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7 中華民國七十八年 Taiwan Mus On the Parribacus Lobsters (Crustacea: Decapoda: Scyllaridae) of Taiwan 臺灣産岩礁扇蝦類之研究 Tin-Yam Chan and Hsiang-Ping Yu 陳人任游祥平 CRUBTACEA ro A .山 JOURNAL OF TAIWAN MUSEUM 42(1): 1-7 JUNE 1989 臺灣省立博物館半年刊第四十二卷第一期1〜7 中華民國七十八年 Taiwan Mus. 42 (1): 1-7 June 1989 On the Parribacus Lobsters (Crustacea: Decapoda: Scyllaridae) of Taiwan* CRUSTACEA LIBRAE Tin-Yam Chan** and Hsiang-Ping Yu* SMITHSONIAN INST, RETURN TO W-119 Accepted Dec. 15, 1988 摘要 陳天任游祥平臺灣産岩礁扇蝦類之研究臺灣萏立博物館半年刊似(1) ：1 — 7 June 1989 本報告報導二種樓息於臺灣沿岸岩礁之岩礁扇蝦。分別爲南極岩礁扇蝦 Parribacus antarcticus (Lund, 1793)禾 1J 曰本岩节焦 II 虫叚 P. japonic us (Holthuis, 1960 )。此兩種岩碟扇蝦均具經濟價値。前者主要分佈在本杏南部沿岸，而後 者則以北部沿岸爲多。 本文除比較兩種蝦之外部形態特徵、體色外，同時附丨：檢索衷及彩色圖片 以洪參考。 關鍵詞：蟬蝦科,妁礁_蝦，新記錄，賴。 Abstract In addition to the long recorded Parribacus antarcticus (Lund, 1793), one more Parribacus species, P. japonicus Holthuis, 1960, is found in Taiwan. Both species inhabit rocky and coral reefs, but with P. japonicus appeared to be mainly distributed off the northern coast while P. antarcticus mostly in the south. These slipper lobsters are taken incidental to fisheries for spiny lobsters and are highly valued sea-food. A key to their identification and color illustra- tions of these two Parribacus lobsters are provided. Key words: Slipper lobsters, Parribacus, new record, Taiwan. Introduction with squamiform tubercles and short hairs. Six extant species of this genus are konwn at Slipper lobsters of the genus Parribacus are present and all are inhabitants of rocky and characterized by the carapace being strongly coral reefs in shallow tropical and sub-tropical dorso-ventrally compressed and bearing large seas (Holthuis 1985). Only the widely dis- teeth along the lateral margins, and the dorsal tributed Parribacus antarcticus (Lund, 1793) surfaces of the body being entirely covered has been reported to occur in Taiwan (eg. Oo * Contribution No. NSC77—0409-B019—04. ** Graduate School of Fisheries, National Taiwan College of Marine Science and Technology, Keelune. Taiwan, Republic of China. 2 Parribacus Lobsters of Taiwan 1937; Hwang and Yu 1980，1983; Holthuis coming fainter at ventral surfaces 1985). Parribacus lobsters are accidentally P. antarcticus caught as by-catch of spiny lobster fishery and lb. Rostral tooth absent; antennal segment can be sporadically seen in the market. They IV with 5 large outer teeth (excluding are usually sold live in sea-food restaurants apical tooth); median carina at abdominal somites II and III almost leveled; body at a rather high price (about NT$l,000/kg) reddish and pereiopods with conspicuous with a common name "Flapping-Shrimp-Aun- deep-blue rings P. japonicus tie" ( fittlfif/- ). Recently, when the authors examined the slipper lobsters displayed in the Parribacus antarcticus (Lund, 1793) aquaria at sea-food restaurants, we discovered (Plate I a and b) that the Taiwanese Parribacus lobsters contain one more species. It is found that the species Scyllarus antarcticus Lund, 1793: 22 (not reported as P. antarcticus by Hwang and Yu seen, type locality: Amboina, Moluccas). (1983) is actually a misidentiflcation of P. Ibacus antarctius 一 White, 1847: 68; Haswell, japonicus Holthuis, 1960, a species which 1882: 169. is thought to occur in Japan only (Phillips et. Parribacus antarcticus — Dana, 1852: 517; al. 1980; Holthuis 1985). With the addition Rathbun, 1906: 896; Holthuis, 1946: of P. japonicus, the list of Taiwanese scyllarid 102 (p.p.)； Forest, 1954: 345; Harada, lobsters becomes 5 genera and 14 species (see 1965: 37; Kubo, 1971: 627; Phillips, Hwang and Yu 1983; Chan and Yu 1986). Cobb and George, 1980: 71; Hwang and This report briefly describes the two Parribacus Yu, 1980: 152; Burukovsky, 1983: 144; Holthuis, 1985: 73; Williams, 1986: 27. species, together with a key and colour illustra- Paribacus antarcticus - Ortmann, 1891: 45 tions for their identification. (P.P. ？)• Paribaccus antarcticus — Balss, 1914: 81 (p.p. Materials and Methods ？). ParribacusParrae — Dana, 1852: 517; De Man, The specimens were brought from sea-food 1916: 66. restaurants in north-eastern Taiwan. They are Paribaccus parra - Balss, 1914: 81. deposited at the Department of Fisheries in Parribacus papyraceus — Rathbun, 1906: 897. National Taiwan College of Marine Science Parribacus ursus - Stebbing, 1915: 63. and Technology (NTCMST). As to the meas- Parribacus ursus major — De Man, 1916: 66; urements, carapace length (cl.) and body length Barnard, 1950: 565; Kensley, 1981: 30. (bl.) were measured from the apex of rostrum Parribacus ursus major carinata - De Man, to the posterior margin of the carapace and 1916: 66. to the distal telson margin of fully stretched Paribacus ursus major — Parisi,1917: 13 (p.p.). specimen respectively. The terms used in des- Parribacus ursus-mafor — Boone, 1935: 