Orr and Matarese: Revison of the genus Lepidopsetta Gill, 1862 



571 



Etymology 



Tlie species name mochigarei is 

 derived from the Japanese, meaning 

 "rice-cake flounder" (Snyder, 1911 ), 

 probably a reference to the bright 

 white blind side similar to white 

 rice-cake common in Japan.'- 



Comments 



Masutomi and Hamada (1966) 

 described a fossil ofL. mochigarei. 

 It was subsequently described as 

 the extinct Chibapsetta dolichu- 

 rostyli by Sakamoto and Uyeno 

 (1988). 



Because early life history ma- 

 terial was not available for exam- 

 ination, descriptions were based 

 on the available literature (Yusa, 

 1957, 1958; Pertseva-Ostroumova, 

 1961; Okiyama and Takahashi, 

 1976; Okiyama, 1988). Several 

 potentially important characters 



could not be gleaned from the available sources: an ante- 

 rior pigment spot along the dorsal midline, important in 

 distinguishing L. bilineata from L. polyxystra n. sp. (Figs. 

 17C, 17D). is not present in preflexion larvae (Figs. 20A 

 and 20B). Because the sources were different, we needed 

 verification that these figures constitute a series. Although 

 present, the extent of the postanal ventral melanophores, 

 important in distinguishing Lepidopsetta from Psettich- 

 thys in particular as well as from other pleuronectids, is 

 not known. Additional data for morphological characters 

 were also needed for all developmental stages. Larvae of 

 L. mochigarei appear more similar to those of L. bilineata 

 than L. polyxystra n. sp., but they are not sympatric with 

 L. bilineata. Based on the present descriptions, larvae of L. 

 mochigarei can be distinguished from those of L. polyxys- 

 tra n. sp. by the distinctive vertically aligned dorsal mid- 

 line and finfold pigment. 



Lepidopsetta polyxystra n. sp. 



Northern rock sole 



Figs. 1-5, 8, 11, 13, 21-24; Tables 2-11, 13-14 



Lepidopsetta bilineata var. iimbi'osa Jordan and Ever- 



mann, 1898:2643 (in part. Fig. 928). 

 Lepidopsetta bilineata bilineata Taranetz. 1937:144 (in 



part, new combination, keys). 



Holotype 



UW 014826, 1( 169.7 mm), Alaska, Aleutian Is., Amchitka 

 I., Constantine Harbor, 19-42 m, 19 August 1955. 



'-Amaoka.K. 1997. Personal commun. Laboratory of Marine 

 ZoologT.', Faculty of Fisheries, Hokkaido University, Hakodate, 

 Hokkaido. Japan. 



Material examined 



A total of 843 adults and juveniles, including the holotype 

 listed above, was examined. Sixty larvae were examined. 



Paratypes 



Adults 219 specimens, 26-427.5 mm. Okhotsk Sea: UW 

 042341 ( orig. KIE 1 147 ), 2i 105.5-109.5 mm ), western Kam- 

 chatka, 51°57'N, 156°25'E; UW 042342 long. KIE 1149i, 

 3( 144.5-195 mm), western Kamchatka, 52°02'N, 155°58'E, 



6 June 1992; UW 042343 (orig. KIE 1151), 10(186-247 

 mm), 52°29'N, 153°40'E, 24 June 1992; KIE 1148, 1(89.5 

 mm), 51°43'N, 156°04'E, 5 June 1992; Southeast Kam- 

 chatka: CAS-SU 122549, 1( 112.3 mm), Kamchatka, off Pet- 

 ropavlovsk, 18 June 1906; Bering Sea: KIE 1415, 1(289.5 

 mm), Bering I., SW of Cape Monati, 54°37'N, 166°3rE, 

 27 April 1996; KIE 1417, 1(258.5 mm), Bering I., SW of 

 Cape Monati, 54°39'N. 166°29'E, 8 May 1996; KIE 1414, 

 1(260.5 mm), SW of Cape Monati, 54°4b'N, 166°29'E; KIE 

 1268, 1(338.6 mm), NW of Bering I., 55°34'N, 164°55'E, 



7 January 1994; KIE 1418, 1(289 mm). Bering I., SE of 

 Cape Monati, 54.6667°N, 166.8333°E, 9 May 1996; KIE 

 1416, 1(261 mm), Kamchatka, SW of Cape Northwestern, 

 55.2833°N, 165.5333°E, 4 May 1996; KIE 1150, 1(238.5 

 mm), Kamchatka, 56.2333°N, 154.3°E, 18 June 1992; ABL 

 93-37, 1( 193 mm), St. Paul I., Pribilof Is.; ABL 60-15, 1(265 

 mm), N of Pribilof Is., 58°33'N, 170°12'W, 17 July 1960; 

 UW 041694, 3(150-177), Aleutian Is., NE of Umnak I., 

 53.44°N, 168.4944°W; SIO 94-164, 9(103-190 mm), Aleu- 

 tian Is., off Unalaska I., 54°15.1'N, 165°57.6'W. 4 June 

 94; UW 041199, 1(267 mm), 60.6667°N, 169.65°W, 16 July 

 1979; UW 041697, 1(245 mm), Bering Sea, N of Unimak I., 

 55.0213°N, 164.6009°W; CAS 45562, 1(240.8 mm), WNW 

 of Pribilof Is., NE end of Zhenchug Canyon, 58°15.8667'N, 



