Latreutes planirostris (De Haan, 1844)

Xu, Peng & Li, Xin-Zheng, 2015, Report on the Hippolytidae Bate (sensu lato) from China seas, Zoological Systematics 40 (2), pp. 107-165 : 115-117

Latreutes planirostris (De Haan, 1844) ( Fig. 4 )

Cyclorhynchus planirostris de Haan, 1844: 175 , tab. 45, fig. 7. Type locality: Japanese coast.

Rhynchocyclus planirostris Miers, 1879: 55 .

Latreutes planirostris Ortmann, 1890: 505 , Tab. 37, figs. 4.

Material examined. MBM129833 , 3 ♂ (cl 1.32–1.95 mm), 1 ♀ (cl 1.97 mm), Shandong, Qingdao, Shazikou , 1957-7-17, no.57-517, coll. En-Ze Yang ; MBM129834 , 11 ♂ (cl 2.16–3.73mm), 17 ovig. ♀ (cl 2.78–4.39mm), Shandong, Qingdao , 1957-5-18, coll. Feng-Xuan Zhang ; MBM129835 , 1 ovig. ♀ (cl 5.07 mm), Yellow Sea , 1992-9-10, st.3305, 48m, mudy sand, AT, no. B-21, coll. Feng-Shan Xu ; MBM129836 , 1 ♂ (cl 3.16 mm), Shandong, Qingdao, Hongshiya , 1981-3-7, National Ocean Survey, coll. Xian-Qiu Ren ; MBM057775 , 1 ♂ (cl 2.53 mm), Northern part of Yellow Sea , 1958-10-13, st.2048, 50 m, hard clay, no.13-18, coll. Yu-Heng Cui ; MBM057633 , 1 ♀ (cl 2.76 mm), Bohai Gulf , 1959-7-20, st.1031, 22.6 m, brown mud, AT, no. H243B-9, coll. Mu Chen ; MBM057634 , 1 ♂ (cl 3.39 mm), Bohai Gulf , 1959-7-27, st.1008, 18.7 m, mudy sand and gravel, AT, no. H326B-7 ; MBM129837 , 1 ♀ (cl 2.78 mm), Yellow Sea , 1959-10-24, st.4031, 25m, brown sand and gravel, AT, no . V311 B-34 ; MBM057637 , 1 ♀ (cl 4.16 mm), Bohai Gulf , 1959-10-31, st.1017, 18 m, sand, AT, no. H335B-12 ; MBM129838 , 1 ♂ (cl 4.43 mm), 1958-4-8, st. P102 11.8 m, mud, BT, no. VXIV57B-11 ; MBM129839 , 1 ♂ (cl 2.23 mm), 1 ovig. ♀ (cl 3.87 mm), Shandong, Qingdao, Shazikou , 1965-5-4, coll. Xiu-Bin Fang ; MBM129840 , 7 ♂ (cl 2.73–3.91 mm), 4 ♀ (cl 3.26–4.32 mm), Shandong, Qingdao, Shilaoren , 1956-7-10, no.56-613, coll. Jie-Shan Xu ; MBM129841 , 1 ovig. ♀ (cl 4.16 mm), Shandong, Qingdao , Jiaozhou Bay, 1964-8-2, st. K018, 35.8 m, gravel, mud and sand, AT, no. M118B-5 ; MBM129842 , 3 ♂ (cl 2.24–2.79 mm), Shandong, Qingdao, Shazikou , 1993-3-23, no. S93C-8, coll. Yong-Liang Wang ; MBM129843 , 1 ovig. ♀ (cl 4.03 mm), Shandong, Qingdao , Jiaozhou Bay, 1964-8-14, st. K038, 32m, sand and mud, AT, no. M138B-4 ; MBM129845 , 17 ♂ (cl 2.09–2.76 mm), 1 ovig. ♀ (cl 3.70 mm), coll. Rui-Yu Liu ; MBM129846 , 5 ♂ (cl 1.46–2.67 mm), 1957-8-8, st. P704, 20 m, no. VIV20B-5, coll. Rui-Yu Liu ; MBM129847 , 1 ♂ (cl 2.63 mm), Yellow Sea , 1957-11-16, st. Y704, 50.5 m, shell and stone, BT, no. VXI26B-25, coll. Rui-Yu Liu ; MBM129849 , 1 ovig. ♀ (cl 3.18 mm), Shandong, Qingdao, Yin Island , 1954-6-9 ; MBM129853 , 1 ♂ (cl 2.57 mm), 1 ovig. ♀ (cl 3.06 mm) ,

