来自北美的近亲阿洛纳溞类枝角类动物（枝角目：端足亚目：盘肠溞科）

Cladocerans of Alona affinis group (Cladocera: Anomopoda: Chydoridae) from North America.

作者信息

Sinev Artem Y

机构信息

Department of Invertebrate Zoology, Biological Faculty, M. V. Lomonosov Moscow State University, Leninskie Gory, Moscow 119991, Russia.

出版信息

Zootaxa. 2013;3693:329-43. doi: 10.11646/zootaxa.3693.3.3.

DOI:10.11646/zootaxa.3693.3.3

PMID:26185851

Abstract

Cladocera of Alona affinis group from North America preserved in the collection of Professor D. G. Frey were investigated. A new subspecies of Alona ossiani Sinev, 1998 is described. Alona ossiani herricki ssp. nov. differs from the nominative subspecies in presence of 2-3 marginal denticles on postanal angle of male postabdomen, no differences between subspecies were revealed in the female morphology. An obscure taxon Alona lepida Birge,1892 was shown to be a valid species of affinis-group and is redescribed. A. lepida shares characteristic features of the group, but differs from all other species in the body shape, by postabdominal claw with basal spine almost parallel to the claw itself, and by IDL seta 1 being not claw-like. Morphology, relationships and distribution of studied taxa are discussed.

摘要

对保存在D. G. 弗雷教授收藏中的来自北美的近亲菱属枝角类动物进行了研究。描述了1998年西涅夫命名的奥氏菱的一个新亚种。新亚种赫氏奥氏菱与指名亚种的区别在于雄性后腹部肛门后角有2 - 3个边缘小齿，而在雌性形态上未发现亚种间的差异。一个模糊的分类单元——1892年比尔格命名的鳞菱被证明是近亲组的一个有效物种，并对其进行了重新描述。鳞菱具有该组的特征，但在体型、后腹部爪基部的刺几乎与爪本身平行以及内触角刚毛1不是爪状等方面与所有其他物种不同。讨论了所研究分类单元的形态、亲缘关系和分布。