Eualus leptognathus (Stimpson, 1860)

Xu, Peng & Li, Xin-Zheng, 2015, Report on the Hippolytidae Bate (sensu lato) from China seas, Zoological Systematics 40 (2), pp. 107-165 : 142-143

publication ID

https://doi.org/ 10.11865/zs.20150201

publication LSID

lsid:zoobank.org:pub:EF4C535D-B77C-45E1-86BA-A3F7AA06ED18

persistent identifier

https://treatment.plazi.org/id/03AE8786-1A2A-FF8F-FF00-5C7B5064357B

treatment provided by

Felipe

scientific name

Eualus leptognathus (Stimpson, 1860)
status

 

Eualus leptognathus (Stimpson, 1860) ( Fig. 22 View Fig )

Hippolyte leptognatha Stimpson, 1860: 103 . Type locality: Hokkaido.

Spirontocaris japonica Yokoya, 1930: 273 , 533.

Spirontocaris leptognatha Yokoya, 1933: 26 .

Eualus leptognathus Holthuis, 1947: 11 , 43; Miyake & Hayashi, 1967: 258, fig. 5.

Material examined. MBM109912 View Materials , 1 ♂ (cl 2.34 mm), Shandong, Yantai, Kongtong Island , 1933-12-13 ; MBM109913 View Materials , 1 View Materials ovig. ♀ (cl 4.27 mm), Shandong, Qingdao, Zhonggang , 1955-2-27 ; MBM109915 View Materials , 3 View Materials ovig. ♀ (cl 4.04–4.33 mm), 2 ♂ (cl 3.22, 3.56 mm), Shandong, Qingdao, Guizhou Road , 1955-3-19 ; MBM109916 View Materials , 2 ♀ (cl 3.76, 4.19 mm), 3 ♂ (cl 3.71–4.05 mm), Shandong, Qingdao, Zhonggang , 1956-2-4, coll. Feng-Xuan Zhang ; MBM109917 View Materials , 3 ♂ (cl 2.15–3.01 mm), Shandong, Qingdao, Fish Farm , 1955-11-18, coll. Feng-Xuan Zhang ; MBM129738 View Materials , 1 View Materials ovig. ♀ (cl 3.94 mm), 5 ♀ (cl 4.07–4.35 mm), 3 ♂ (cl 3.43–3.62 mm), Shandong, Qingdao, Guizhou Road , 1955-3-19 ; MBM109921 View Materials , juvenile (cl

© Zoological Systematics, 40 (2): 107–165 0.76–0.91 mm), Shandong, Qingdao, Yumingzhui , 1955-9-20 ; MBM109922 View Materials , 2 ♂ (cl 3.37, 3.92 mm), Shandong, Yantai Port, Zhifu , 1954-5-18 ; MBM109923 View Materials , 1 ♀ (cl 3.92 mm), juvenile (cl 0.63–1.16 mm), Shandong, Qingdao, Zhonggang , 1955-7-14 .

Description. Rostrum longer than carapace, laterally compressed, apically upward; dorsal margin with 3–6 teeth on proximal half, and distal half of ventral margin armed with 2–5 teeth in front of foremost tooth on dorsal margin. Antennal spines acutely pointed, setting below obtuse suborbital angle and pterygostomian spine small but distinct.

Pleura of fourth somite unarmed posteriorly but that of fifth with small posteroventral tooth. Telson about 1.3 times as long as sixth abdominal somite, with 4 or 5 pairs of dorsal spines; posteriormargin of telson terminates in small acute tooth with 2 pairs of spines and one mesial pair of stiff setulose setae.

Eye rather large; stalk longer than cornea.

Stylocerite is sharp, reaching distal margin of antennular peduncle; 3 segments of antennular peduncle each with distinct spiniform distal tooth. Antennal scale broad, 5 times as long as wide, slightly overreaching apex of rostrum; lateral margin straight, distolateral tooth falling short of rounded distal margin of blade. Third maxilliped with exopod and epipod, reaching distal margin of antennal scale.

First to third pereopods with strap-like, terminally hooked epipods.

First pereopod stout and short, reaching distal margin of antennular peduncle. Second pereopod slender, reaching or overreaching distal margin of antennal scale. Biunguiculate dactylus of third pereopodarmed with 6 or 7 accessory spines along entire length of flexor margin; merus with 4–7 prominent lateral spines distally. Merus of fourth pereopod with 4 or 5 lateral spines distally; fifth pereopod reaching distal tip of stylocerite, merus with 3 or 4 distolateral spines.

Appendix interna of female expanded in distal part bearing many coupling hooks; appendix masculine of male large and short, being 1/3 length of appendix interna with truncated tip bearing eleven long hairs.

Coloration in life. Body generally translucent with some small brown spots; eggs are brown green.

Distribution. Northern China seas; Sea of Japan; shallow water or clear seaweed pond, like attaching to objects.

Kingdom

Animalia

Phylum

Arthropoda

Class

Malacostraca

Order

Decapoda

Family

Hippolytidae

Genus

Eualus

Loc

Eualus leptognathus (Stimpson, 1860)

Xu, Peng & Li, Xin-Zheng 2015
2015
Loc

Eualus leptognathus

Holthuis 1947: 11
1947
Loc

Spirontocaris leptognatha

Yokoya 1933: 26
1933
Loc

Spirontocaris japonica

Yokoya 1930: 273
1930
Loc

Hippolyte leptognatha

Stimpson 1860: 103
1860
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