54; cribing the various parts of scyllarid lobsters Oo, 1937: 30. follow Holthuis (1985) and Chan and Yu [？] Scyllarus carinatus — Holthuis, 1946: 89. (1986). [not] Parribacus antarcticus - Utinomi, 1967: 62; Kubo, 1970: 98; Hwang and Yu, Key to the Parribacus lobsters of Taiwan: 1983: 263. {^Parribacus japonicus Hol- thuis, 1960) la. Rostral tooth distinct; antennal segment Parribacus japonicus [non] Holthuis, 1960 — IV with 6 large outer teeth (excluding Miyake, 1982: 89. apical tooth); median carina at abdominal somites II and III markedly elevated; body Material Examined: yellowish; green bands on pereiopods be- 1 d cl. 65 mm, bl. 144 mm, 26 May 1988; T. Y. Chan and H. P. Yu 3 1 6 cl. 48 mm, bl. 106 mm, 8 June 1988, Fu- Distribution: Long, I-Lan County. World wide tropical and subtropical seas: Diagnosis: Caribbean Sea, Indo-West-Pacific. Coral and rocky reefs at depths of usually less than 20 m. Rostrum bearing well-marked rostral tooth. Posterior anterolateral tooth only slightly Remarks: smaller than anterior one. Antennal segment VI with 7 large anterior teeth and 1 large inner P. antarcticus is unmistakable by the me- tooth. Antennal segment IV bearing 6 large dian carina of abdominal somites II and III outer teeth, an apical tooth and 2 large anterior being highly elevated at anterior end and the teeth. Abdominal tergite I covered with flat- antennal segment IV usually bearing six large tened tubercles, provided with a distinct row outer teeth (sometimes these teeth and the of scallop groove submedially (joining lateral apical tooth may be bifurcated or trifurcated). deep grooves) and many short oblique grooves The transverse grooves at abdominal tergites near posterior border. Articulated surfaces in this species are always wider than those in of abdominal tergites II to V marked with P. japonicus. P. antarcticus can also be easily rounded tubercles. Transverse groove between articulated and non-articulated surfaces at separated from P. japonicus by its special abdominal tergites wide, naked and well-ex- colouration. posed, especially at II and III but with some The specimens examined were bought small tubercles at middle. Median carina on live from sea-food restaurants in north-eastern abdominal tergites II and III high and markedly Taiwan. They were said to be transported from elevated at anterior end. the south by wholesalers but the exact origin was not clear. Commercial lobster divers in Colour: the northern region also said that this "yel- Body dorsally yellowish with deep-brown lowish" species was not found in their fishing and black patches. Rostrum purple while ros- area. An examination of their Parribacus tral tooth light purple with purplish tip. Orbi- catch (about 50 individuals) were all P. japoni- tal ridge entirely purple. Large teeth on lateral cus. The records of P. antarcticus in Taiwan carapace and margins of antennal segments are all in the southern regions (Oo 1937; with yellow tips, followed orderly by trace Hwang and Yu 1980; Holthuis 1985 p. 76). The P. antarcticus reported from Keelung of orange, narrow band of light purple (some- (northern Taiwan) by Hwang and Yu (1983)， times very confined), band of deep-brown, after re-examined by the authors, was actually patch of light purple and then black with light a misidentification of P. japonicus. Therefore, purple and yellow dots. Abdominal somites it is highly likely that P. antarcticus is mainly yellowish with two thick lateral black lines. distributed in southern Taiwan. Mid-area of abdominal tergite I yellow with some small brown patches and a median deep- Although Holthuis (1985) was doubtful brown spot at posterior border. Articulated on the distribution of P. antarcticus in Japan, surfaces of abdominal tergites II and III yellow it appears that this species does occur in south- with three black spots while those of IV and V ern Japan. The illustration of P. japonicus dark colored. Ventral surface of body greenish from Ishigaki Island (south of Ryukyu Is- yellow and distributed with faint green spots. lands) provided by Miyake (1982) is almost Pereiopods greenish yellow and marked with identical in colour with our P. antarcticus. Fur- green bands, but color at bands becoming thermore, the figure of P. antarcticus provided fainter at ventral surface. Tail-fan light brown by Kubo (1971, fig. 1022) bears six outer teeth with scattered deep-blue dots. Freshly ejected at the antennal segment IV, a character typical spermatophore white. to P. antarcticus. 4 Parribacus Lobsters of Taiwan Parribacus japonicus Holthuis, 1960 Colour: (Plate I c and d) Dorsal surface of carapace red-brown with yellow-brown patches. Orbital ridge and ros- Paribacus antarcticus [not Parribacus antarcti- trum mainly red-brown. Antennal segment VI cus (Lund, 1793)] -
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