Abstract
A review of morphological characters for the western Nearctic genus Kincaidiana indicated that the two described species should be assigned to separate genera. Kincaidiana freidris Cook was transferred to a new genus, Altmanella. New material resembling A. freidris was obtained from many sites throughout western North America. Morphology of the male reproductive structures varied among populations, and the most distinctive morphological differences were accounted for by splitting the taxon into two species, which roughly corresponded to large scale regional patterns. Typical A. freidris occurred in several Pacific Coast drainages. Altmanella idahoensis n. sp., mostly associated with the Snake River drainage, was distinguished from A. freidris by shorter and less muscular atria and penial structures. A second new lumbriculid species with the same basic arrangement of reproductive organs was collected in southeastern North America, and was provisionally assigned to Altmanella. However, in contrast to the petiolate atria and large penial structures of A. freidris and A. idahoensis, Altmanella lenati n. sp. has tubular atria and simple male porophores.References
Altman L.C. (1936) Oligochaeta of Washington. University of Washington Publications in Biology, 4, 1–137.
Brinkhurst R.O. (1989) A phylogenetic analysis of the Lumbriculidae (Annelida, Oligochaeta). Canadian Journal of Zoology, 67, 2731–2739.
Brinkhurst, R.O. (1991) Ancestors. Mitteilungen aus dem Hamburgischen Zoologischen Museum und Institut, 88, 97–110.
Brinkhurst, R.O. (1998) On the genus Eclipidrilus Eisen, 1881 (Lumbriculidae, Clitellata), including a description of Eclipidrilus ithys sp. nov. Canadian Journal of Zoology, 76, 644–659.
Cook, D.G. (1966) Lumbriculidae and additional notes and records of other families. In: Brinkhurst, R.O. & Cook, D.G. (Eds.), Studies on North American aquatic Oligochaeta. III. Proceedings of the Academy of Natural Sciences of Philadelphia, 118, 1–33.
Cook, D.G. (1967) Studies on the Lumbriculidae (Oligochaeta) in Britain. Journal of Zoology (London), 153, 353–368.
Cook, D.G. (1971) Family Lumbriculidae. In: Brinkhurst R.O. & Jamieson B.G.M. (Eds.), Aquatic Oligochaeta of the World. Oliver and Boyd, Edinburgh, pp. 200–285.
Erman, D.C. & Erman, N.A. (1971) Macroinvertebrate composition and production in some Sierra Nevada minerotrophic peatlands. Ecology, 56, 591–603.
Fend, S.V. (2005) A review of the genus Eclipidrilus (Annelida: Clitellata: Lumbriculidae), with description of a new species from western North America. Zootaxa, 969, 1–42.
Fend, S.V. & Brinkhurst, R.O. (2000) New species of Rhynchelmis (Clitellata, Lumbriculidae), with observations on the Nearctic species. Hydrobiologia, 428, 1–59.
Fend, S.V. & Lenat, D.R. (2007) Two new genera of Lumbriculidae (Annelida, Clitellata) from North Carolina, USA. Zootaxa, 1666, 1–22
Fend, S.V. & Ohtaka, A. (2004) Yamaguchia toyensis n. sp., n. gen. (Annelida, Clitellata, Lumbriculidae) from profundal lake habitat in Japan. Zoological Science, 21, 677–683.
Hrabĕ, S. (1931) Die Oligochaeten aus den Seen Ochrida und Prespa. Zoologische Jahrbücher, Abteilung für Systematik, Ökologie und Geographie der Tiere, 61, 1–62.
Kathman, R.D. & Brinkhurst, R.O. (1998) Guide to the freshwater oligochaetes of North America. Aquatic Resources Center, College Grove, TN, USA., iv + 264 pp.
Merritt, R.W. & Cummins, K.W. (1996) Aquatic Insects of North America, Third Edition. Kendall/Hunt Publishing Company, Dubuque, Iowa.
Michaelsen, W. (1933) Über Höhlen Oligochäten. Mitteilungen Höhlen-Universität Karstforsch, Berlin, 1, 1–19.
Pennak, R.W. (1989) Fresh-water invertebrates of the United States, 3rd Edition. Protozoa to Mollusca. John Wiley & Sons, Inc., 628 pp.
Rodriguez, P. & Giani, N. (1994) A preliminary review of the taxonomic characters used for the systematics of the genus Trichodrilus Claparède (Oligochaeta, Lumbriculidae). Hydrobiologia, 278, 35–51.
Taylor, D.W. (1985) Evolution of freshwater drainages and molluscs in western North America. In: Smiley, C.J. & Leviton, A.J. (Eds.), Late Cenozoic History of the Pacific Northwest, Interdisciplinary Studies of the Clarkia Fossil Beds of Northern Idaho. San Francisco: American Association for the Advancement of Science, pp. 265–321.
Timm, T. (1998) Lumbriculidae (Oligochaeta) of Lake Taimyr. Journal of Natural History, 32, 1291–1301.