Tokyo 180, Japan. Abstract. P. intermedia from. Japan Sea and California but is distinguished. of calceoli on antennae 1 and 2, and absence of an

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1 Beaufortia INSTITUTE OF TAXONOMIC ZOOLOGY (ZOOLOGICAL MUSEUM) UNIVERSITY OF AMSTERDAM Vol. 41, no. 12 October 22, 1990 A new species of the genuspontogeneia (Crustacea, Amphipoda) from Matsukawa-ura Inlet, Fukushima Prefecture, Japan Akira Hirayama Biological Laboratory, Department of Liberal Arts, Asia University, Sakai, Musashino-shi, Tokyo 180, Japan Abstract A new species of the genus Pontogeneia taken from shallow inlet of Fukushima a Prefecture, Japan, is described figured. The new species is closely related to P. intermedia from Japan Sea California but is distinguished from it by a slightly dilated propod of 1, the presence of calceoli on e 1 2, absence of an anterocephalic notch. INTRODUCTION them are observed, I report the present pontogeneid as a new species. During a survey of the diurnal rhythm of fish All the specimens including the types studied by the authors are deposited in the collectionof fry at Matsukawa-ura Inlet, Fukushima Prefecture, in February 1989, Dr. Y. Oozeki Asia University. his co-workers collected many amphipod specimens with plankton nets. About 20 species of gammarid amphipods were identified from these specimens. One of these species that ACKNOWLEDGEMENTS I wish to thank Dr. Yoshioki Oozeki of the belongs to the genuspontogeneia occurs most Tôhoku Regional Fisheries Research frequently is the subject of the present study. Laboratory for giving me the opportunity to About 25 species of the genus Portogeneia have examine the present material. Thanks are also been reported in the world (J. L. Barnard, 1952, 1964, 1969, 1979; K. H. Barnard, 1932; Boeck 1870; Bousfield, 1973; Bulytscheva, due to Prof. Yoshidide Suzuki of Asia University for providing me with working space facilities. 1957; Nagata, 1965; Oldevig, 1959; Rabindranath, 1972; Sars, 1895; Schellenberg, 1931; Shoemaker, 1933; Stebbing, 190 The pres- Pontogeneia stocki n. sp. (Figs. 1-3) ent species is closely related to P. intermedia Gur- Material examined. Holotype:, 9.6 mm, janova, 1938, which has been recorded from the Japan Sea (Gurjanova, 1951) California Q. L. Barnard, 1969, 1979). However, as several distinct differences in morphology between taken from Matsukawa-ura Inlet, Fukushima Prefecture, Japan; February 1989; coll. Yoshioki Oozeki his co-workers. Paratypes:, nos. 1-5 (6.0 mm, 5.9 mm, 83

2 Fig. Pontogeneia stocki sp. nov. Holotype, male, 9.6 mm. 7.1 mm, 6.8 mm, 5.7 mm); female, nos Antennae. Antenna 1 shorter than 2; (9.0 mm, 8.6 mm, 9.0 mm, 6.2 mm, 5.2 mm); relative length ratios of peduncular segments 1- collected with the holotype. Holotype a 3, 9:6:4; peduncular segments 2-3 ornamented part of paratype no. 6 (female) are mounted on with calceoli ventrally; accessory flagellum glass absent. Antenna 2: gl cone of peduncular slides in a gum-chloral medium. Collection number: Asia-4. segment 2 broad, extending to mid-point of peduncular segment 3; peduncular segments 4- Description of the male holotype (9.6 mm) Body. Head: rostral projection small; 5 ornamented with calceoli dorsally. Mouthparts. Lower lip: inner plate coalescent with outer plate, distinct. Maxilla 1: inner plate anterocephalic lobes rectangular, lacking ven- with 6 plumose setae, apical seta stoutest; outer tral notch; anteroventral angle blunt, with 3 minute setae. Gills present on pereonites 2-7. Pleonites 1-3 not extending backward dorsally; pleonal epimeron 2 lacking posterodistal tooth; pleonal epimeron 3 not conspicuously expan- plate with 8 comb-like teeth; palp biarticulate, distal segment with 7 tooth-like 5 spines, stiff marginal setae submarginal row of 10 setae on inner distal region. Maxilla 2: inner plate with 5 plumose setae on proximal half of inner ding backward, lacking posterodistal tooth. margin. Mibles: incisor ornamentedwith 6 84

or 7 blunt teeth, lacinia mobilis bifid on right relatively more elongate than those of male; mible, with 5 teeth on left mible, following 4 accessory blades; palp triarticulate, basal carpus less

