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In Vietnam Gioáng Gheï Charybdis The genus Charybdis (Crustacea: Portunidae) in Viet Nam Item Type Journal Contribution Authors Nguyen, Van Chung Download date 26/09/2021 22:50:28 Link to Item http://hdl.handle.net/1834/9267 Collection of Marine Research Works, 2002, XII: 167-178 THE GENUS CHARYBDIS (CRUSTACEA: PORTUNIDAE) IN VIETNAM Nguyen Van Chung Institute of Oceanography (Nha Trang) ABSTRACT 14 species of Charybdis were determinated in Vietnamese coastal waters, including two new records, all species were described, identified by key and illustrated on pictures. GIOÁNG GHEÏ CHARYBDIS (CRUSTACEA: PORTUNIDAE) ÔÛ VIEÄT NAM Nguyeãn Vaên Chung Vieän Haûi Döông Hoïc (Nha Trang) TOÙM TAÉT Baøi baùo ñaõ ñöa ra 14 loaøi thuoäc gioáng gheï Charybdis, hoï cua Bôi (Portunidae) ôû Vieät Nam, bao goàm 2 loaøi môùi boå sung cho khu heä cua bieån Vieät Nam. Moãi loaøi ñeàu ñöôïc ñònh teân khoa hoïc, moâ taû hình thaùi, phaân boá, hình veõ vaø khoùa xaùc ñònh loaøi. I. INTRODUCTION II. MATERIALS AND METHODS The genus Charybdis de Haan, All specimens concerned in this 1833, which is considered after paper were collected from the surveys Thalamita because of their close of Marine Study Program conducted in relationship (Stephenson and Hudson, the coastal provinces of Vietnam in the 1957), has been monographed by Leen periof of 1970 - 2001 and deposited at (1938). the Oceanographic Museum and the In Vietnam, there have been very Depart. of Aquaculture Biotechnology of few studies on Charybdis. The studies the Institute of Oceanography (IO) in of Serene (1937), Dawydoff C. (1952), Nha Trang and the Museum of Hai Starobogatov (1972), N. V. Chung Phong Branch of IO. They were (1978, 1980, 1991, 1995) focusing identified by the methods of Sakai T. mainly on taxonomy and distribution of (1940), Stephenson W. (1957) and the genus. Some species (Charybdis Miyake S. (1998). feriatus, C. natator, C. miles... are the III. RESULTS most abundant and widely distributed. The C. hongkongensis is almost Key to species of the genus observed only in Tonkin Gulf. This Charybdis paper presents in detail and discusses 1(2) Basal antennal joint does join about the taxonomy of the genus front, hence antennal flagellum stands Charybdis in Vietnam. in upper portion of orbit... 167 C. (Gonioneptunus) bimaculata 17(18) Propodus of cheliped more 2(1) Basal antennal joint joins front, inflated, carapace with conspicuous excluding antennal flagellum from crooss-like mark... orbit… 3 C. (Charybdis) feriatus 3(8) Posterior border of carapace 18(17) Propodus of cheliped not straight, posterodistal border of arm of inflated, carapace without crooss-like cheliped spinuous 4 mark... 4(5) Epibranchial tooth shorter than C. (Charybdis) miles other anterolateral teeth... 19(16) Propodus of cheliped with 5 C. (Goniohellenus) truncata spines ... 5(4) Epibranchial tooth longer than C. (Charybdis) affinis others... 6 20(13) First anterolateral tooth not 6(7) Epibranchial tooth slightly longer truncated... 21 than the others, sixth segment of male 21(22) Second anterolateral tooth much abdomen with lateral margin slightly smaller than the first ... conver ... C. (Charybdis) anisodon C. (Goniohellenus) hongkongensis 22(21) Second anterolateraltooth 7(6) Epibranchial tooth distinctly subequal to first... 23 longer than the others, sixth segment 23(24) Natatory leg with spinose of male abdomen with lateral margin carpus... strongly conver ... C. (Charybdis) hellerii C. (Goniohellenus) vadorum 24(23) Natatory leg without spinose 8(3) Posterior border of carapace carpus ... 25 curved, posterodistal border of arm of 25(26) Median lobule of lateral part of cheliped not spinous ... 9 orbital ventral margin acutely 9(12) Cardiar region with conspicuous dentiform... ridge ... 10 C. (Charybdis) lucifera 10(11) Median and first lateral front 26(25) Median lobule of lateral part of teeth more protruding than second orbital ventral margin not dentiform... lateral front teeth ... C. (Charybdis) annulata C. (Charybdis) variegate Charybdis (Gonioneptunus) 11(10) Median and first lateral front bimaculata (Miers, 1886) (Fig. 1) teeth not longer than second front Gheï Bi-Ma teeth... C. (Charybdis) natator Goniosoma variegatum var. bimaculatum Miers 1886: 191, pl. 15, fig.3 12(9) Cardiar region without ridge... 13 Charybdis subrogate Rathbun, 1902: 28 13(20) First anterolateral tooth more Charydis (Gonioneptunus) bimaculata and less truncated... Alcock 1899: 69 14(15) Merus of chelipeds with 2 spines Carapace covered with a coat of on anterior margin... 14 downy fur and scattered granules. C. (Charybdis) callianassa. Cardiac and mesobranchial regions 15(14) Merus of chelipeds with 3 or provided with granulated elevations. A more than 3 spines anterior margin..16 distinct spot of dark-red coloration 16(19) Propodus of chelipeds with 4 presents on each mesobranchial region. spines... 