Bull. Inst. Zool., Academia Sinica 26(4): 331-335 (1987)

SHORT NOTE MUNIDA ALBIAPICULA, A NEW SPECIES OF ANOMURAN CRUSTACEAN (DECAPODA: GALATHEIDAE) FROM TAIWAN1

KEUI BABA Faculty of Education, Kumamoto University, Kumamoto 860 Japan and HSIANG-PING YU Graduate School of Fisheries, National Taiwan College of Marine Science and Technology, Keelung 200 ROC (Received April 9, 1987) (Revision received May 25, 1987) (Accepted June 5, 1987)

Keiji Baba and Hsiang-Ping Yu (1987), Munida albiapkula, a new species of anomuran crustacean (Decapoda: Galatheidae) from Taiwan, Bull. Inst. Zool., Academia Sinica 26(4): 00-00. A new species of the galatheid crustacean, Munida albiapkula, is described from a specimen taken off the northeastern Taiwan. It is closely related to M. rufiantennulata, but differs in the supraocular spines being widely separated from the rostrum, the distomesial spine of the antennular basal segment being as large as the distolateral one, and the propodi of the second through fourth pereopods having more numerous ventral spinelets.

16 June 1985). Aumon, g a collection of decapod crusta­ Diagnosis: Body rather robust, lateral ceans recently obtained at fish harbors and margin of carapace behind cervical groove fish markets in Taiwan, an unusual specimen with 4 spines, epigastric region with row of of the genus Munida was found. It was taken 10 spines, lateral protogastric, postcervical off the northeast coast Taiwan in 50-450 m and dorsobranchial spines distinct on each by a offshore shrimp-trawler. On examina­ side. Abdomen with 2 pairs of gonopods, tion it proved to represent a new species second abdominal segment bearing line of 8 and is here described as Munida albiapkula. dorsal spines. Eyes dilated, eyelashes short. The type specimen will be deposited in Two terminal spines of antennular basal the collection of the National Museum of segment subequal in size. Merus of third Natural History, Smithsonian Institution. maxilliped with 2 mesial marginal spines, lacking distodorsal spine. Meri of second Munida albiapicula, new species and third pereopods bearing well developed distoventral spine distinctly larger than dis­ Textfigs. 1 and 2 todorsal, propodi with about 10 ventral mar­ Type Material: IS, holotype (carapace ginal spinelets, distoventral angle produced length, 20.7 mm), northeast coast of Taiwan, into slender spine, dactyli bearing row of 50-450 m deep (obtained at Ta-chi fish market, ventral spinelets. 1 Contribution No. 76-0209-B019-01, from the National Science Council, Republic of China.

331 332 K. BABA AND H.P. YU

Description of holotype: Carapace ex­ cervical groove, first anterolateral, prominent, cluding rostrum somewhat longer than wide. directed straight forward, second small; and Dorsal surface with distinct rugae of mostly 4 spines behind cervical groove well deve­ interrupted, and provided very sparsely with loped, subequal in size, and restricted to iridescent, coarse setae. Line of 5 pairs of anterior branchial region. Front margin epigastric spines, innermost and outer 3 pairs oblique. small, rnner second directly behind suprao­ Rostrum straight and horizontal, fully culars prominent. Lateral protogastric spine more than half of remaining carapace length. [ — "parahepatic spine" of Zariquiey Alvarez Supraocular spines subparallel, moderately (1952: 151)] on each side. Cervical groove remote from rostrum, terminating (left) or distinct. Anterior branchial region with well- overreaching (right) midlength of rostrum. developed spine at midway along cervical Abdomen with 2 pairs of gonopods, sec­ groove. Postcervical spine pronounced. Car­ ond tergum with line of 8 spines on anterior diac elevation indistinct. No spine on pos­ ridge. terior transverse ridge. Lateral margins sub- Cornea inflated and depressed, eyelashes parallel, armed with 6 spines: 2 in front of short.

Textfig. 1. Munida albiapicula, male holotype, dorsal view. MUNIDA ALAIAPICULA, A NEW SPECIES OF ANOMURAN CRUSTACEAN 333

Textfig. 2. Munida albiapicula, male holotype: a. carapace and abdomen, dorsal view; b. basal segment of left antennule; c. left antennal peduncle; d. proximal three segments of endopod of left third maxilliped; e. anterior part of sternal segments; f. right cheliped, proximal portion omitted; g. right second per eopod; h. distal part of right second pereopod. 334 K. BABA AND H.P. YU

