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A New Record of <italic>Cymatium encausticum</italic> (Ranellidae: Tonnoidea: Gastropoda) from Korea
A New Record of Cymatium encausticum (Ranellidae: Tonnoidea: Gastropoda) from Korea
Animal Systematics, Evolution and Diversity. 2012. Jul, 28(3): 212-214
Copyright ©2012, 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 : March 03, 2012
  • Accepted : April 04, 2012
  • Published : July 31, 2012
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About the Authors
Junhee Lee
Department of Parasitology, College of Medicine, Chungbuk National University, Cheongju 361-763, Korea
Sang-Hwa Lee
Graduate Program in Cellular Biology and Genetics and Department of Parasitology, College of Medicine, Chungbuk National University, Cheongju 361-763, Korea
Jongrak Lee
Marine Biodiversity Research Institute, INTHESEA KOREA Inc., Jeju 697-110, Korea
Joong-Ki Park
Department of Parasitology, College of Medicine, Chungbuk National University, Cheongju 361-763, Korea, Graduate Program in Cellular Biology and Genetics and Department of Parasitology, College of Medicine, Chungbuk National University, Cheongju 361-763, Korea
jkpyou@chungbuk.ac.kr, jkpyou@gmail.com
Abstract
The Cymatium Röding, 1798 is a small- to large-sized marine gastropod genus. Three species has been reported thus far for Cymatium in the Korean waters. In general, Cymatium encausticum (Reeve, 1844) is known to occur in tropical seawaters including the Philippine Islands along with its congeners C. gutturnium , C. springsteeni , and C. exile . A single individual of the species was collected from Jejudo Island by SCUBA diving and morphological features were observed using a stereomicroscope. This is the first study to report the occurrence of Cymatium encausticum (Reeve, 1844) from the Korean waters, providing a detailed description of the species with the illustration for the shell morphology.
Keywords
INTRODUCTION
The Cymatium Röding, 1798 is a small- to large-sized marine gastropod genus, ranging from a few cm to nearly 20 cm in shell height. It contains approximately a hundred species (the number of species is variable according to the taxonomic authorities), many of which are found in tropical waters (Henning and Hemmen, 1993). Cymatium is carnivorous that normally feeds on a variety of invertebrates, such as tube worms, ascidians, and other bivalve mollusks, including clams and oyster species (Houbrick and Fretter, 1969; Littlewood, 1989; Govan, 1995). The external morphology of this genus is characterized by having a club-shaped shell with an ornamentation of knob, spiral ribs, and axial varices. To date, three Cymatium species have been reported in the Korean waters: Cymatium parthenopeum echo Kuroda and Habe, 1961, C. comptum (Adams, 1855), and C. tenuiliratum (Lischke, 1873).
In this study, we report a new record of Cymatium encausticum (Reeve, 1844) in the Korean waters, providing a description of the species with illustration for the shell morphology. A single individual of the species was collected from Jejudo Island at a depth of 9 meters by SCUBA diving on November 2010 and transferred to the laboratory after a fixation in 95% ethanol. Morphological features were observed using a stereomicroscope (Leica MZ12.5, Germany). The specimen used in this study was deposited (registration no. G00000106) in the Marine Mollusk Resources Bank of Korea (MMRBK) at Chungbuk National University in Korea.
SYSTEMATIC ACCOUNTS
  • Class Gastropoda Cuvier, 1797
  • Superfamily Tonnoidea Suter, 1913
  • Family Ranellidae Gray, 1854
  • Subfamily Cymatinae Iredale, 1913 (1854)
  • GenusCymatiumRöding, 1798
  • 1*Cymatium encausticum(Reeve, 1844) (Fig. 1)
Triton encausticus Reeve, 1844: P1. 12, fig. 43.
Cymatium pyriformia : Yen, 1942: 215, Pl. 18, fig. 111.
Ranularia encaustica : Habe, 1964: 72, Pl. 22, fig. 15.
PPT Slide
Lager Image
The shell of Cymatium encausticum (Reeve, 1844). A, Ventral view; B, Dorsal view. Scale bar=20 mm.
Cymatium (Ranularia) encausticum : Beu, 1986: 296, figs. 78- 80; Henning and Hemmen, 1993: 77, Pl. 16, fig. 1; Poppe, 2008: 648, Pl. 269, figs, 4, 5.
Material examined. 1 individual (collected alive), Jeju-do, Seogwipo-si, Beophwan-dong, Beomseom, depth of 9 m by scuba diving, 6 Nov 2010.
Measurement. Shell height 57.7 mm; shell width 32.8 mm.
Description. Shell solid, club-shaped, whitish brown in color; spire very short accounting for less than 1/4th of shell height; each whorl with thick spiral ribs crossed by axial cords, making the shoulder angulated; body whorl well-developed having 11 axial ribs covered with dark-brown, bristled periostracum; aperture ovate with a prominent posterior canal; parietal wall strongly calloused, extending to shoulder of penultimate whorl; outer lip very thick, red-yellow with seven nodules extending inside outer lip; siphonal canal markedly long (accounting for almost 1/3rd of shell height), narrow, and noticeably recurved backward.
Habitat. Bedrock of 5-10 m deep.
Distribution. Philippine, Taiwan, Vietnam, Japan, and Korea (Jejudo Island).
Remarks. This species is similar to its congener C. gutturnium (Röding, 1798) in size and general appearance, but differs from it in a suit of apertural features: the callus of parietal lip in C. encausticum is much more developed, reaching into the shoulder of the penultimate whorl, than in any other congeneric species, including C. gutturnium . The axial ribs of this species are less prominent that those found in C. gutturnium . This species has been known to occur with C. gutturnium , C. springsteeni , and C. exile , mostly in tropical seawaters including the Philippine Islands (Beu, 1986). This is the first case report of its occurrence in the Korean waters.
Korean name: 1*곤봉수염고둥(신칭)
Acknowledgements
This work was supported by a grant from Marine Biotechnology Program funded by Ministry of Land, Transport and Maritime Affairs (MMRBK; Marine Mollusk Resource Bank of Korea) of Korean Government.
References
Beu AG 1986 Taxonomy of gastropods of the families Ranellidae (=Cymatiidae) and Bursidae. Part 2. Descriptions of 14 new modern Indo-West Pacific species and subspecies, with revisions of related taxa. New Zealand Journal of Zoology 13 273 - 355
Govan H 1995 Cymatium muricinum and other ranellid gastropods: major predators of cultured tridacnid clams. International Center for Living Aquatic Resources Management Manila 1 - 136
Habe T 1964 Shells of the western Pacific in color. Vol. 2. Hoikusha Osaka 1 - 233
Henning T , Hemmen J 1993 Ranellidae and Personidae of the world. Verlag Christa Hemmen Wiesbaden 1 - 263
Houbrick JR , Fretter V 1969 Some aspects of the functional anatomy and biology of Cymatium and Bursa. Proceedings of the Malacological Society of London 38 415 - 429
Littlewood DTJ 1989 Predation on cultivated Crassostrea rhizophorae (Guilding) by the gastropod Cymatium pileare (Linnaeus). Journal of Molluscan Studies 55 125 - 127
Poppe GT 2008 Philippine marine mollusks. Vol. 1. Gastropoda, part 1. ConchBooks Co Hackenheim 1 - 758
Reeve LA 1844 Monograph of the genus Triton. Conchologia Iconica 2 Pls 1 - 20
Yen TC 1942 A review of Chinese gastropods in the British Museum. Proceedings of the Malacological Society of London 24 170 - 289