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1.
A new species of free-living marine nematode of the genus Daptonema Cobb, 1920 is described from the sublittoral sediment of the Jiaozhou Bay, Qingdao. Daptonema parabreviseta sp. nov. is characterized by having narrowed anterior end; small funnel-shaped buccal cavity; short cephalic setae; spicules with bulbiform proximal end and pointed distal end; gubercunalum tubular shape with a blunt dorsal apophysis. The female genital system presents a spacious postvulval sac. The new species closely resembles Daptonema brevisetosum Thanh & Gagarin, 2009. However, it differs from Daptonema brevisetosum by having relatively narrowed head (10 μm vs 20 μm); spicules with bulbiform proximal end and pointed distal end, not bifurcated at distal end. Female genital system with a spacious postvulval sac (vs absent).
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Journal of Oceanology and Limnology - 2-Methylisoborneol (2-MIB) is a cyanobacterial metabolite that is responsible for many taste and odor (T&O) complaints related to the aesthetics of... 相似文献
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Fernando GóMEZ 《中国海洋湖沼学报》2008,26(1):116-120
This study is the first to describe and illustrate the dinoflagellate genus Dicroerisma in the open Pacific Sea and in the southern hemisphere. Eleven individuals ascribed to Dicroerisma psilonereiella were encountered in subsurface waters （〉70 m depth） from 34°N to 33°S. Another specimen that differs from the type is also illustrated. These findings reveal that Dicroerisma is a widespread genus and that there is tentative existence of another species within the genus. 相似文献
5.
Fernando GMEZ 《中国海洋湖沼学报》2008,(1)
This study is the first to describe and illustrate the dinoflagellate genus Dicroerisma in the open Pacific Sea and in the southern hemisphere.Eleven individuals ascribed to Dicroerisma psilonereiella were encountered in subsurface waters(>70 m depth) from 34°N to 33°S.Another specimen that differs from the type is also illustrated.These findings reveal that Dicroerisma is a widespread genus and that there is tentative existence of another species within the genus. 相似文献
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《中国海洋湖沼学报》2016,(1)
A new genus of the deep-sea pontoniine shrimps,Bathymenes gen. nov.,is established for the 'Periclimenes alcocki species group' of the genus Periclimenes Costa,1844. The new genus is distinguished from other genera of the Pontoniinae by a combination of characters: the posteriormost dorsal rostral tooth remote from other teeth,situated in the epigastric position,cornea usually reduced,the propodus of second pereiopods covered with fine granules,the dactylus of the major second chela being generally flanged,the ambulatory pereiopods with the dactyli being biunguiculate and telson with more than two pairs of dorsolateral spines. The genus is mainly distributed in the tropical to warm-temperate Indo-West Pacific waters at depths greater than 200 m. Fifteen species previously recognized as belonging to the 'P.a lcocki species group' are now placed in Bathymenes gen. nov. A key for their identification and a checklist of congeneric species are provided. 相似文献
8.
Luidia Forbes (Paxillosida: Luidiidae) are common soft bottom sea stars with 49 described species. Because of substantial morphological diversity, the taxonomy of the genus is complex and hasn’t been resolved definitely. In order to resolve general taxonomic issues, and determine species boundaries and phylogenetic relationships within the genus Luidia, the sequences of cytochrome oxidase subunit I (COI) gene from 24 specimens of Luidia, belonging to eight taxa in Chinese waters, were studied. Three sequences of two species in genus Luidia from GenBank were used to analyze the phylogenetic relationships. The molecular phylogeny exhibited three main clades, each with strong bootstrap support: Clade A including Luidia quinaria from the Sea of Japan; Clade B including seven nominal species (L. quinaria von Martens, L. yesoensis Goto, L. changi Liu, Liao and Li, L. orientalis Fisher, L. avicularia Fisher, L. longispina Sladen and L. hardwicki Gray) from Chinese waters; and Clade C including L. maculata Müller & Troschel from Chinese waters. Our molecular phylogeny results support the morphological Quinaria-Group and Alternata-Group assigned by Döderlein. Seven nominal species we sampled do not exhibit genetic distances that are large enough to recognize them as separate species. Cryptic species may exist in’ Luidia quinaria’ from the Yellow Sea and the Sea of Japan. Meaningful morphological characters need further investigation in Luidia. 相似文献
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《中国海洋湖沼学报》2021,(5)
