We describe and illustrate two pontoniine shrimps,
The distribution of pontoniid shrimps extends from tropical to subtropical regions. These shrimps are usually in symbiotic relationships with a variety of other marine species, sponges,coelenterates, molluscs, echinoderms, and ascidians (Bruce, 1983). At present two species of Pontoniinae,
Two species of pontoniine shrimps, collected by SCUBA from Geojedo Island and Jejudo Island, were identified as
Postorbital carapace length is abbreviated as “CL”. It is used as an indication of the size of the specimen and 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 deposit-ed in the second author’s collection of Silla University, Busan.
Order Decapoda Latreille, 1803
Family Palaemonidae Rafinesque, 1815
Subfamily Pontoniinae Kingsley, 1878
1*Genus Cuapetes Clark, 1919
2*Cuapetes grandis (Stimpson, 1860) (Figs. 1- 3)
[Fig. 1.] Cuapetes grandis ovigerous female (postorbital carapace length 5.1 mm eggs omitted). A Habitus lateral; B Carapace lateral; C Male (postorbital carapace length 3.8 mm) carapace lateral; D Left antennule ventral; E Left scaphocerite dorsal; F Telson dorsal. Scale bars: A-F=1 mm.
C) with supraorbital spine, hepatic spine not noticeably larger than antennal spine, not extending beyond anterior margin of carapace, orbital angle triangular. Abdomen (Fig.1A) without compressed dorsal prominence on 3rd somite, 5th somite pointed, 6th somite approximately 1.5 times as long as 5th.Telson (Fig.1F) with 2 pairs of dorsolateral spines. Eye (Fig.1A) moderately small, cornea well-developed. Antennular peduncle (Fig.1 D) with 1 distolateral spine on basal segment. Scaphocerite (Fig.1 E) approximately 4 times as long as width,distolateral tooth distinctly overreaching distal margin of blade. 1st pereopod (Fig.2 A) overreaching scaphocerite by length of fingers. 2nd pereopod (Fig.2 B, B′) with fingers
[Fig. 2.] Cuapetes grandis ovigerous female (postorbital carapace length 5.1 mm eggs omitted). A Left 1st pereopod lateral; B Left 2nd pereopod lateral; B′ 2nd pereopod′s distal spine of carpus; C Left 3rd pereopod lateral; D Left 4th pereopod lateral; E Left 5th pereopod lateral. Scale bars: A-E B′= 1 mm.
0.7 times as long as palm; carpus 0.7 times as long as palm, 3.2 times as long as distal width, with distal spine; merus with distinct distal tooth on flexor margin. 3rd-5th pereopods (Fig.2 C-E) with simple dactyli; flexor margin of propodus with 7 spinules on 3rd pereopod, 8 spinules on 4th pereopod, 5 spinules on 5th pereopod; 5th pereopod not overreaching scaphocerite. Uropod (Fig.1F) overreaching extended telson.
but in our specimens it was approximately 3.2 times longer. It is generally accepted that the difference falls within the range of variation for this species. This species was found in an oyster within an artificial reef and appeared to be free-living. It is now the only species within the genus
1*Genus Periclimenes Costa, 1844
2*Periclimenes ornatus Bruce, 1969 (Figs. 4-6)
[Fig. 4.] Periclimenes ornatus male (postorbital carapace length 4.1 mm). A Habitus lateral; B Male carapace lateral; C Female (postorbital carapace length 4.8 mm) carapace lateral; D Right antennule ventral; E Right scaphocerite dorsal; F Telson dorsal. Scale bars: A-F=1 mm.
[Fig. 5.] Periclimenes ornatus male (postorbital carapace length 4.1 mm). A Left 1st pereopod lateral; B Left 2nd pereopod lateral; C Right 3rd pereopod lateral; C′ Dactyl of 3rd pereopod lateral; D Right 4th pereopod lateral; D′ Dactyl of 4th pereopod lateral; E Left 5th pereopod lateral. Scale bars: A-E=1 mm C′ D′= 0.1 mm.
it was 2.7 times longer. It is generally accepted that the dif-ference falls within the range of variation for this species. Omori et al. (1994) reported that this species had a symbiotic relationship with sea anemone such as
(Marin et al., 2005), and now in Korea.