A species of dwarf goby closely allied to Pandaka lidwilli is described as a new species Pandaka trimaculata with a new Japanese name “mitsuboshigomahaze”.It was collected from the most southerly group of islands in Okinawa Prefecture, Japan, and Mindanao Island, the Philippines.The differences between the two species are the number of scales in longitudinal series and the pattern of spots on the ventral side.The genus Berowra is synonymized with Pandaka .
Pristipomoides multidens (Day), usually considered a synonym of P.typus Bleeker, is shown to be a valid species of lutjanid fish.Existence of yellow bands on snout and cheek, transverse vermiculations on interorbital region, wider suborbital width, stronger canines, and thicker 1st hemal spine characterize P.multidens from P.typus.
Descriptive and distributional inform .ation is presented on three Indochinese-Thai clupeid species referrable to the subfamily Pellonulinae: Clupeoides borneensis, Corica soborna and Clupeichthys goniognathus.Clupeoides borneensis and Corica soborna show a close affinity, and are distinctive from Clupeichthys goniognathus, most remarkably in the jaw structure and the manner of opening the mouth.In the study area, Corica soborna is apparently confined in estuarine freshwaters;Clupeoides borneensis occurs a little further upstream in the Mekong;Clupeichthys goniognathus has a wide range in the Mekong as far upstream as central Laos.
Since 1964 a great number of mesopelagic fishes has been collected from the western North Pacific Ocean by the R/V Tansei Maru and Hakuho Maru of the Ocean Research Institute, University of Tokyo.Based upon these materials, taxonomy and geographical distribution of marine hatchetfishes belonging to the genus Argyropelecus were studied.Four species, A.affinis Garman, A.hemigymnus Cocco, A.sladeni Regan, and A.aculeatus Valenciennes, which represent all species, hitherto reported from the investigated area were found in the present material. The four species are clearly distinguishable from each other by the combination of morphological characters such as body depth, relative position of photophores, vertebral counts, gillraker counts, dorsal and anal fin ray counts, and the shape of postabdominal spine.Yellow lens is observed only in the eyes of A.affinis. Shape of postabdominal spine changes in accordance with their growth in the four species.Maximum height of the dorsal blade, trunk height from the end of the dorsal fin base to the origin of the anal fin base, distance from the last abdominal photophore to the first pre-anal photophore, and distance from the last anal photophore to the subcaudal photophore change also with growth. A.hemigymnus and A.aculeatus abundantly occur around Japan.A.hemigymnus is widely distributed in the western North Pacific, whereas A.aculeatus is relatively restricted to the Kuroshio waters adjacent to japan.A.affinis and A.sladeni are relatively rare around Japan.A.affinis is rather abundant in the east and west of the western North Pacific Central Water, whereas A.sladeni is widely distributed in the western North Pacific.
Takagi (unpublished: 94) identified a goby collected in Amamioshima and Kikaijima, in Kagoshima Pref., Japan as Callogobius liolepis Koumans, and gave it a Japanese name“namerahaze”.Our study revealed that these specimens agree well with the holotype of Callogobius okinawae (Snyder), but neither with the syntypes of C.liolepis nor with the original figure of C.hasseltii (Bleeker).C.okinawae closely resembles C.hasseltii, and Tomiyama (1936: 84) and Koumans (1953: 98) regarded them conspecific.However, we found some characters are different between them (Table 1 and Figs.2 and 3).