© Zoological Systematics, 40 (2): 107–165 East China Sea, 1976-9-19, st. II-3, 60 m, mudy sand, AT, no. V542 B-28, coll. Zhi-Can Tang & Bao-Lin Zhang ; MBM129854 , 1 ♂ (cl 1.86 mm), 1 ovig. ♀ (cl 2.13 mm), Shandong, Qingdao, Xuejia Island , coll. Zhen-Gang Fan & Xiu-Bin Fang ; MBM129855 , 1 ovig. ♀ (cl 4.03 mm), 1957-6-18 ; MBM129856 , 1 ovig. ♀ (cl 2.76 mm), Shandong, Qingdao , Jiaozhou Bay, 1964-8-2, st. K09, 45 m, sandy mud and gravel, no. M109B-4 ; MBM129857 , 1 ovig. ♀ (cl 4.87 mm), Yellow Sea , 1992-5-27, st.3401, 19 m, fine sand, AT, no. B-13K, coll. Feng-Shan Xu ; MBM129860 , 2 ovig. ♀ (cl 4.34, 4.73 mm), Yellow Sea , 1992-6-2, st.3203, 36 m, sand, AT, no. B-7, coll. Feng-Shan Xu ; MBM129861 , 3 ♂ (cl 1.87–2.63 mm), Shandong, Qingdao, Xiaoqing Island , 1955-10-24, coll. Jie-Shan Xu ; MBM129863 , 23 ♂ (cl 2.19–4.08 mm), 2 ♀ (cl 4.37, 4.51 mm), market of Xincun , 1951-3-24 ; MBM129865 , 10 ♂ (cl 1.13–2.89 mm), 1 ovig. ♀ (cl 2.63 mm), Shandong, Haiyang, Fengcheng , 1981-6-17, no.81S-2L, coll. Shao-Wu Wang ; MBM129866 , 7 ♂ (cl 2.26–2.91 mm), 3 ♀ (cl 2.14–3.80 mm), Shandong, Qingdao, Fishing Farm , 1955-11-18, no.55-1275, coll. Feng-Xuan Zhang ; MBM129868 , 5 ♂ (cl 2.51–3.15 mm), 2 ♀ (cl 3.01, 3.07 mm), Shandong, Longkou, Furong Island , 1956-2-12 ; MBM129869 , 2 ♂ (cl 2.21, 2.34 mm), East China Sea , 1976-9-19, st. II-5, 64 m, mudy sand, AT, no . V540 B-49, coll. Zhi-Can Tang & Bao-Lin Zhang ; MBM129870 , 1 ♀ (cl 3.49 mm), Liaoning, Dalian, Changxing Island , 1952-10-12, no.52-0842 ; MBM129871 , 21 ♂ (cl 2.15–4.16 mm), Shandong, Qingdao, Yin Island , 1955-3-26, no.55-01082 ; MBM129872 , 1 ♂ (cl 1.83 mm), East China Sea , 1975-10-8, st. G-2, 55 m, Fine sand, AT, no . V463 B-30, coll. Zhi-Can Tang & Jie-Shan Xu ; MBM129875 , 4 ♂ (cl 2.04–2.95 mm), 2 ♀ (cl 3.77, 4.13 mm), 1958-10-23, st.1098, 55 m, gravel and shell, BT, no.64-8YP, coll. Zhi-Can Tang ; MBM129876 , 9 ♂ (cl 2.88–3.76 mm), 6 ♀ (cl 3.53–3.87 mm), 2 ovig. ♀ (cl 3.63, 3.81 mm), Fujian, Xiamen , 1957-3-28, no.57F-253, coll. Hui-Lian Chen ; MBM129877 , 51 ♂ (cl 2.21–4.35 mm), Shandong, Qingdao, Dagong Island , 1954-3-31, no.54-0259 ; MBM129879 , 1 ♀ (cl 4.23 mm), 1992-5-30, st.3303, mud, AT, no. B-10, coll. Feng-Shan Xu ; MBM129880 , 5 ♂ (cl 2.79–3.51 mm), 1958-4-2, st. P904, 13.3 m, mud, no. VXIV6B-14 ; MBM129882 , 1 ♂ (cl 3.27 mm), Shandong, Qingdao, Cangkou , 1955-3-11, no.55-01057 ; MBM129884 , 18 ♂ (cl 1.91–2.53mm), 1 ♀ (cl 3.03 mm) ; MBM129885 , 1 ♂ (cl 3.01 mm), Shandong, Qingdao, Hongshiya , 1981-3-7, coll. Xian-Qiu Ren ; MBM129886 , 1 ♀ (cl 4.49 mm), Shandong, Rongcheng, Longxu Island , 1951-5-6, no.51-0425 ; MBM129887 , 1 ♂ (cl 3.06 mm), Shandong, Qingdao, Shazikou , 1963-12-3, no.63-S0075, coll. Zhen-Gang Fang, Mu Chen, Jie-Shan Xu & Xiu-Bin Fang ; MBM129888 , 43 ♂ (cl 2.13–3.94 mm), Shandong, Qingdao, Shazikou , 1957-2-5, no.57-102, coll. Feng-Xuan Zhang & En-Ze Yang ; MBM129889 , 32 ♂ (cl 2.31–3.59 mm), 9 ♀ (cl 2.76–3.62 mm), Shandong, Qingdao, Zhan Bridge , 1956-11-16, no.56-905 ; MBM129890 , 3 ♂ (cl 2.59–3.65 mm), Shandong, Qingdao, Shazikou , 1957-12-24, no.57-878 ; MBM129892 , 1 ♀ (cl 3.42 mm), Shandong, Yantai , 1953-4-7 ; MBM129893 , 1 ♂ (cl 2.12 mm), Shandong, Qingdao, Hongshiya , 1981-5-7, st.3, no.6 .

