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Lin Ma and Xinzheng Li

Abstract

A new species, Typhlamphiascus tuerkayi sp. nov. (Copepoda, Harpacticoida, Miraciiidae), is described from specimens collected in the South China Sea. This new species differs from its congeners by the combined characters of the number of chitinous lamellae on the male P1, the apomorphic setal formulae of the swimming legs, and the setal number on P5. The new species is most similar to T. ovale Wells & Rao, 1987 and T. higginsi Chullasorn, 2009. It differs from the latter two species by the following features: the caudal ramus about three times as long as broad, P2 exp-3 with three outer spines, P3 enp-3 with two inner setae, P5 basoendopod in the female with four setae, P5 exopod in the female about three times as long as its greatest width, antennule of male 9-segmented, the inner edge of the basis in male P1 with eight chitinous lamellae, P5 exopod in male with four setae.

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Lin Ma and Xinzheng Li

A new species, Typhlamphiascus tuerkayi sp. nov. (Copepoda, Harpacticoida, Miraciiidae), is described from specimens collected in the South China Sea. This new species differs from its congeners by the combined characters of the number of chitinous lamellae on the male P1, the apomorphic setal formulae of the swimming legs, and the setal number on P5. The new species is most similar to T. ovale Wells & Rao, 1987 and T. higginsi Chullasorn, 2009. It differs from the latter two species by the following features: the caudal ramus about three times as long as broad, P2 exp-3 with three outer spines, P3 enp-3 with two inner setae, P5 basoendopod in the female with four setae, P5 exopod in the female about three times as long as its greatest width, antennule of male 9-segmented, the inner edge of the basis in male P1 with eight chitinous lamellae, P5 exopod in male with four setae.

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Dong Dong and Xinzheng Li

Squat lobsters are prevalent in chemosynthetic environments but have been insufficiently studied in mud volcano habitats. An abyssal species, Munidopsis taiwanica Osawa, Lin & Chan, 2008 was recently collected in a mud volcano field in the Mariana Trench at a depth greater than 5000 m, which represents a new distributional record. Its diagnostic characters are presented in this study. In-situ observation suggested that M. taiwanica was closely associated with this chemosynthetic environment and probably exhibited camouflage behaviour by attaching seafloor sediments onto its body. Munidopsis taiwanica is the first confirmed species of squat lobster found in the mud volcano environment, and currently represents the deepest record (5491 m) of squat lobsters in the world.

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Yaqin Wang, Zhibin Gan and Xinzheng Li

Based on samples collected from the Yellow Sea in October 2014, a new species of pasiphaeid shrimp, Leptochela (Leptochela) tuerkayi sp. nov., is described. The new species is closely related to L. (L.) gracilis Stimpson, 1860 in morphology but differs from the latter and other congeners by the following combination of characters: three longitudinal dorsal carinae in ovigerous females, third maxilliped with the rather short exopod slightly overreaching the distal margin of the antepenultimate segment and the fourth pereiopod with the exopod reaching beyond the end of the merus. Morphological data and a partial sequence of the 16S rRNA gene of the new species are provided to show its systematic position.

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Qingxi Han, Qingxi Han and Xinzheng Li

The brown shrimp, Crangon hakodatei Rathbun, 1902, is a common species in northwestern Pacific waters. Based on an investigation of references since the 1950s, we studied the ecological features of this commercially important shrimp. The results show, that the species has a long reproductive period with ovigerous females throughout the year and two discrete peaks in the spawning season, i.e., in spring and in autumn. Its sex ratio also shows significant seasonal variation. This shrimp is a keystone species in the demersal trophic pathways in the northern Chinese seas. It occupies an intermediate position in the food web, acting both as an important food resource for flatfishes on a higher trophic level, and as a predator upon the early life stages of those flatfishes.