A new genus and species of axiid shrimp,Carolinaxius kexuae gen.et sp.nov.is described and illustrated based on a single specimen collected from an unnamed seamount in the Caroline Ridge,Northwest Pacific.Although both chelipeds are mis sing,the specimen can be distinguished from other axiid genera by a combination of characteristics:narrowly triangular ro strum;median carina and lateral gastric carina each with one prominent tooth;submedian gastric carinae converging po steriorly,with teeth;cornea weakly pigmented,eyestalk with acute distome sial tooth on dorsal surface;male pleopod 1 two-articled;pleopod 2 with appendix interna and appendix masculina;pleopods 3-5 with appendix interna.The molecular phylogeny suggests the new genus is most closely related to another recently described genus living inside hexactinellid sponges on seamounts in the Indian Ocean,Montanaxius Dworschak,2016.However,it differs from Montanaxius in the shape of the rostrum,the arrangement of teeth on the carapace,and the shape of the eyestalk.Besides,the significant molecular differences support the two belonging to different genera. 相似文献
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Grateloupia ramosa Wang & Luan sp. nov. (Halymeniaceae, Rhodophyta) is newly described from Hainan Province, southern China. The organism has the following morphological features: (1) purplish red, cartilaginous and lubricous thalli 5–10 cm in height; (2) compressed percurrent axes bearing abundant branches with opposite arrangement; (3) claw-like apices on top, constricted to 2–4 cm at the base; (4) cortex consisting of 3–6 layers of elliptical or anomalous cells and a medulla covered by compact medullary filaments; (5) reproductive structures distributed throughout the thallus, especially centralized at the bottom of the end portion of the branches; and (6) 4-celled Carpogonial branches and 3-celled auxiliary-cell branches, both of the Grateloupia-type. The morphological diff erences were supported by molecular phylogenetics based on ribulose-1, 5-bisphosphate carboxylase/oxygenase (rbcL) gene sequence analysis. There was only a 1 bp divergence between specimens collected from Wenchang and Lingshui of Hainan province. The new species was embedded in the large Grateloupia clade of the Halymeniaceae. The pairwise distances between G. ramosa and other species within Grateloupia ranged from 26 to 105 bp, within pairwise distances of 13–111 bp between species of the large genus Grateloupia in Halymeniaceae. Thus, we propose this new species as G. ramosa Wang & Luan sp. nov. 相似文献
11.
A new member of Sphenopsida,Neolobatannularia gen. nov. from Late Triassic of western Liaoning,China
WANG Junyou LI Tao LIU Zhiping GUO Bin KANG Ai NA Yuling LI Yunfeng WANG Hongshan BO Junchen SUN Chunlin 《世界地质(英文版)》2019,22(1)
A new genus Neolobatannularia Sun et Li gen. nov. with the type species Neolobatannularia liaoningensis Sun et Li sp. nov. from the Upper Triassic Yangcaogou Formation of Beipiao, Liaoning, China, is described in this paper. The new taxon is attributed to Equisetales of Sphenopsida based on its branch with internodes, node and leaves borne in whorls on nodes. It is a new member of the Mesozoic Sphenopsida. Although the new taxon shares some morphological characters with the genus Lobatannularia Kawasaki, a genus widely distributed in the Permian Cathaysia flora in East Asia, and the genus Lobatannulariopsis Yang from the Late Triassic of southwestern China, its unique branching pattern is markedly distinguished from the two known genera. Some Triassic known species of Lobatannularia may belong to the present new genus Neolobatannularia. 相似文献
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Han Jinfen Nan Fangru Feng Jia Lü Junping Liu Qi Liu Xudong Xie Shulian 《中国海洋湖沼学报》2022,40(2):729-744
Journal of Oceanology and Limnology - The genus Sheathia consists of over 20 species primarily distributed in Asia, Europe, Oceania, North America, and Africa. However, the origin and evolution of... 相似文献
13.
Wang Shida 《中国海洋湖沼学报》1990,8(3):273-279
Male and female adult midges ofPseudosmittia aizaiensis sp.n. are described and illustrated with figures of morphological characters. The inferior volsella of gonocoxite with large
lobes, the long but equal width gonostylus, and the small projection in basal part of outer margin are the characters that
may separate this species from others. One larva of this genus is purely aquatic in habitat and is associated with Cricotopus
bicinctus,Cardiocladius capucinus andPolypedilum sp. in the same algae debris (Spirogyra sp.) of the Dunghe River. Further, the larva's very short SI and SII bifids, its
5 pairs of lateral teeth on mentum and its absence of premandible brush are the characters that may also separate this species
from any known species of this genus. 相似文献
14.
Journal of Oceanology and Limnology - The live-bearing genus Sebastes is renowned for its outstanding species richness and color diversity, and its speciation has been a point of interest. This... 相似文献
15.
