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New Records of Hippolytid Shrimps, <italic>Lebbeus speciosus</italic> and <italic>Lebbeus comanthi</italic> (Crustacea: Decapoda: Caridea) from the East Sea, Korea
New Records of Hippolytid Shrimps, Lebbeus speciosus and Lebbeus comanthi (Crustacea: Decapoda: Caridea) from the East Sea, Korea
Animal Systematics, Evolution and Diversity. 2013. Jan, 29(1): 84-91
Copyright ©2013, The korean Society of Systematic Zoology
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
  • Received : September 09, 2012
  • Accepted : October 10, 2012
  • Published : January 31, 2013
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About the Authors
Chu Lee
East Sea Fisheries Research Institute, National Fisheries Research and Development Institute, Gangneung 210-861, Korea
Hyun Sook Ko
Department of Biological Sciences, Silla University, Busan 617-736, Korea
Kyu Hyun Lee
Department of Biological Sciences, Silla University, Busan 617-736, Korea
celllove1@naver.com
Abstract
Two species of the hippolytid shrimps, Lebbeus speciosus and Lebbeus comanthi , are described and illustrated for the first time in Korea. They were collected from the East Sea. Lebbeus speciosus was found in a scallop farm of Jumunjin, Gangneung, and L. comanthi associated with crinoids, was found in Gampo, Gyeongju. The difference between these two related species is in the number of dorsal teeth of the rostrum, five teeth in L. speciosus and a single tooth in L. comanthi . The Korean Lebbeus species has increased to 6 species by the present report. They are L. grandimana , L. polaris , L. unalaskensis , L. groenlandicus , L. speciosus , and L. comanthi .
Keywords
INTRODUCTION
The hippolytid genus Lebbeus currently contains 61 species in the world (De Grave and Fransen, 2011; Komai, 2011; Komai et al., 2012; Nye et al., 2012), of which only four species have been reported from Korean waters (see The Korean Society of Systematic Zoology, 1997; Cha et al., 2001; Kim et al., 2007, 2010): Lebbeus groenlandicus (Fabricius, 1775), L. grandimana (Brashnikov, 1907), L. unalaskensis (Rathbun, 1902), and L. polaris (Sabine, 1824). Two species of hippolytid shrimps collected in a scallop farm of Jumunjin, Gangneung, and in Gampo, Gyeongju, by SCUBA diving to a depth of approximately 15 m, were identified as Lebbeus speciosus (Urita, 1942) and Lebbeus comanthi Hayashi and Okuno, 1997, respectively. They are described and illustrated in the present study.
Postorbital carapace length is abbreviated as “CL”. It is used as an indication of the size of the specimen, and is measured from the posterior margin of the orbit to the posterior mid-dorsal margin of the carapace. All specimens were preserved in 95% ethanol. Materials examined in this study are deposited in the second author’s collection of Silla University, Busan.
SYSTEMATIC ACCOUNTS
  • Order Decapoda Latreille, 1803
  • Family Hippolytidae Bate, 1888
  • GenusLebbeusWhite, 1847
  • 1*Lebbeus speciosus(Urita, 1942) (Figs. 1-3)
Spirontocaris makarofi speciosa Urita, 1942: 19, fig. 4.
Lebbeus possjeticus Kobjakova, 1967: 235, fig. 4; Wicksten and Méndez, 1982: 118.
Lebbeus speciosus : Miyake, 1982: 53, Pl. 18, fig. 2; Hayashi, 1992: 132, figs. 13, 14; Minemizu, 2000: 98; Wicksten, 2011: 103; De Grave and Fransen, 2011: 426 (list).
Material examined. 1♂ (CL 5.9 mm), Korea: Jumunjin, Gangneung, 31 Mar 2011, Lee SH, scallop farm.
Description. Small-sized body. Rostrum ( Fig. 1 A, B) straight,
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Lebbeus speciosus, male (postorbital carapace length 5.9 mm). A, Habitus, lateral; B, Carapace, lateral; C, Left antennule, dorsal; D, Left scaphocerite, dorsal; E, Left third maxilliped, lateral; E′, Left third maxilliped, distal segment; F, Telson, dorsal. Scale bars: A-F=1 mm, E′=0.5 mm.