Basal segment of antennule elongate; 2 ing end of carpus of right cheliped but falling terminal spines subequal in size, distolateral short of midlength of palm; merus distally spine overreaching terminals. First (basal) widened, provided with fine scaly ridges segment of antennal peduncle with prominent dorsally, bearing 10-11 dorsal and 4 ventral distomesial spine overreaching end of third spines, distoventral larger than distodorsal; segment, second segment also with distomesial carpus with 4 dorsal and 1 distoventral spines; and distolaterla spines, both well developed. propodus 8.7 times as long as wide, bearing Ischium of third maxilliped with well 10 movable spinelets on ventral margin, dis­ developed distomesial process, mesial ridge toventral angle produced into slender spine, with 30 denticles; merus with 2 mesial mar­ parallel to distoventral spinelet; dactylus 0.54 ginal spines, proximal one prominent, distal as long as propodus, gently curving, distally rather reduced, distodorsal margin unarmed. corneous, ventrally with 7-8 spinelets. Third Anterior part of sternal segments as illu­ pereopod similar to second pereopod, merus strated (Textfig. 2e); third thoracic sternum with 9 dorsals, proximal 3 slightly dorsal. medially sinuous and denticulate on anterior Merus of fourth pereopod shorter than those margin, following sternum roughly triangular, of second and third pereopods, dorsally with anterior margin contiguous with 1/3 of width 9 spines, proximal 5 much reduced in size, of preceding sternum. ventral spines reduced to 2, distal one less Chelipeds dissimilar, left one smaller, pronounced, as large as distodorsal; propodus possibly by regeneration, spinations nearly also shorter; dactylus 0.64 as long as propodus. alike. Right cheliped 2.8 times as long as Epipods absent from all pereopods. carapace including rostrum, subcylindrical, Color: Totally orange red, tips of supra­ but palm somewhat depressed; provided with ocular spines whitish, tailfan and distal por­ fine scaly ridges and very scarcely setose tions of second to fourth pereopods (whole except for fingers, merus with spines in 4 dactyli and distal parts of propodi) pale, rows: 8 middorsal, 3 dorsomesial, 4 mesial according to color photographs taken in fresh and 7 ventromesial; mesial ones prominent; state. distolateral margin also with moderate-sized Remarks: This new species is based on spine. Spinations of carpus and palm as a single specimen with unique characters that illustrated, mesial spines not exactly on line. warrant description. The carapace bearing Palm 4 times as long as wide, slightly longer less than 5 marginal spines (four in this case) than fingers. Fingers feebly gaping proxi- behind the cervical groove and the fourth mally, distally strongly curving and crossing, abdominal segment lacking spines, combina­ movable finger mesially with 1 basal and 1 tion of which is characteristic of M. albiapi- terminal spines, immovable finger, laterally cula, are also shared by four Indo-Pacific with spine at 2/3 from distal end, and 2 species: M. brucei from East Africa (Baba, terminals. Left cheliped sharter and slenderer 1974: 55), M. tuberculoid from the Fiji and than right one, scaly condition less pro­ Tonga Islands (Henderson, 1885: 413; 1888: nounced; carpus and palm distinctly narrower 145), M. rufiantennulata from Japan (Baba, than merus, markedly palm; palm about 5 1969: 23), and M. sentai from the Andaman times as long as wide, nearly as long as Sea (Baba, 1986: 628). Of these relatives, fingers. M. rufiantennulata is most closely related to Second, third and fourth pereopods de­ the new species, in having eight spines on pressed, dorsally provided with fine plumose the second abdominal segment, strong spina- setae except for distal half of propodus and tion of the antennal peduncle, and two mesial whole dactylus. Second pereopod overreach­ marginal spines on the merus of the third MUNIDA ALBIAPICULA, A NEW SPECIES OF ANOMURAN CRUSTACEAN 335 maxilliped; however, they differ in the fol­ REFERENCES lowing particulars: In M, rufiantennulata, the supraocular spines are rather close to the BABA, K. (1969) Four new genera with their repre­ sentatives and six new species of the Galathei- rostrum, the distomesial spine of the anten- dae in the collection of the Zoological Labora­ nular basal segment is much reduced in size, tory, Kyushu University, with redefinition of and the propodi of the second through fourth the genus Galathea. OHMU, Occ. Pap. Zool. Lab., pereopods bear fewer ventral spinelets. The Fac. Agr. Kyushu Univ., Fukuoka 2: 1-32. unusually oblique front margin supposed to BABA, K. (1974) Munida brucei sp., nov., a new be characteristic of M. rufiantennulata (see galatheid (Decapoda, Anomura) from the east Baba, 1969: 23) is not constant in specimens coast of Africa. Annot. Zool. Japon. 47: 55-60. of that species from the Philippines in the BABA, K. (1986) Two new species of anomuran crustaceans (Decapoda: Chirostylidae and Gal- Danish "Galathea" Expedition (unpublished); atheidae) from the Andaman Sea. J. Crust. it is less oblique, as describe here for M. Biol. 6: 625-632. albiapicula. HENDERSON, J. R. (1885) Diagnoses of the new Etymology: The Latin albus (white) plus species of Galatheidea collected during the apiculus (tip) refers to the white tips of "Challenger" Expedition. Ann. Mag. Nat. Hist. supraocular spines. (5)16: 407-421. HENDERSON, J. R. (1888) Report on the Anomura Acknowledgements: We thank Mr. Tin- collected by H. M. S. Challenger during the years yam Chan of National Taiwan College of 1873-76. Rept.Sci Res. Voy. H. M. S. Challenger, Zool. TJ: i-vi, 1-221, pis. 1-21. Marine Science and Technology, Keelung, for ZARIQUIEY ALVAREZ, R. (1952) Estudio de las making the interesting specimen available for especies Europeas del gen. Munida Leach 1818. study. —Eos, Rev. Espan. Entomol. 28: 143-231.

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