Oratosquillina inornata

Oratosquilla hindustanica

Squilla oratoria var. perpensa Kemp, 1911:98 [part]; 1913: 70 [part; not pl. 5:figs. 57–59].

MATERIAL.—Tuticorin [08°47′N, 78°08′E], Madras, Gulf of Manaar, India; J. Hornell, leg.; holotype [paralectotype +of Squilla oratoria var. perpensa Kemp]: 1 , TL 66 mm (ZSI). Data same; paratypes [paralectotypes of Squilla oratoria var. perpensa Kemp]: 12 , TL 45–68 mm; 17 , TL 40–75 mm (ZSI 7037–41/10). Data same; paratypes [paralectotypes of Squilla oratoria var. perpensa Kemp]: 2 , TL 86–95 mm (USNM 125069; ex ZSI 7521–4/10). Data same; paratypes [paralectotypes of Squilla oratoria var. perpensa Kemp]: 1 , TL 67 mm; 1 , TL 69 mm (USNM 143576).

DESCRIPTION.—Size moderate, total length less than 100 mm. Body appearing smooth, minutely punctate under magnification.

Eye (Figure 7b) moderate to small, cornea bilobed, set obliquely on stalk. Eyes not extending to end of first segment of antennular peduncle. Corneal indices 309–412.

Antennular peduncle as long as, or slightly shorter than, carapace. Dorsal processes of antennular somite produced into acute, slender lobes, sharp but not spined, directed anterolaterally.

Rostral plate (Figures 7a, 15e) appearing elongate, length and width subequal or width slightly greater, lateral margins converging on broadly rounded apex. Median carina absent.

Anterior width of carapace much less than half median length. Anterolateral spines (Figure 7a) strong, extending to or slightly beyond base of rostral plate. Median carina interrupted at base of anterior bifurcation, branches of bifurcation distinct. Intermediate carinae turning toward but not meeting laterals, not extending to anterior margin.

Dactylus of claw with 6 teeth, outer margin of dactylus faintly sinuous. Dorsal ridge of carpus (Figure 7c) undivided. Inferodistal angle on outer face of merus with sharp spine.

Exposed thoracic somites (Figure 7d) with unarmed submedian and intermediate carinae, intermediates short, irregular, on fifth somite. Lateral process of fifth somite bilobed, anterior lobe a slender spine, directed almost anteriorly, posterior lobe triangular, apex acute, directed laterally. Lateral process of sixth somite bilobed, anterior lobe broad, apex trapezoidal, truncate or rounded; posterior lobe larger, triangular, apex obtusely pointed, unarmed. Lateral process of seventh somite bilobed; anterior lobe smaller than that of sixth somite, triangular; posterior lobe larger, triangular, apex obtusely pointed, unarmed.

Submedian carinae slightly divergent on fifth abdominal somite. Abdominal carinae spined as follows: submedian 5–6, intermediate 4–6, lateral (2)3–6, usually 2–6, marginal 1–5.

Telson flattened, longer than broad. Prelateral lobe longer than margin of lateral tooth. Denticles (Figure 7e) rounded or subquadrate, 4–5, 8–9, 1, outer submedians and outer intermediates largest. Ventral surface with short postanal keel.

Uropod broad, proximal segment of exopod as long as, or slightly longer than, distal, with 8–9 movable spines on outer margin, distalmost not extending to midlength of distal segment. Lobe on outer margin of inner spine of basal prolongation (Figures 7f, 15e) small, low, narrower than adjacent spine, margin concave, apex rounded.

COLOR.—Body light, ornamented with lines and patches of dark chromatophores. Eyestalks with numerous dark chromatophores, especially on ventral surface. Basal segments of antennae with dorsal and lateral patches of dark chromatophores. Margins, carinae, and grooves of carapace outlined with dark chromatophores. Dorsal surface of merus of claw with longitudinal dark line, outer surface with dark, distal patch proximal to articulation of carpus. Propodus of claw with distal dark patch. Exposed thoracic and all abdominal somites with dark posterior line, with submedian and intermediate carinae outlined in dark pigment, and with dark chromatophores middorsally. On abdomen, area between intermediate and lateral carinae with curved dark line, convex dorsally. Median area of telson, curved rows of pits, and bases of marginal teeth all dark. Midline of proximal segment of uropodal exopod dark, inner half of distal segment black. Uropodal endopod with margins of distal third dark, midline clear.