Description. Rostrum similar to Latreutes anoplonyx , present arrow-shape in lateral view; much narrower and longer in male than in female. In female, rostrum slightly shorter than carapace; reaching distal margin of antennal scale; 2.0–2.5 times as long as wide; distal half of dorsal margin descending. In male, rostrum 1.2–1.5 times as long as carapace, overreaching distal margin of antennal scale, 3.0–4.0 times as long as wide; dorsal margin straight. Number of rostral teeth greatly changeable; dorsal margin with 7–15 teeth; ventral margin with 6–11 teeth; most teeth of dorsal and ventral margin locating on distal half of rostrum. Carapace with conspicuous verruca on median part posterior to big tooth on gastric region; antennal spine present and branchiostegal margin denticulate with 8–11 spinules.

Back of second and third somite with longitudinal ridges; sixth somite 0.5–0.7 times as long as telson. Antennular peduncle short, similar to Latreutes anoplonyx . Third maxilliped not reaching midpoint of antennal scale; ultimate segment with 8–10 corneous spines distally. First 4 pairs of pereopods with epipods. First and second pereopods similar to Latreutes anoplonyx . Second pereopod overreaching midpoint of antennal scale; third pereopod reaching distal margin of

© Zoological Systematics, 40 (2): 107–165 antennal scale. Last 3 pairs of pereopods with biunguiculate dactylus, which flexor margin bearing 4 or 5 spinules; merus each with 1 distolateral spine.

Coloration in life. Body brown, black and white; color often changeswith surrounding environment.

Distribution. China seas; Sea of Japan; living in sandy or muddy bottoms of shallow water, like attaching to other objects; 5– 110 m.

Figures

Fig. 4. Latreutes planirostris (De Haan, 1844). Carapace, lateral view. Scale bar=1mm.