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Lebbeus speciosus, male (postorbital carapace length 5.9 mm). A, Left First pereopod, lateral; B, Left Second pereopod, lateral; B′, Setae on ischium of second pereopod, proximal; C, Left Third pereopod, lateral; C′, Same, Dactylus; D, Left Fourth pereopod, lateral; D′, Same, Dactylus; E, Left fifth pereopod, lateral; E′, Same, Dactylus. Scale bars: A-E=1 mm, B′-E′=0.5 mm.
exceeding distal margin of antennular peduncle, with 5 dorsal, 2 ventral teeth distally. Carapace ( Fig. 1 A, B) not carinate on mid-dorsal line, with 2 teeth on anterior one-thirds; supraorbital spine well-developed; antennal and pterygostomial spines acutely pointed. Abdomen ( Fig. 1 A) smooth dorsally; pleura of first and third somites rounded ventrally, those
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Lebbeus speciosus, male (postorbital carapace length 5.9 mm).
of fourth and fifth somites pointed posteroventrally. Telson ( Fig. 1 A, F) 1.4 times as long as sixth abdominal somite, with 4 pairs of spines dorsolaterally; posterior margin with 3 pairs of unequally-sized spines. Eyes ( Fig. 1 A) cylindrical; eyestalk slightly longer than cornea. Antennular peduncle ( Fig. 1 C) short; first segment with 3 (1 sub-medially, 2 distolaterally) spines; stylocerite slightly exceeding distal margin of first segment; second segment twice as long as third one, with strong lateral spine on subdistal margin; third segment with smaller spine distolaterally; outer flagellum swollen, inner flagellum slender. Antennal scaphocerite ( Fig. 1 D) 3.0 times as long as broad; outer spine reaching distal margin of lamella. Third maxilliped ( Fig. 1 E, E′) long, exceeding antennal scaphocerite; distal segment 3.4 times as long as subdistal segment, with rows of transverse setae, with 12 (6 movable, 6 immovable) spinules near apex. First pereopod ( Figs. 1 A, 2 A) moderately stout, reaching distal margin of antennal scaphocerite. Second pereopod ( Figs. 1 A, 2 B, B′) slender, exceeding distal margin of antennal scaphocerite; ischium with 3 stiff setae proximally; carpus 7-articulated; chela small. Third pereopod ( Figs. 1 A, 2 C, C′) exceeding distal margin of antennal scaphocerite; merus with 4 spines. Fourth pereopod ( Figs. 1 A, 2 D, D′) reaching beyond antennal scaphocerite by length of dactylus; merus with 3 spines. Fifth pereopod ( Figs. 1 A, 2 E, E′) slightly shorter than fourth pereopod; merus with 1 subterminal spine. Dactyli of last three pereopods ( Fig. 2 C′-E′) terminating in 2 claws, each with 4 spines on posterior margin.
Color. Body semitransparent, with red bands. White bands prominent on telson. Pale blue bands on abdomen. Pereopods with red and white bands ( Fig. 3 ).
Distribution. Japan, Sakhalin, Siberia, Bering Island, California (Wicksten, 2011), and now Korea.
Remarks. This specimen generally agrees well with the description of Hayashi (1992), however, it slightly differs by having a rostrum with 2 ventral teeth, not 3 ventral teeth. This difference is maybe due to the much smaller size of our specimen (CL 5.9 mm) compared with that of Hayashi (CL 7.0 mm).
  • 1*Lebbeus comanthiHayashi and Okuno, 1997 (Figs. 4-6)
Lebbeus comanthi Hayashi and Okuno, 1997: 49, figs. 1-4; Minemizu, 2000: 96; De Grave and Fransen, 2011: 424 (list).
Material examined. 1♀ (CL 4.9 mm), Korea: Gampo, Gyeongju, 30 May 2012, Lee SH, by SCUBA diving to a depth of 15 m.
Description. Small-sized body. Rostrum ( Fig. 4 A, B) straight, not exceeding distal margin of first segment of antennular peduncle, with dorsal tooth medially, ventral tooth distally; apex acutely pointed. Carapace ( Fig. 4 A, B) smooth, with
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Lebbeus comanthi, female (postorbital carapace length 4.9 mm). A, Habitus, lateral; B, Carapace, lateral; C, Left antennule, dorsal; D, Left scaphocerite, dorsal; E, Left third maxilliped, lateral; E′, Left third maxilliped, distal segment; F, Telson, dorsal. Scale bars: A-F=1 mm, E′=0.5 mm.
