Vossquilla kempi ( Schmitt, 1931 ), 2017

Vossquilla kempi ( Schmitt, 1931) n. comb.

( Fig. 2 View Figure 2 , 3B View Figure 3 )

Chloridella kempi Schmitt, 1931: 135–140 , 147, pl. 17 figs 6–9, pl. 18 figs. 10–11.

Squilla kempi . — Chopra, 1934: 31–35, figs. 3, 4. — Holthuis, 1941: 254. — Liu, 1949: 41, 42, fig.4a–b.

Squilla oratoria . — Komai, 1927: 315, fig.1B (southern form). — Gravier, 1937: 183. — Komai, 1938: 266 (southern form). — Dawydoff, 1952: 145. [Not Squilla oratoria De Haan, 1844 ]

Squilla oratoria var. perpensa . — Gravier, 1937: 185, fig. 7. — Dawydoff, 1952: 145. [Not Squilla oratoria var. perpensa Kemp, 1911 ].

Oratosquilla kempi . — Manning, 1971: 4. — Blumstein, 1974: 119. — Dong et al., 1983: 82, 92, pl. 2 fig. 2. — Manning, 1995: 25 [list], 220, 221, figs. 135, 136h–j. — Sun et al., 1998: 22, fig. 8. — Wang and Liu, 1998: 133, 137, 139. — Ahyong et al. 1999: 47–49, fig. 6e. — Moosa, 2000: 411, 446, tab. 1. — Ahyong, 2005: 197. — Mitsuhashi and Takeda, 2006: 110.

Type material. HOLOTYPE: USNM 61892 About USNM , female

(TL 120 mm), Amoy, China, coll. S.F. Light.

Other material examined. USNM 124774, female

(TL 113 mm), Amoy , China, coll. S.F. Light ; USNM 58744 About USNM , 1 male (TL 113 mm), Foochow , China, coll. C . R. Kellogg ; AM P99511 , 1 male (TL 112 mm), Kinmen, Taiwan Strait , 24°24’N 118°24’E GoogleMaps , 10–12 m, trawl, coll. R.Y. Lee , 26 June 2012; NTOU, 2 males (TL 94–107 mm), Kinmen, Taiwan Strait , 24°24’N 118°24’E GoogleMaps , 10–12 m, trawl, coll. R.Y. Lee , 26 June 2012; NTOU, 1 male (TL 28 mm), 2 damaged females (TL ~ 30–45 mm), Kinmen, Taiwan Strait , 24°24’N 118°24’E, intertidal, coll GoogleMaps . 25 June 2012; NTOU, 1 male (TL 104 mm), Pearl River estuary, Macau ; AM P99510 , 1 male (TL 56 mm), Pearl River estuary, Macau, 22°33.4’N 113°48.1’E, stn. 3, coll. K.H. Chu GoogleMaps , 13 March 1993; USNM 127443 About USNM , 1 female (TL 114 mm), Nagasaki, Kyushu , Japan, coll. J. B. Bernadon.

Description. Dorsal integument smooth, at most, weakly pitted.

Eye extending beyond midlength but not apex of antennular peduncle article 1; cornea strongly bilobed, set slightly obliquely on stalk; CI 308–500. Ophthalmic somite anterior margin rounded. Ocular scales truncate, separate.

Antennular peduncle length 0.84–0.97CL. Antennular somite dorsal processes trianguloid, directed anterolaterally, apices blunt. Antennal 2 scale length 0.52–0.63CL.

Rostral plate subtrapezoid, slightly wider than long; lateral margins carinate; apex truncate to rounded; dorsal surface smooth or with short median tubercle or carina. Carapace anterior width 0.47–0.51CL; anterolateral spines not extending beyond base of rostral plate; anterior bifurcation of median carina well-defined, about as long as distance between base of bifurcation and dorsal pit; posterior median projection obtuse.

Raptorial claw dactylus with 6 teeth; outer margin sinuous, with low proximal swelling. Propodus distal margin unarmed. Carpus dorsal carina irregular to weakly sinuous. Merus outer inferodistal angle blunt, obtuse, unarmed.

Mandibular palp 3-articulate. Maxillipeds 1–4 each with epipod. Maxilliped 5 basal article with small, ventrally directed tooth; ischium ventral margin evenly rounded, unarmed.

Pereopod 1–3 basal articles unarmed; endopod articles fused.

