查看更多>>摘要：The genus Trilacuna (Araneae, Oonopidae), comprising only two species from China, is supplemented by seven new species collected in Thailand, Malaysia and Sumatra (T. merapi, T. bilingua, T. clarissa, T. werni, T. alces, T. kropfi, and T. diabolica).The new species exhibit an incised labium and a complicated set of membranes and/or filiform projections around the embolus, both diagnostic for the genus Trilacuna.
查看更多>>摘要：A survey of mysid crustaceans in near-shore habitats of the Cayman Islands and the Turks and Caicos Islands, BWI yielded two new species of mysids belonging to the genus Heteromysis S. I. Smith, 1873. H. (Olivemysis) modlini n. sp. occurred on live bottom habitats in shallow waters of Grand Cayman Island, and H. (Olivemysis) mclellandi n. sp. from sponges in depths of 21-27 m on deep fringing reefs off Pine Cay, Turks and Caicos Islands. H. modlini may be distinguished from closely related species inthe western Atlantic by the following characters: (1) 6-7 robust flagellated setae on the medial margin of the carpo-propodus of thoracic endopod 3, (2) 3-5 and 4-6 bent, attenuated spines on male pleo-pods 3 and 4, respectively, (3) 3-4 spiniform setaealong the medial margin of the uropodal endopod, and (4) 10-16 spinules along the anterior 3/4 of the telsonic cleft, 14-19 spiniform setae completely lining the lateral margins of the tel-son, and each apical lobe of the telson with a pair of spiniformsetae, the outer 1.6-2.0 times longer than the inner. Heteromysis (Olivemysis) mclellandi is unique among known heteromysids in having modified attenuated setae on pleopods 1-5 of both males and females, and may be distinguished further from its relatedCaribbean congeners by the following characters: (1) tuberculate flagellated seta on the antennular peduncle, (2) 8-9 flagellated setae on the carpo-propodus of thoracic endopod 3, and (3) telson cleft depth: telson length ratio of about 1/6, and outer:inner length ratio of apical telson setae of 1.2-1.6. Diagnostic tables separating the two new species from related Caribbean congeners are presented. The subgenus Olivemysis Bacescu, 1968 is diagnosed and discussed; based on a critical review of the literature, 10 species, besides H. (Olivemysis) modlini n. sp. and H. (Olivemysis) mclellandi n. sp., are placed in this subgenus, bringing its total species number to 30.
查看更多>>摘要：Five halacarid species are reported from the Brazilian coast for the first time. Scaptognathides delicatulus, formerly known only from its type locality in Kuwait; Scaptognathus gibbosus, known from Galapagos and Somalia; and Scaptog-nathus insularisknown from northeastern Australia, have their distributions extended. Along with these new records, Halacaroides antoniazziae sp. nov. and Acarochelopodia caissara sp. nov. are described. Halacaroides antoniazziae sp. nov. differs from its congeners by the presence of three subgenital setae in males and none in females, 41-44 perigenital setae and two posterior external genital acetabula in males. Acarochelopodia caissara sp. nov. has a rounded anterior epi-meral plate margin, the posterior epimeral plates are partially divided into two halves but anteriorly joined by a narrow band, the dorsal setae on tarsus I are grouped 1:2, and the anterior and posterior dorsal plates have a length: width ratio of 1.61-1.77 and 1.60-1.70, respectively.
查看更多>>摘要：Clarias gracilentus, a new Southeast Asian walking catfish species, is described from Phu Quoc Island (Vietnam) off the coast of southeastern Cambodia and from mainland southeastern Cambodia. The new species is a member of the C. nieuhofii species complex, and can be distinguished from congeners in the complex in having a combination of: head width 11.9-12.9% SL, distance between the occipital process and the base of the first dorsal-fin ray 5.3-8.4% SL, pectoral-fin length 8.5-10.1% SL, body depth at anus 8.2-11.7% SL, pelvic-fin length 4.3-5.5% SL, length of anal-fin base 60.0-63.9% SL, eye diameter 5.4-7.2% HL, interorbital distance 42.7-48.0% HL, occipital-process length 7.8-14.7% HL, 96-101 dorsal-fin rays, 84-89 anal-fin rays and 80-84 total vertebrae.
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