MEASUREMENTS.—Males, TL 45–68 mm; females, TL 40–95 mm. Other measurements of male holotype, TL 66 mm: CL 14.9, anterior width 6.6; cornea width 4.2; antennular peduncle length 15.6; rostral plate length 2.4, width 2.5; telson length 13.0, width 11.8.

DISTRIBUTION.—Known with certainty only from the type-locality, Tuticorin, Gulf of Manaar, Madras, India. Its range is yet to be determined.

Oratosquilla inornata (Tate, 1883)

Squilla inornata Tate, 1883:51, pl. 2: figs. 3a–c.—Manning, 1966:95, fig. 3 [part?].

MATERIAL.—Gulf of Saint Vincent [35°00′S, 138°05′E], South Australia; lectotype: 1 , CL 14.3 mm (SAM). Data same; paralectotype: 1 , TL 39 mm (SAM). 12 mi NNE of Bowen [20°01′S, 148°14′E], Queensland, Australia; 35–46 m; Endeavour, leg.: 1 , TL 91 mm (USNM 111379).

DESCRIPTION.—Size moderate, total length of adults 100 mm or less. Body appearing rough, surface coarsely pitted, rugose.

Eye (Figures 8b, 9b) moderate to small, cornea bilobed, set obliquely on stalk. Eyes not extending to end of first segment of antennular peduncle. Corneal indices 349–414.

Antennular peduncle shorter than carapace. Dorsal processes of antennular somite produced into acute but blunt lobes directed anterolaterally.

Rostral plate (Figures 8a, 9a) with length and width subequal or length slightly greater, appearing elongate, lateral margins converging on flattened apex. Median carina absent.

Anterior width of carapace less than half median length. Anterolateral spines of carapace (Figures 8a, 9a) strong, extending to but not overreaching base of rostral plate. Median carina interrupted at base of anterior bifurcation, branches of bifurcation distinct. Intermediate carinae turning toward but not meeting laterals, not extending to anterior margin.

Dactylus of claw sinuous, outer margin sinuous, with 6 teeth. Dorsal ridge of carpus (Figures 8c, 9c) undivided. Inferodistal angle on outer face of merus with sharp spine.

Exposed thoracic somites (Figures 8d, 9d) each with unarmed submedian and intermediate carinae, intermediates short, irregular, on fifth somite. Lateral process of fifth somite bilobed, anterior lobe a slender spine, directed anteriorly, posterior lobe smaller, triangular, apex acute but blunt, directed laterally. Lateral process of sixth somite bilobed, anterior lobe broad, apex rounded, posterior lobe much larger, triangular, apex acute, unarmed. Lateral process of seventh somite bilobed, anterior lobe smaller and more triangular than that of sixth somite, apex acute, unarmed, posterior lobe larger, triangular, apex acute, unarmed.

Submedian carinae parallel on fifth abdominal somite. Abdominal carinae spined as follows: submedian 5–6, intermediate 4–6, lateral 2–6 (3–6 in young female), marginal 1–5.

Telson flattened, longer than broad. Prelateral lobe shorter than margin of lateral tooth. Denticles (Figures 8e, 9e) subquadrate or rounded, 4, 7–9, 1. Ventral surface with short postanal keel.

Uropod broad, proximal segment of exopod subequal in length to distal, with 9 movable spines on outer margin, distalmost not extending to midlength of distal segment. Lobe on outer margin of inner spine of basal prolongation (Figures 8f, 9f) of uropod distally erect, narrower than adjacent spine, margin concave, apex rounded.

COLOR.—Pattern faded in all specimens examined.

MEASUREMENTS.—Only male examined, TL 91 mm; only intact female, a juvenile, TL 39 mm. Other measurements of damaged female lectotype: CL 14.3, anterior width 6.6; cornea width 4.1; antennular peduncle broken; rostral plate length 2.4, width 2.0; telson length 12.5, width 11.6.

DISTRIBUTION.—Known only from Bowen, Queensland, in 35–46 m, and from the Gulf of Saint Vincent, South Australia.