3 or 7 blunt teeth, lacinia mobilis bifid on right relatively more elongate than those of male; mible, with 5 teeth on left mible, following 4 accessory blades; palp triarticulate, basal carpus less setose, not subtriangular; propod about 0.8 times as long as carpus, palm segment with 3 setae, penultimate segment not serrate. Gnathopod 2: propod relatively longer slightly exped medially, densely setose on than that of male; more slender than that exping margin. Maxilliped: inner plate of male; palm not serrate. with 2 conical teeth; outer plate with 8 tooth- Etymology. The specific name, stocki, is like spines on inner margin, with 5 stiff setae on dedicated to Dr. Jan Stock, the very famous outer margin. amphipodologist. Gnathopods. Gnathopod 1 : carpus subtriangular, propod about 2 times as long as carpus, slightly rounded posteriorly; palm oblique, serrate; dactyl not serrate on grasping margin. Gnathopod 2 similar to 1, REMARKS Morphologically the present species is closely related to Pontogeneia intermedia Gurjanova, 1938 propod more rounded. s 3-4. Homopodous. Relative ratios (J. L. Barnard, 1969, 1979; Gurjanova, 1951), collected from Japan Sea California, by of posterior lengths from basis to dactyl about sharing the following characters: 9:2:6:6:9:4, plumose setae present on posterior 1) rostral projection very small; 2) the number of facial margin of merus, carpus propod; propod of pereopod 3 with only one locking spine s s 5-6 homopodous except for coxae; posterior lobe of coxa 6 deeper than that of coxa 5, with 3 spines ventrally. plumose setae on the inner of maxillae plate 1-2 being 5 or 6; 3) relative length form of the carpus propod of s; 4) pleonal 3 epimeron not conspicuously exped backward, lacking a tooth on the hind angle; 5) 7 similar but longer than pereopod 6; depth of cleft in telson slightly longer than 1/2 basis more elongate than that of pereopod 6. of length of telson (J. L. Barnard, 1969, 1979) (in Gurjanova's cleft (1951), more than 2/3 of telson length). However, the present species is Pleopods. Pleopod 3 well developed; peduncule stout; rami multiarticulate, proximal segment short; swimming setae short. distinguished from P. intermedia by the following Uropods. Uropod 1: peduncle spinose on characters: 1) e 1 2 of male lacking lateral margin, 0 times as long as outer calceoli (in the present species, ornamented ramus; outer ramus about 0.7 times as long as inner ramus, apex bifid, armed with single inner ramus spine; bifid, with 2 apical spines, one elongate. Uropod 2 extending beyond with many calceoli); 2) anterocephalic notch distinct in (absent the present species) anteroventral angle acute (blunt in the present species); 3) propod of 1 almost telson; peduncle slightly shorter than half of straight posteriorly (slightly broadly length of outer ramus; outer ramus almost 0.7 times as long as inner ramus, with outer-apical exped in the present species) dactyl serrate on the grasping margin (smooth in the tooth 2 unequal apical spines; outer ramus apically bifid, with 2 unequal apical spines present species); 4) in the inner plate 2, facial plumose setae inserted on of maxilla the medial laterally; rami foliaceous, marginally spinose margin extending to near the group of apical setose; outer ramus slightly inner ramus. shorter than setae, although these setae in the present species inserted below the mid-point of medial margin. Telson. Subrectan guiar, cleft to 0.75 of length, without setae or spines, apically rounded. Description of female (paratype no. 6, 9.0 mm) Similar to male. Peduncle of e lacking calceoli. Gnathopod 1: basis carpus REFERENCES BARNARD, J. L., 195 Some Amphipoda from central California. WasmannJ. Biol., 10: Species, captured in benthic grab trawl samples. Pac. Nat., 4 (3):

4 86

5 87 Fig. pontogeneia stocki sp. nov., holotype (male, 9.6 mm) paratype no. 6 (female, 9.0 mm: D, E, O, O1, P P1). A: Head. B: C: D: 1 (para. E: 2 (para. F: Lower lip. G: Upper lip. H: Maxilla I: Maxilla J J1: Left mible. K: Right mible. L: Maxilliped. M M1: 1 palm. N N1: O O1: 1 palm (Para. P P1: 2 palm (Para. Q: Pleopod R R1: Uropod S S1: Uropod T: Uropod U: Telson.

