020. A World Catalogue of the Family Dytiscidae, or the Diving Beetles (Coleoptera, Adephaga) Version 1.I.2020. Electronic and updated version of Nilsson A.N. (2001). Dytiscidae. In: World Catalogue of Insects: 1–395. Available from www.waterbeetles.eu [accessed 5 Sep. 2020].

Pederzani F. & Rocchi S. 2009. On some Madagascan Hydradephaga of The Natural History Museum, London, with the descriptions of five new species of Dytiscidae (Coleoptera Haliplidae, Dytiscidae, Noteridae). Atti dell’Accademia Roveretana degli Agiati, Contributi della Classe di Scienze Matematiche, Fisiche e Naturali (8) 8B (258) (2008): 81–100.

Ranarilalatiana T. 2020. Diversité de Copelatus Erichson, 1832 (Coleoptera, Dytiscidae) de Madagascar et des Coléoptères Adephaga aquatiques dans les vestiges forestiers du Haut Plateau Central particulièrement sur les aires protégées de Manjakatompo Ankaratra, d’Ambohitantely et d’Anjozorobe-Angavo. Ph.D. thesis, Université d’Antananarivo, Madagascar.

Régimbart M. 1895. Révision des Dytiscidae et Gyrinidae d’Afrique, Madagascar et îles voisines. Mémoires de la Société entomologique de Belgique 4: 1–244.

Rocchi S. 1991. Contributo alla conoscenza degli Haliplidae e dei Dytiscidae del Madagascar con descrizione di due nuove specie (Coleoptera). Frustula Entomologica (Nuova Serie) 14: 71–89.

Vieilledent G., Grinand C., Rakotomalala F., Ranaivosoa R., Rakotoarijaona J.-R., Allnutt T.F. & Achard F. 2018. Combining global tree cover loss data with historical national forest cover maps to look at six decades of deforestation and forest fragmentation in Madagascar. Biological Conservation 222: 187–197. https://doi.org/10.1016/j.biocon.2018.04.008

Zimmermann A. 1920. Pars 71. Dytiscidae, Haliplidae, Hygrobiidae, Amphizoidae. In: Schenkling S. (ed.) Coleopterorum Catalogus, Volumen IV. Junk, Berlin.

Published
2020-10-05
How to Cite
Bergsten, J., Ranarilalatiana, T., & Biström, O. (2020). A new species of Bidessus from Anjozorobe-Angavo and a review of Malagasy Bidessus (Coleoptera, Dytiscidae). European Journal of Taxonomy, 720(1), 1–18. https://doi.org/10.5852/ejt.2020.720.1109
Section
Research article