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Eulimnadia texana Packard 1871 (Conchostraca : Crustacea) from northern California: Anthropogenic introduction?
... The large branchiopod fauna from Idaho was previously reviewed by Rogers et al. (2006), Oregon by Coopey (1946) and Rogers (2002) and from Washington by Lynch (1937Lynch ( , 1958Lynch ( , 1960Lynch ( , 1972a. As regards adjacent areas, Montana was also recently reviewed (Hossak et al. 2010), and California has been fairly well studied (Eng et al. 1990, Hill and Shepard 1997, Eriksen and Belk, 1999, Rogers 2000, Rogers and Fugate 2001, Rogers and Belk 2002. The US state of Nevada and the Canadian province of British Columbia have not been reviewed, and both regions need focused surveys. ...
We present a checklist of the large branchiopod crustaceans of Idaho, Oregon and Washington, USA. New distributional records are presented for most species, including the first records of Branchinecta constricta Rogers, 2006 and Lepidurus cryptus Rogers, 2001 from Idaho, the first record of B. oriena Belk & Rogers 2002 from Oregon, the first record of B. mackini Dexter, 1956 and Artemia franciscana Kellogg, 1906 co-occurring, and the first record of L. cryptus from Washington. Furthermore, we present the first record of Eulimnadia diversa Mattox, 1937 from west of the continental divide, which we interpret as an accidental introduction. In 1959, Lynch collected a new fairy shrimp species from Washington, deposited that material in the US National Museum, labeled "muddy fairy shrimp, Branchinecta lutulenta", but never described it. Numerous efforts have been made to rediscover extant populations since 1999. We rediscovered this species in 2011, from two small pools from the vicinity of Lynch's original collection site, which appears to have been destroyed. Branchinecta lutulenta sp. nov. is most closely related to B. lindahli Packard, 1883 and B. oterosanvicentei Obregon-Barboza et al., 2002. Branchinecta lutulenta sp. nov. is readily separable from all other Branchinecta species by the form of the male second antennal distal antennomere and the ornamentation of the female dorsum.
... In fact only western and southern North America have been extensively surveyed (e.g., Dodds, 1915;Mackin, 1938;Prophet, 1963;Belk, 1975Belk, , 1992Eng et al., 1990;Maeda-Martı´-nez, 1991;Hill et al., 1997;Maeda-Martı´nez et al., 1997a,b;Eriksen & Belk, 1999;Rogers, 2001;Rogers et al., unpublished). Even in these areas, new species and new records are being found with regularity (e.g., Belk & Fugate, 2000;Rogers 2000Rogers , 2001Rogers & Fugate 2001;Belk & Rogers, 2002;Obrego´n-Barboza et al., 2002;Maeda-Martı´nez et al., unpublished;Rogers & Quinney, unpublished). ...
A previously unknown species of anostracan is presented and described herein as Eubranchipus stegosusn. sp. This species is unique in that the male bears large, sub-quadrate, transverse, dorsal thoracic projections. Eubranchipus stegosus n. sp. is most closely related to E. moorei and E. holmani and may be endemic to southwestern Georgia. However, anostracans are poorly sampled throughout the southeastern United States, and additional surveys should be conducted to better understand this species'' distribution and degree of rarity.
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