6 7; E: 6. D: 5. C: 4. B: A: mm). 9.6 (male, holotype Pleonite nov., sp. stocki G: Pontogeneia Pleonite Fig. H: Pleonite F: 88

7 , GURJANOVA, E. F., 195 Bokoplavi morei SSSR i Gammaridean Amphipoda ofthe rocky intertidal of California: Monterely Bay of La Jolla. Bull. sopredel'nyx vod U.S. natl. Mus., 258: (Amphipoda-Gammaridea). Opred. po Faune SSSR, Izd. Zool. Inst. Akad. Nauk,, Littoral gammaridean Amphipoda from the 41: Gulf of California the Galapagos Isls. Smithson. Contrib. Zool., 271: NAGATA, K., Studies on marine gammaridean Amphipoda of the Seto Inl Sea. II. Publ. Seto BARNARD, K. H., 193 Amphipoda. Discovery Rept., 5: Mar. Biol. Lab., 13 (3): , pl. I. BOECK, A., Crustacea Amphipoda borealis et árctica. Forhl. Vidensk.-Selsk. Christiana, 1870: OLDEVIG, H., Arctic, Subarctic Scinavian amphipods in the collections of the Swedish Natural History Museum in Stockholm. Göteborgs K Vetensk. Vitterb-Samh. Hl. (Ser. B), 8 (2): 1- BOUSFIELD, E. L., 197 Shallow-water gammaridean Amphipoda of New Engl. Cornell Univ. Press, Ithaca, N.Y., 1-31 pp. BULYTSCHEVA, A. N., Amfipodi (Amphipoda) sebro-zapadmoi chasti Japonskoga Morei. Issledobaniya Dal'neboctochif Morej SSSR, 4: CHEVREUX, E., Crustacés amphipodes: Expédition Antarctique Française ( ) commée par le Dr. Jean Charcot. Sei. Nat. Doc. Sei.: , Diagnoses d'amphipodes nouveaux provenant des de la Princesse-Alice dans campagnes l'atlantique nord. Bull. Inst. Océanogr. Monaco, 122: 1-8., Amphipodes provenant des campagnes du 132, pis RABINDRANATH, P., 197 Studies on gammaridean Amphipoda (Crustacea) from India. Bull. Zool. Mus., Univ. Amsterdam, 2 (16): SARS, G. O., Amphipoda: An account of the Crustacea of Norway with short descriptions figures of all the species. Alb. Cammermeyers, Christiania Copenhagen, 1: 711 pp., 240 pis., 8 suppl. pis. SCHELLENBERG, A., 193 Gammariden und Caprelliden des Magellangebietes, Südgeorgiens und der Westantarktis. Zool. Res. Swed. Antarc. Exped., , 2 (6): 1-290, Taf. SHOEMAKER, C. R., 193 Two new genera six new species of Amphipoda from Tortugas. Carnegie Inst. Was. Publ., 435: er Prince Albert I, de Monaco. Résuit. Campagnes STEBBING, T. R. R., Amphipoda I: Gammaridea Sei. par le Prince Albert I er, Monaco, Fas., 90: 1- Das Tierreich, 21: , pis. I-XVI. DELLA VALLE, A., 189 Gammarini del Golfo di Napoli. Fauna und Flora des Golfes von Neapel und der Angrenzenden Meeres-Abschnitte. Monogr., 20: 1-948, 61 pis. Received: November 13, 1989 Institute of Taxonomic Zoology (Zoologisch Museum), University of Amsterdam, P.O. Box 4766, 1009 AT Amsterdam, the Netherls 89

THE GENUS PHOTIS (CRUSTACEA: AMPHIPODA) FROM THE TEXAS COAST WITH THE DESCRIPTION OF A NEW SPECIES, PHOTIS MELANICUS

THE GENUS PHOTIS (CRUSTACEA: AMPHIPODA) FROM THE TEXAS COAST WITH THE DESCRIPTION OF A NEW SPECIES, PHOTIS MELANICUS L. D. McKinney Texas A&M University at Galveston, Moody College of Marine Technology,