Thoracic somites 6–8 submedian carinae weakly divergent. Thoracic somite 5 lateral process anterior lobe spiniform, recurved anterolaterally; posterior lobe short, sharp. Thoracic somite 6 lateral process anterior lobe slender, width about half length, less than one-third width of posterior lobe; posterior lobe large, triangular. Thoracic somite 7 lateral process broadly triangular, anteriorly margin straight or with low blunt swelling. Thoracic somite 8 lateral process triangular, apex blunt; sternal keel rounded.

Male pleopod 1 endopod with petasma; posterior “endite” present; tube process curved, distinctly longer than hook process; hook process without apical spine.

Abdominal somites 1–5 submedian carinae subparallel to weakly divergent. Abdominal somite 6 with small ventrolateral spine anterior to uropodal articulation; sternum posterior margin unarmed. Abdominal carinae spined as follows: submedian 5–6, intermediate (3–4)5–6 (usually 4–6), lateral (2)3–6, marginal 1–5.

Telson about as long as wide to slightly wider than long; apices of intermediate teeth extending posteriorly to base of submedian teeth; prelateral lobe slightly shorter to slightly longer than margin of lateral tooth. Submedian, intermediate and lateral primary teeth each with smooth carina, that of lateral tooth extending anteriorly slightly beyond distal end of prelateral lobe.Marginal denticles rounded, submedian and intermediate denticles each with low dorsal tubercle or swelling; denticle formula: submedian 2–4, intermediate 6–8, lateral 1. Median carina interrupted proximally, with tubercle below posterior spine. Dorsolateral surface with rows of shallow pits; supplementary longitudinal carinae absent. Telson ventral surface with short postanal carina, extending posteriorly to about proximal one-fourth of distance to between anal pore and posterior margin; ventrolateral carina extending almost to base of lateral tooth.

Uropodal protopod terminating in 2 slender spines; lobe on outer margin of inner spine narrower than adjacent spine, proximal margin concave; inner margin of inner spine crenulate; minute tooth proximal to endopodal articulation.

Uropodal exopod proximal article with 7 or 8 movable spines on outer margin, distalmost spine reaching to proximal one-third of distal article; distal margin with 2 ventral spines, outer longer. Exopod distal article slightly longer than proximal article.

Colour in life. Light grey-brown dorsally, darker middorsally. Carinae and grooves of carapace, submedian carinae, intermediate carinae, and abdominal somite 6 lateral carinae dark red. Mid-posterior margin of carapace yellow orange. Abdominal somite 2 and 5 with transverse black-brown patch between intermediate carinae, that of somite 5 on posterior half. Telson with median carina and prelateral lobe dark red; primary teeth with white tips and dark green carinae; telson surface with dark, irregular grey-green band across central one-third; submedian denticles white; intermediate and lateral denticles dull yellow-green. Uropodal protopod with whitish base colouration and dark yellow-green carinae, terminal spines white; endopod with speckled yellow distal half; exopod with white movable spines, with deep blue patch on distal half of proximal article; exopod distal segment diffuse blue in mesial half, diffuse white-yellow on lateral half. Antennules with black speckling.Raptorial claw white overall; merus with black and pink speckling dorsally, yellow-green meral depression and pale orange ventral outer margin; carpus white with yellow spot proximally; propodus with yellow disto-extensor margin and diffuse brown speckling; dactylus white. Pereopods 1–3 translucent white, yellowish distally.

Size. Male (n = 6) TL 28–113 mm, female (n = 5) TL 30–120 mm. Sun et al. (1998) reported specimens to 149 mm.

Remarks. The series of V. kempi examined is largely consistent, with variation in abdominal spination that is largely size related. The intermediate carinae on abdominal somite 4 are unarmed in the smallest specimens (male TL 28, female TL 30 mm, NTOU), armed in all others. The prelateral lobes range from slightly shorter to slightly longer than the margins of the lateral teeth and the rostral plate may have a short median carina or dorsal tubercle, but is usually smooth dorsally; these variations appear unrelated to body size.

The dorsal carina of the raptorial claw carpus in V. kempi has been characterized as irregularly tuberculate as in O. oratoria (e.g., Manning, 1971; 1995), though the condition in V. kempi is better characterized as smooth or irregular, but not distinctly tuberculate; the condition varies allometrically, being smooth in the smallest specimens, becoming increasingly irregular with increasing body size. In Oratosquilla , the dorsal carina of the carpus of the raptorial claw is distinctly, albeit irregularly tuberculate in adults, and less pronounced in juveniles.

Distribution. Vietnam, China, Japan and for the first time from Taiwanese waters (Kinmen); intertidal to shallow subtidal depths.