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Lebbeus comanthi, female (postorbital carapace length 4.9 mm). A, Left first pereopod, lateral; B, Left second pereopod, lateral; C, Left third pereopod, lateral; C′, Same, dactylus; D, Left fourth pereopod, lateral; D′, Same, dactylus; E, Left fifth pereopod, lateral; E′, Same, dactylus. Scale bars: A-E=1 mm, C′-E′=0.5 mm.
tooth dorsoanterially; supraorbital spine strong, well-developed; antennal spine small, acutely pointed; pterygostomial spine minute. Abdomen ( Fig. 4 A) smooth dorsally; pleura of first four somites rounded ventrally; pleuron of fifth somite pointed posteroventrally; sixth abdominal somite 1.6 times as long as fifth somite. Telson ( Fig. 4 F) 1.5 times as long as
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Lebbeus comanthi, female (postorbital carapace length 4.9 mm).
sixth somite, with 3 or 4 spines dorsolaterally; posterior margin with 3 pairs of unequally-sized spines. Eyes ( Fig. 4 A) cylindrical; eyestalk as long as cornea. Antennular peduncle ( Fig. 4 C) short; first segment with 5 (1 sub-medially, 4 distolaterally) spines; stylocerite reaching distal margin of first segment; second segment as long as third one, with strong spine distolaterally; third segment with small spine distolaterally; outer flagellum swollen, inner flagellum slender. Antennal scaphocerite ( Fig. 4 D) 3.1 times as long as broad; outer spine exceeding distal margin of lamella. Third maxilliped ( Fig. 4 A, E, E′) long, exceeding antennal scaphocerite; distal segment 3.0 times as long as subdistal segment, with rows of transverse setae, with 10 (7 movable, 3 immovable) spinules near apex. First pereopod ( Figs. 4 A, 5 A) moderately stout, reaching distal margin of antennal scaphocerite. Second pereopod ( Figs. 4 A, 5 B) slender, exceeding distal margin of antennal scaphocerite; merus unarmed; carpus 7-articulated; chela small. Third pereopod ( Figs. 4 A, 5 C, C′) exceeding distal margin of antennal scaphocerite by length of dactylus; merus with 2 spines. Fourth pereopod ( Figs. 4 A, 5 D, D′) reaching distal margin of antennal scaphocerite, merus with 2 spines. Fifth pereopod ( Figs. 4 A, 5 E, E′) as long as fourth pereopod; merus with 1 spine. First three pereopods with epipods; dactyli of last three pereopods ( Fig. 5 C′-E′) terminating in 2 claws, each with 4 spines on posterior margin.
Color. Body semitransparent; red and yellow bands obliquely on carapace, longitudinally on abdomen. Pereopods and pleopods red ( Fig. 6 ).
Distribution. Japan (Hayashi and Okuno, 1997) and now Korea.
Remarks. This specimen generally agrees well with the original description of Hayashi and Okuno (1997), However, it slightly differs from the Hayashi and Okuno’s specimen in that a pleuron of the fourth abdominal somite is rounded posteriorly. The shape of the fourth abdominal somite has been considered to be a diagnostic character in species of Lebbeus (Hayashi, 1992; Fransen, 1997; Komai, 2001). Recently, this character was found to be variable in Taiwan species of Lebbeus (Chang et al., 2010).
Currently, six Lebbeus species have been recorded from Korean waters. They can be divided into two groups: 1) the first group is L. grandimana , L. polaris , and L. unalaskensis , having the first two pereopods with epipods, and 2) the second group is L. groenlandicus , L. speciosus , and L. comanthi , having the first three pereopods with epipods. In the second group, the pleuron of the abdominal somite is acutely toothed ventrally in L. groenlandicus , while it is rounded or slightly pointed posteroventrally in L. speciosus and L. comanthi . The difference between L. speciosus and L. comanthi is in number of the dorsal teeth of the rostrum, five teeth in the former and a single tooth in the latter. L. comanthi is the only Lebbeus shrimp having a symbiotic relationship with crinoids in the region.
Korean name: 1*색동가시배새우 (신칭)
Korean name: 1*갯고사리새우 (신칭)
Acknowledgements
This work was supported by “The Survey of Korean Indigenous Species” from National Institute of Biological Resources (NIBR) of Ministry Environment of Korea.
References
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