Abstract
The larval morphology of Amphiops mater mater Sharp, 1873 is described, including chaetotaxy and morphological trans-formation between instars. Among genera of the family Hydrophilidae, the larvae of Amphiops Erichson, 1843 may bedistinguished by the following combination of characters: coronal line present; clypeolabrum almost symmetrical; man-dibles symmetrical and with three inner teeth; dorsal surface of palpomere 1 completely sclerotized; mentum with stronglyprojecting and sharply pointed anterior corners; ligula absent; spiracular atrium well developed. Several primary sensillaare absent from all instars of A. mater mater, in contrast to the stable chaetotaxy in the majority of Hydrophilidae species studied in detail to date.References
Archangelsky, M. (1997) Studies on the biology, ecology, and systematics of the immature stages of New World Hydrophiloidea (Coleoptera: Staphyliniformia). Bulletin of the Ohio Biological Survey, New Series, 12, 1–207.
Archangelsky, M. (2002a) Immature stages of Neotropical Enochrus (Coleoptera: Hydrophilidae): E. (Methydrus) lampros Knisch, 1924 and E. (Hugoscottia) tremolerasi Knisch, 1922. Aquatic Insects, 24 (1), 41–52.
Archangelsky, M. (2002b) Nuevas larvas de Hydrophilidae (Coleoptera: Hydrophiloidea): Hemiosus multimaculatus y Chaetarthria bruchi. Revista de la Sociedad Entomologica Argentina, 61, 89–97.
Balfour-Browne, J. (1939) Contribution to the study of the Palpicornia part III. Annals and Magazine of Natural History, Including Zoology, Botany and Geology. Eleventh Series, 4, 289–310.
Berge Henegouwen, A.L., van. (1982) Notes on the larval stages of some East African Hydrophilinae (Coleoptera: Hydrophilidae). Entomologische Berichten, 42, 11–16.
Bertrand, H. (1935) Voyage de Ch. Alluaud et de P. A. Chappuis dans l'Afrique occidentale francaise. Larves se Coléopteres aquatiques. Revue française d'entomologie, 2 (3), 132–140.
Bertrand, H. (1936) Larves de Coléopteres aquatiques de l'Expédition Limnologique Allemande en Insulinde. Archiv für Hydrobiologie, Supplement Band XIV "Tropische Binnengewässer, Band VI", 6, 193–285, pls. I–XI.
Bertrand, H. (1972) Larves et Nymphes des Coléoptères Aquatiques du Globe. Imprimerie F. Paillart, Abbeville, 804 pp.
Beutel, R.G. (1999) Morphology and evolution of the larval head of Hydrophiloidea and Histeroidea (Coleoptera: Staphyliniformia). Tijdschrift voor Entomologie, 142, 9–30.
Byttebier, B. & Torres, P.L.M. (2009) Description of the preimaginal stages of Enochrus (Hugoscottia) variegatus (Steinheil, 1869) and E. (Methydrus) vulgaris (Steinheil, 1869) (Coleoptera: Hydrophilidae), with emphasis on larval morphometry and chaetotaxy. Zootaxa, 2139, 1–22.
Fikáček, M., Archangelsky, M. & Torres, P.L.M. (2008) Primary chaetotaxy of the larval head capsule and head appendages of the Hydrophilidae (Coleoptera) based on larva of Hydrobius fuscipes (Linnaeus, 1758). Zootaxa, 1874, 16–34.
Hadley, A. (2010) CombineZP. Available online at http://www.hadleyweb.pwp.blueyonder.co.uk/.
Hansen, M. (1991) The hydrophiloid beetles. Phylogeny, classification, and a revision of the genera (Coleoptera: Hydrophiloidea). Biologiske Skrifter, 40, 1–367.
Hansen, M. (1999) World Catalogue of Insects 2: Hydrophiloidea (s. str.) (Coleoptera). Apollo Books, Amsterdam, 416 pp.
Hayashi, M. (2008) Distributional records and ecological notes on aquatic Coleoptera of Shimane prefecture, Part II. Bulletin of Hoshizaki Green Foundation (11), 61–91. (In Japanese with English title and abstract)
Hayashi, M. (2009) Aquatic Hydrophilidae of Shimane prefecture. Bulletin of Hoshizaki Green Foundation (12), 87–121. (In Japanese with English title and abstract)
Hayashi, M. (2011) Aquatic Coleoptera of Shimane Prefecture. Special Bulletin of the Hoshizaki Green Foundation (1), 1–117. (In Japanse with English title)
Hosoi, M. (1952) [Observations of the behavior of egg cases laying in the family Hydrophilidae]. Kagaku Kyôiku News (29), 4–6. (In Japanese)
Marche-Marchad, J. (1974) Observation sur la biologie des Amphiops Er. (Coleopteres Hydrophilidae): decouverte de la nymphe. Bulletin de l'Institut Fondamental d'Afrique Noire. Série A, Sciences Naturelles, 36 (4), 924–930.
Minoshima, Y. & Hayashi, M. (2011a) Larval morphology of the Japanese species of the tribes Acidocerini, Hydrobiusini and Hydrophilini (Coleoptera: Hydrophilidae). Acta Entomologica Musei Nationalis Pragae, 51 (supplementum), 1–118.
Minoshima, Y. & Hayashi, M. (2011b) Larval morphology of the genus Hydrocassis Fairmaire (Coleoptera: Hydrophilidae). Journal of Natural History, 45 (45–46), 2757–2784.
Sharp, D. (1873) The water beetles of Japan. Transactions of the Entomological Society of London, 1873, 45–67.
Shirayama, Y., Kaku, T. & Higgins, R.P. (1993) Double-sided microscopic observation of meiofauna using an HS-slide. Benthos Research (44), 41–44. (In Japanese with English title and abstract)
Short, A.E.Z. & Fikáček, M. (2011) World catalogue of the Hydrophiloidea (Coleoptera): additions and corrections II (2006–2010). Acta Entomologica Musei Nationalis Pragae, 51 (1), 83–122.
Short, A.E.Z. & Hebauer, F. (2006) World catalogue of Hydrophiloidea – additions and corrections, 1 (1999–2005) (Coleoptera). Koleopterologische Rundschau, 76, 315–359.
Spangler, P.J. (1986) A new genus and species of water scavenger beetle, Guyanobius adocetus, from Guyana and its larva (Coleoptera, Hydrophilidae, Hydrobiinae). Proceedings of the Entomological Society of Washington, 88 (3), 585–594.
Stephens, J.F. (1829 (1828–29)) Illustrations of British Entomology; or, A Synopsis of Indigenous Insects: Containing Their Generic and Specific Distinctions. Mandibulata. Vol. II. Baldwin and Cradock, London, 200 pp + pls. 10–15. (Only 113–200 pp. and pls. 13–15 issued in 1829)
Torres, P.L.M., Michat, M.C. & Archangelsky, M. (2011) The immature stages of Tropisternus (Pleurhomus) sahlbergi (Sharp) (Coleoptera: Hydrophilidae), with considerations on the primary chaetotaxy of Tropisternus Solier. Zootaxa, 2777, 25–40.
Watts, C.H.S. (2002) The larvae of some Australian aquatic Hydrophilidae (Coleoptera: Insecta). Records of the South Australian Museum, 35 (2), 105–138.
Yoshimura, A. (1959) [Descriptions of two hydrophilid larvae from Japan (Coleoptera)]. Kansai Shizen Kagaku Kenkyû-kai Kaishi (12), 28–29. (In Japanese)