【摘要】 <正> 1980年6—8月,东海水产研究所调查船“东方号”在东海大陆架斜坡及深沟区(水深200—1000米范围)进行资源调查时,采得若干种软骨鱼类标本,经鉴定确认其中有三新种,分别定名为:粗体光尾鲨Apristurus pinguis;东海施氏鳐Springeria donghaiensis;后鳍尖吻银鲛Harriotta opisthoptera,标本均存于本所鱼类标本陈列室。现将其特征分别记述如下。 1.粗体光尾鲨(新种)Apristurus pinguis sp. nov.(图1)更多还原

【Abstract】 Some specimens of Elasmobranchiate fishes were collected from deep waters of the East China Sea, at 26—31°N, 125—128°E, in depth of 200—1000m, by the research vessel "Dongfang" of the East China Sea Fisheries Institute, National Bureau of Fisheries of China, in June—August, 1980. Three species are considered as new to science. All the types are deposited in the East China Sea Fisheries Institute, National Bureau of Fisheries of China. 1. Apristurus pinguis sp. nov. (Family Scyliorhinidae) (Fig. 1) Diagnosis Body stout. Snout length in front of mouth about 1.2 times the distance between nostrils. Anal fin long, its rear tip nearly reaches origin of lower caudal lobe. Distance between origins of pectoral and pelvic fins greater than distance from tip of snout to origin of pectoral fin, but shorter than that from snout tip to end of pectoral base. A. pinguis is very much like A. japonicus Nakaya but differs in having distance between orbits about the length of snout in front of mouth; length of nostril about 1/2 the distance between nostrils; snout length in front of mouth about 1.2 times the distance between nostrils; the upper and lower labials about equal in length. Holotype No. SH80D-0312(♂) total length 556 mm. 2. Springeria donghaiensis sp. nov. (Family Anacanthobatidae) (Fig. 2) Diagnosis Disc about as long as broad. The end of snout with a short prolongation. Tail slender, its width at the axis of pelvics 0.6—0.7 times as great as eye diameter; its length from the middle of cloaca to its tip 0.8—1.2 times the distance from the middle of cloaca to the base of terminal prolongation of the snout. Tail brownish dorsally, pale ventrally, a series of small blackish spots laterally. S. donghaiensis differs from S. dubia Von Bonde et Swart in that the snout is not produced in filament; from S. folirostris Bigelow et Schroeder in that the snout is not enlarged like a leaf; from S. nanhaiensis Meng et Li in that tail slightly shorter than or about equal the length of disc, snout length in front of eye about 10—14 times that of the eye. It closely resembles S. melanosoma Chan from the South China Sea, but differs in having the maximum width of disc at posterior 2/5; the maximum anterior angle in front spiracles about 84—91°; the tail width at the axis of pelvics 0.6—0.7 times the eye diameter, its length slightly shorter than or about equal the length of disc. No. total length (mm) Holotype SH80D-0371 (♀) 325 Paratype SH80D-O012(♀) 308 SH80D-0013 (♀) 377 SH80D-0370 (♂) 320 SH80D-0372 (♀) 318 SH80D-0992 (♀) 440 3. Harriotta opisthoptera sp. nov. (Family Rhinochimaeridae) (Fig. 3) Diagnosis Snout long, narrow, triangular, flattened above and below. The dorsal spine triangular in cross section, with a row of serrations along each of its two posterior edges, situated directly over middle or posterior pectoral insertion. The ventrals inserted slightly posterior between anterior end of base of pectoral and origin of lower caudal lobe. Caudal lanceolate, tapering to a narrow tip like a slender whipshaped filament, its upper lobe very smooth in margin. No separate anal fin. Claspers rod-like, rather slender, unbranched, tip somewhat swollen. Jugular canal and oral canal arising separately from orbital, with a short interspace; angular (maxillary) canal joining suborbital about 2/7 of distance from front level of eye toward tip of snout. The difference between the two species of Harriotta at angular (maxillary) mucous canal loop pattern are consistent and striking as indicated in the illustrations. The angular mucous canal loop in H. opisthoptera is symmetrically bilobate at anterior end. The distance from origin of pectoral and pelvic 18—22% TL; pelvic and lower caudal fin 16—18% TL. The angular canal loop pattern closely resembling H. opisthoptera and Neoharriotta carri, but in H. opisthoptera anal fin absent. No. total length (mm) Holotype SH80D-0411 (♂) 738 Paratype SH80D-0410 (♀) 785 SH80D-0326(♂) 590 SH80D-0329 (♀) 870 SH80D-0391 (♂) 683 SH80D-0402 (♂) 635 SH80D-0404 (♀) 825更多还原