Report on Crassispirinae Morrison, 1966 (Mollusca: Neogastropoda: Turridae) from the China Seas Author Li, Bao Quan Author Kilburn, Richard N. Author Li, Xin Zheng text Journal of Natural History 2010 2010-02-23 44 11 - 12 699 740 http://dx.doi.org/10.1080/00222930903470086 journal article 10.1080/00222930903470086 1464-5262 5207387 Ptychobela flavidula (auctt non Lamarck, 1822 ) ( Figure 4F ) Material examined Yellow Sea. Three specimens, CN 40-12 , 36°45′ N , 122°15′ E , silty clay, 20 m , AT, 29 October 1958 ; 1 spm, CN H102 B-12, 36°00′ N , 121°00′ E , sandy mud and gravel, 35 m , B. T ., 24 April 1959 ; 2 spms, CN Y275 B-16, 36°30′ N , 122°00′ E , silty clay, 24 m , AT, 12 July 1959 . ECS. Twenty-eight specimens, CN V311 A-5, 32°00′ N , 122°30′ E , coarse sand and shell debris, 25 m , AT, 24 October 1959 ; 36 spms, VN C50B-27, 32°30′ N , 122°15′ E , fine sand, 27 m , AT, 22 October 1959 ; 3 spms, CN 222-40 , 31°30′ N , 123°00′ E , silt, 59 m , BT, 4 February 1959 ; 10 spms, CN F48 B-10, 30°00′ N , 120°45′ E , silt, 42 m , AT, 8 December 1959 . Beibu Gulf . One specimen, CN X152 B-17, 19°00′ N , 106°30′ E , 40 m , sand, AT, 26 October 1960 ; 1 spms, CN X172 B-21, 20°00′ N , 108°30′ E , fine sandy mud and slit, 62 m , AT, 21 January 1962 ; 1 spm, CN X192 B-33, 18°30′ N , 106°15′ E , sandy mud and shell debris, 28 m , AT, 11 April 1962 ; 1 spm, CN X192 , 18°30′ N , 106°15′ E , shell debris and sand, 20 m , AT, 11 April 1962 . SCS. Three specimens, CN K81 B-17, 21°15′ N , 114°00′ E , sand, 52 m , AT, 18 October 1959 ; 1 spm, CN K104 B-59, 20°30′ N , 112°00′ E , sandy mud, 65 m , AT, 28 October 1959 ; 1 spm, CN K102 B-18, 19°30′ N , 112°00′ E , muddy sand, 122 m , AT, 28 October 1959 ; 1 spm, CN K13 B-86, 21°30′ N , 111°30′ E , muddy coarse sand, 39.5 m, AT, 16 February 1960 ; 1 spm, CN S175 B-48, 23°30′ N , 117°30′ E , fine sand, 34 m , AT, 4 January 1960 ; 1 spm, CN K152 B-32, 20°00′ N , 112°30′ E , muddy sand, 101 m , AT, 6 April 1960 ; 1 spm, CN Q203 B-4, 21°24′ N , 109°00′ E , muddy sand, 11 m , AT, 22 April 1960 ; 1 spm, CN X7 AB-20, 19°00′ N , 105°45′ E , muddy sand, 128 m , AT, 11 February 1960 ; 1 spm, CN N15 B-84, 18°15′ N , 108°45′ E , coarse sand, 38 m , AT, 12 March 1960 ; 1 spm, CN K280 B-16, 18°30′ N , 106°30′ E , sand, 40 m , AT, 26 October 1960 . Measurements See Table 1 . Distribution Yellow Sea, ECS and SCS, Beibu Gulf , Nansha Islands. Remarks This and several similar species have been commonly misidentified as Pleurotoma flavidula Lamarck, 1822 ( 1822: 92 , type loc.: Red Sea), a species only briefly described by its author, without figures or figure references. However, the lectotype of that species in the MHNG (which according to Dr Yves Finet is accompanied by a label in Lamarck’s own handwriting) shows little resemblance to P. flavidula auctt . It has a short, broad siphonal canal and a wide, weakly concave subsutural region (see Figure 4G ), and appears close to Ptychobela concolor ( Smith, 1877 ) ( syntype see Figure 6A ), a rare species apparently known only from Indonesia . Previous misidentifications were probably initiated by early authors following Kiener (1840: 30 , pl. 6, fig. 2), who despite having access to Lamarck’s holotype (“Coll. Mass. et Mus.”), illustrated as this species a shell with a long, tapering siphonal canal, very different to the holotype of P. flavidula . Figure 6. (A) Syntype of Pleurotoma ( Drillia ) concolor Smith, 1877 , BMNH 1964227, Moluccas; 42.1 × 11.2 mm; (B) Ptychobela suturalis (Hainan Island); (C, D) Ptychobela resticula sp. nov. (holotype, SCS, CN S208B-42, 83 m, 41.5 × 14.3 m); (E) Ptychobela vexillium (SCS, CN N31B-13). Pleurotoma ( Drillia ) pseudoprincipalis Yokoyama, 1920 , from the Pleistocene of Japan , sometimes cited as a synonym of P. flavidula , has a well-developed subsutural cord which not only distinguishes the two species at a glance, but indicates that P. ( D. ) pseudoprincipalis might be an Inquisitor . References to figures of Pleurotoma flavidula of authors are not given here, as there appear to be several (if not many) similar but undescribed species belonging to this complex. A new name is not proposed because an in-depth study of the speciescomplex is clearly required. The present specimens from China show great variation in shell outline, number of axial ribs, spiral ridges and proportions (see Table 1 ). This species is abundant in the Yellow Sea, ECS and SCS.