17 Anterolateral margin with 6 teeth, the first the largest, the second 168 the smallest, to the fifth gradually both sides angled. Basal segment of decreasing in size. antennal armed with a granulated Front divided into 6 teeth, the crest. middle two lower in position but more Front divided into obtuse teeth; projecting, the outermost pair smaller the middle two rather prominent, the and tending to unite the supraorbital outermost one smaller, deeply teeth. separated from the adjacent one. Chelipeds asymmetrical, merus Chelipeds asymmetrical, merus with 3 spines on the anterior margin, a with 3 spines on the anterior margin spinule at the end of the posterior and spinules on the posterior margin; margin. Carpus with a long spine at surface covered with granules arranges the inner angle and 3 spines on the in transversecarenae. Carpus with 3 outer surface. Produces with 2 distinct dorsal granular carinae. granulated carinae and 2 spines on Propodus covered with 7 granulated dorsalsurface, 3 granulated ridges on carinae in all on the surface; dorsal the outer and 1 on the inner surface. surface armed with 3 spines. Merus of Merus of natatory legs with a long natatory legs with a spinule at subend spine at subtip of the posterior margin; of the posterior margin; propodus propodus with smooth posterior bearing about 8 spinules on the margin. posterior margin. Size: Carapace breadth of 25-35 mm. Size: Carapace breadth of 45-55 mm. Habitat: Sandy, muddy-sandy or Habitat: Muddy and muddy-sandy broken shelly bottoms, 2 - 35 m deep. bottom, 5- 60 m deep. Conservation: Inst. Ocean. in Nha Conservation: Inst. Ocean. in Nha Trang. Trang. Distribution: South Africa, India, Distribution: India, Australia, Japan, Korea, Japan, Australia, China, China, Indonesia, Philippines, Malaysia, and Singapore. Vietnam: Malaysia, Singapore. Vietnam: Tonkin Tonkin Gulf, coast of Central Vietnam. Gulf, coast of Central and Southern Vietnam. Charybdis (Goniohellenus) Charybdis (Goniohellenus) truncata (Fabrics, 1798) (Fig. 2) hongkongensis (Shen 1934) (Fig. 3) Gheï Traùn -Thaúng Gheï Hoàng -Koâng Portunus truncata Fabricius 1798: 365 Charybdis (Goniohellenus) hongkongensis, Thalamita truncata H. Milne -Edwads 1934: 46, figs. 11-12 1834: 463 Carapace covered with a coat of Goniosoma ornatum A. Milne - Edwards 1861: 376 downy fur, regions well defined; Charybdis (Goniohellenus) truncata metagastric, cardiac and mesobranchial Balss 1922: 103 regions marked with obvious Carapace covered with downy fur, granulated elevations. regions well defined; metagastric, Anterolateral margin cut into 6 cardiac and mesobranchial regions teeth; the first two obtuse and set marked with granual patches. closer to each other; the last one longer Anterolateral margin divided into 6 than the others. Antennal basal teeth, decreasing in size, the last one segment with granulated ridge. the smallest. Posterior margin straight, 169 Front divided into 6 teeth, the teeth, the first produced anterolateral, middle four subequal but the two the second to fourth gradually central ones more prominent; the increasing in size, the fifth smaller outermost one smaller, separated from than the fourth, the epibranchial tooth the inner one by a V-shaped notch, the longest. Antennal basal segment Chelipeds asymmetrical; merus with 3 provided with a low granulated crest. curved spines, tip directed lateral and Front divided into 6 teeth, the with a spine at the end of the posterior middle two lower in position, the next margin; propodus marked with 3 pair larger than the outermost pair and granulated ridges on the outer surface, deeply separated from each other. in which the lowest one extends to the Chepipeds covered with a tip of the immovable finger, dorsal squamiform process. Merus with 2 surface with 3 spines, the base of the teeth on the anterior margin and 1 teeth with depressed granules; fingers spinule at the end of the posterior relatively long, armed with strong margin. Carpus with 1 stout spine at teeth, alternately large and small . the inner-distal and 2 spines on the Natatory legs with merus longer than outer side. Propodus marked with 6 broad, bearing one long spine at carinae, of which 2 on the dorsal posterodistal angle; propodus with surface. Merus of natatory legs with 2 spines on the posterior margin. spines on the posterior margin; Size: 3 specimens, Carapace breadth of propodus with 6-7 spines on the 40-48 mm. posterior margin. Habitat: Sandy and sandy-muddy Size: Carapace breadth of 24-30 mm. bottoms, 10-80 m deep. Habitat: 3 specimens. Sandy and Conservation: Zoolozical Institute, muddy bottoms, 5-60 mm. Academy of Sciences of the Russia. Conservation: Hai Phong Branch of Distribution: Australia,
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