JUSTIN SHAFERJOHN R. HOLSINGERLYNNETTE MEADOR ANSELL
21页
查看更多>>摘要：Four new species of the subterranean amphipod genus Stygobromus are described from groundwater habitats in Maryland and Virginia. All four of the species occur in Maryland, and one of them also occurs in Virginia.Three of these species are found in groundwater seeps or seepage springs in the Piedmont of northeastern Maryland, whereas the fourth occurs in similar habitats on the Coastal Plain of southern Maryland west of the Chesapeake Bay and on the opposite side of the Potomac River in seeps on theCoastal Plain in southeastern Virginia. Descriptions of the new species bring the total number of described species in the genus to 139, all but five of which are recorded from North America. Recognition of the four new species suggests that species diversity in Stygobromus is greater in shallow groundwater habitats east of the Appalachian cave and karst region than originally believed.
查看更多>>摘要：This paper reports on four species of mites of the family Laelapidae associated with ants in Iran-Gymnolaelaps messor sp. nov. from Messor sp., Gymnolaelapsprestoni sp. nov. from Myrmica sp., Myrmozercon karajensis sp. nov. from Cam-ponotus sp., and Pseudoparasitus missouriensis (Ewing, 1909) from Camponotus sp. This is the first record of Myrmozercon from Iran. The genera Gymnolaelaps and Pseudoparasitus are distinguished from each other and from the related genus Laelaspis by the shape, ornamentation and chaetotaxy of the genital shield, the form of the palp tarsal claw, and the presence or absence of pre-sternal plates.
查看更多>>摘要：Procambarus (Ortmannicus) luxus is described from Bee, Brooks, Jim Wells, Kleberg, Nueces, Refugio and San Patricio counties, Texas. It may be distinguished from its nearest relative, P. (O.) texanus, by its strongly asymmetrical first pleopods with proximal extremities separated by a distinct gap; strongly corneous, narrow, scarcely laterally deflected mesial process; slightly more recurved cephalic process and central projection; and an annulus ventralis which is more weakly overhung by the adjacent sternum and bears a prominent caudomedian tonguelike projection.
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