Species in the cyanobacterial genus Merismopedia are present in freshwaters at different trophic levels, with some species even as the components of cyanobacterial blooms. However, species diversity in this genus was not fully verified by molecular investigation and polyphasic taxonomic studies. In this study, Merismopedia-like strain tenuissima CHAB 7021 was isolated from Ganjiang River in Jiangxi Province, China, and polyphasic characterization of this strain was performed by morphological observation, ultrastructural examination, chemical detection of pigments and phylogenetic analysis based on 16 S rRNA gene sequences. Morphological identification of the strain was supported by the ultrastructural features, as the tiny species Merismopedia tenuissima Lemmermann. The phylogeny based on 16 S rRNA gene sequences revealed at least three clades formed by the strains of Merismopedia. The three M. tenuissima strains including M. tenuissima CHAB 7021 was gathered in clade III with distant relationship to the clade I formed by the six Merismopedia strains including the type species M. punctata, and such a genetic distance may propose Merismopedia tenuissima to separate from Merismopedia genus. However intermixture relationship in between strains of M. punctate and M. glauca in the phylogenetic tree still complicated the taxonomic status in the genus Merismopedia. The process for taxonomic revision in the Merismopedia genus still await for examination and further information on more strains of type species M. punctata. 相似文献
16.
Zhang Zhinan 《中国海洋湖沼学报》1992,10(1):31-39
Two nematode species of the genusDorylaimopsis (Family Comesometidae) from the Bohai Sea are described.Dorylaimopsis rabalaisi n. sp. similar toD. punctata Ditlevsen, 1918 from which it can be separated by the small size, short and simple spicules without ventral apophyses or
joint line.Dorylaimopsis turneri n. sp. differs from the closest speciesDorylaimopsis angelae (Inglis, 1967) by its higher values of de Man ratio ‘a’, much shorter spicules and higher ratio of gubernacular to spicules
length. A key to species of the genus based on the key by Jensen (1979) is given.
This project was supported by the National Science Foundation, No: 3860804 相似文献
17.
Liao Yulin 《中国海洋湖沼学报》1984,2(1):109-117
Five species of Asterometrids (Crinoidea) collected from China are recorded. One of them is described as a new genus and new species named Sinometra acuticirra, and three are recorded from China for the first time. 相似文献
18.
A new species belonging to the genus Haloschizopera Lang,1944(Copepoda,Harpacticoida,Miraciidae,Diosaccinae)was identified based on the samples collected from the East China Sea,near the offshore of Zhejiang Province,East China.The new species is closely related to H.pygmaea Norman Sccot T.,1905 and shares a combination of the following features:A1 eight-segmented;A2 exp-2 with one distal seta,exp-3 with three setae;P1 endopodal segments subequal,enp-1 not exceeding exp-2;exp-3 of P3 with one inner seta,of P4 with two inner setae.The new species is characterized by the presence of one inner seta on P2 exp-3 of both sexes.It can also be distinguished from its congeners by the characters of female:P5 exopod subcircular,endopodal lobe extending beyond half-length of exopod;genital doublesomite ornamented with three dorsolateral rows of spinules on anterior part. 相似文献
19.
A new species of free-living marine nematode of the genus Paramonohystera was described from the intertidal beach,Weihai.Paramonohystera weihaiensis sp.nov.is characterized by cervical region with a circle of long setae;tail sexual dimorphism,male tail angled dorsally with sharp narrowed of the body at the cloaca,female tail ordinary conico-cylindrical; spicules slender,2.5 abd long; gubemaculum plate,enlarged distal end with two teeth,without apophysis; precloacal supplements absent;Four caudal gland cells obviously extended to tail.The new species differs from the other fourteen known valid congeners by the combination of its characteristics:a circle of long cervical setae,tail sexual dimorphism,spicules slender,2.5 abd long,gubernaculum plate with a distal pair of teeth. 相似文献
20.
The living morphology, nuclear apparatus, infraciliature and silverline system of the poorly-known ciliatePseudocohnilembus hargisi Evans & Thompson, 1964, collected from a shrimp culture pond in Qingdao, China, were examined by observation of the live
specimen; and by the pyridinated carbonate method and Chatton-Lwoff technique. The main characteristics: 13–14 (usually 13)
longitudinal or slightly spirally arranged somatic kineties; single contractile vacuole with usually 2 (1–2) pores at posterior
ends of the fourth and fifth somatic kineties to the right of the buccal cavity. Several related congeners were compared and
morphometrically tabulated.
Project No. 39970098 supported by NSFC. 相似文献