Chlorotocus crassicornis (A. Costa, 1871)

Li, Xinzheng & Komai, Tomoyuki, 2003, Pandaloid Shrimps From The Northern South China Sea, With Description Of A New Species Of Plesionika (Crustacea: Decapoda: Caridea), Raffles Bulletin of Zoology 51 (2), pp. 257-275 : 259

Chlorotocus crassicornis ( Costa, 1871)

Pandalus crassicornis Costa, 1871: 89, 90, pl. 2, fig. 2 [type locality: Gulf of Napoli ] .

Chlorotocus crassicornis – Sivertsen & Holthuis, 1956: 39, figs. 28, 29, pl. 3, fig. 3; Crosnier & Forest, 1973: 184, figs. 58-60; Chace, 1985: 12, figs. 7, 8; Hayashi, 1986: 116, 117, 267, fig. 73; Liu & Zhong, 1994: 560; Takeda & Hanamura, 1994: 20.

Chlorotocus crassicornis var. andamanensis Alcock & Anderson, 1899: 284 [type locality: Andaman Sea].

Chlorotocus gracilipes A. Milne Edwards, 1882: 14 [type locality: Alboran Sea off Mediterranean coast of Morocco].

Material examined. – 3 females (cl 9.4-10.0 mm) ( IOCAS), CN L43 B-4, 18 30’N, 111 30’E, 182 m, sandy mud, AT, coll. X. Ma, 11 Apr.1959 ; 1 female (cl 10.1 mm), 1 ovig. female (cl 11.4 mm) ( IOCAS), CN K30 B-33B, 20 00’N, 112 30’E, 99 m, sand, AT, coll. F. Sun, 18 Apr.1959 ; 2 ovig. females (cl 10.3, 11.0 mm) ( IOCAS), CN L58 B-5B, 19 30’N, 112 00’E, 120 m, sand, AT, coll. Y. Wang, 20 Apr.1959 ; 1 female (cl 9.7 mm), 1 ovig. female (cl 10.3 mm, 2 specimens (cl 6.6, 7.2, abdomens lost) ( IOCAS), CN K33 B-53, 19 30’N, 113 00’E, 180 m, muddy sand, AT, coll. F. Sun, 21 Apr.1959 ; 1 ovig. female (cl 10.2 mm) ( IOCAS), CN K45 B-54, 20 30’N, 113 30’E, 89 m, muddy sand, AT, coll. F. Sun, 25 Apr.1959 ; 1 female (cl 11.1 mm) ( IOCAS), CN K46B2-21 , 20 00’N, 113 30’E, 140 m, sand, AT, coll. F. Sun, 25 Apr.1959 ; 2 females (cl 6.4, 11.4 mm) ( IOCAS), CN K55 B-19, 19 30’N, 112 30’E, 156 m, shells and sand, AT, coll. Y. Wang and F. Sun, 5 Jul.1959 ; 2 specimens (damaged) ( IOCAS), CN SIII19 B-7, 21 30’N, 115 30’E, 115 m, sandy mud, AT, coll. W. Zhang, 14 Jul.1959 ; 1 female (cl 9.3 mm), 2 ovig. females (cl 8.3-9.4 mm) ( IOCAS), 1 ovig. female ( ZRC), CN R39 A-5, 17 00’N, 109 30’E, 157 m, sandy mud, AT, coll. Z. Fan, 15 Jul.1959 ; 2 ovig. females (cl 10.7, 10.8 mm) ( IOCAS), CN SIII28 B-43B, 21 45’N, 116 00’E, 103 m, sand, AT, coll. Weiquan Zhang, 15 Jul.1959 ; 1 female (cl 11.9 mm) ( IOCAS), CN N90 B-14, 19 30’N, 111 30’E, 102 m, sand, AT, coll. H. Li, 19 Oct.1959 ; 2 females (cl 10.2, 12.2 mm) ( IOCAS), CN K88-55 , 20 00’N, 113 00’E, 128 m, sand, AT, coll. Y. Wang, 20 Oct.1959 ; 1 male (cl 10.8 mm) ( IOCAS), CN K102 B-60, 19 30’N, 112 00’E, 122 m depth, muddy sand, AT, coll. F. Xu, 28 Oct.1959 ; 4 females (cl 7.3-10.6 mm), CN K84B2-24 , 20 00’N, 113 30’E, 180 m, muddy sand, AT, coll. J. Liu, 20 Nov.1959 ; 1 ovig. female (cl 11.1 mm) ( IOCAS), CN K123 B-71, 19 30’N, 112 30’E, 174 m, sandy mud, AT, coll. S. Shen, 8 Feb.1960 ; 14 females (cl 9.3-15.8 mm, aver. 12.0 mm), 2 ovig. females (cl 13.9, 21.1 mm) ( IOCAS) , 1 female ( ZRC), CN K122 B-39, 19 00’N, 112 30’E, 300 m, sand, AT, coll. S. Shen, 8 Feb.1960 ; 3 specimens (damaged) ( IOCAS), CN N115 B-7, 18 30’N, 111 30’E, 220 m, muddy sand, AT, coll. J. Liu, 8 Feb.1960 ; 1 female (cl 10 mm) ( IOCAS), CN K148 B-16B, 19 30’N, 112 00’E, 124 m depth, sandy mud, AT, coll. Z. Tang, 4 Apr.1960 ; 2 ovig. females (cl 13.8, 16.2 mm) ( IOCAS), CN K150 B-27, 19 00’N, 112 30’E, 290 m, muddy sand, AT, coll. Tang, 6 Apr.1960 ; 1 female (cl 10.7 mm) ( IOCAS), CN N172 B-22, 19 00’N, 111 30’E, 162 m, sandy mud, AT, coll. Wang, 7 Apr.1960 ; 1 female (cl 9.3 mm) ( IOCAS), CN S219 B-2B, 21 30’N, 115 30’E, 115 m, muddy sand, AT, coll. J. Qu, 13 Apr.1960 .

Distribution. – South and East China seas, Africa, Andaman Sea, Indonesia, Philippines, Korea Strait, eastern Atlantic and Mediterranean; at depths of 3- 597 m.

Remarks. – Crosnier & Forest (1973) discussed the uncertain composition of Chlorotocus . They recognized C. crassicornis and C. novaezealandiae ( Borradaile, 1916) are valid. They believed that the Japanese specimen doubtfully assigned to Chlorotorus [sic] incertus by Balss (1914) probably represents a distinct, otherwise undescribed species. Our specimens are identified as C. crassicornis following Chace (1985).

Crosnier & Forest (1973) determined by direct comparison that a proportionally shorter rostrum distinguishes C. novaezealandiae from C. crassicornis . However, we have found that the proportional length of the rostrum is considerably variable in our specimens without correlation with size or sex, and that it is not reliable in distinguishing the two taxa. A thorough revision is needed to clarify the identities of these two taxa.