Inachus aguiarii de Brito Capello 1876

Inachus aguiarii De Brito Capello, 1876

Inachus aguiari.—Monod, 1956:533, figs. 736–739 [Guinea].—Forest and Guinot, 1966:107 [Spanish Sahara].

Inachus aguiarii.—Zariquiey Alvarez, 1968:473, fig. 158c,d [Spain; references].

DISTRIBUTION.—Eastern Atlantic, from Portugal, Madeira, and Guinea; Mediterranean. Sublittoral, in depths between 20 and 200 m.

* Inachus angolensis Capart, 1951

Inachus angolensis Capart, 1951:72, fig. 22, pl. 1: fig. 7, pl. 2: fig. 10.—Monod, 1956:524, figs. 711–714.—Rossignol, 1957:77, 116 [key], pl. 1: fig. 1.—Gauld, 1960:72.—Rossignol, 1962:122.—Crosnier, 1964:34.—Forest, 1965b:394 [discussion].—Forest and Guinot, 1966:106.—Le Loeuff and Intès, 1968:31, 46, table 1, figs. 51, 63.—Maurin, 1968a:62; 1968b:486, 489, 491.—Le Loeuff and Intès, 1969:66.—Crosnier, 1970:1215 [listed], 1218.

Inachus.—Maurin, 1968b, figs. 4, 9.

?Inachus mauritanicus.—Maurin, 1968b:484 [not Inachus mauritanicus Lucas, 1846 = I. communissimus Rizza, 1839].

MATERIAL EXAMINED.—Pillsbury Material: Ivory Coast: Sta 42, 62–75 m, mud with brown, branched Foraminifera, 2, 2 (L). Sta 49, 73–77 m, 1 (L). Sta 50, 128–192 m, 1 (L). Sta 62, 46 m, brown, branched and foliate Foraminifera, 5, 1 (L). Sta 63, 64 m, sandy mud with shells, 3, 1 ov (L). Sta 64, 68 m, 1 (L).

Ghana: Sta 16, 46 m, mud with Foraminifera, shells, 1 (L). Sta 22, 51 m, rough bottom, 1 (W). Sta 28, 49–53 m, 2, 4 (L).

Nigeria: Sta 239, 73 m, 2 (L). Sta 241, 59–63 m, mud and shell, 7 (6 ov) (L).

Cameroon: Sta 259, 59 m, mud and broken shell, 26, 21 (3 ov) (W).

Undaunted Material: Angola: Sta 94, 90 m, 1, 1 (L). Sta 96, 162 m, 1, 1 (L). Sta 103, 90 m, 1 (L).

Other Material: Congo: Off Pointe-Noire, 150 m, slightly sandy mud, 27 Feb 1967, A. Crosnier, 1 (W).

DESCRIPTION.—Capart, 1951:72.

Figures: Capart, 1951, fig. 22, pl. 1: fig. 7; Monod, 1956, figs. 711–714.

Male Pleopod: Capart, 1951, pl. 2: fig. 10 (Angola); Monod, 1956, fig. 714 (Senegal).

MEASUREMENTS.—Our specimens have carapace lengths of 7 to 23 mm; the ovigerous females have carapace lengths of 12 to 16 mm. The largest specimen recorded by Capart (1951) was 23 mm long.

DISTRIBUTION.—West Africa, from localities between Spanish Sahara and southern Angola in depths between 46 and at least 350 m. Capart's (1951) material came from off the Congo and Angola and Monod (1956) reported material from Senegal; since 1956 it has been recorded from the following localities.

Spanish Sahara: Between Cabo Corbeiro and Cabo Blanco, 50–90 m (Maurin, 1968b).

Mauritania: Banc d'Arguin, 90–150 m (Maurin, 1968a), and 40–60, 60–70, and 90–100 m (Maurin, 1968b). Off Tamzak (as Tamxat), 200–400 m (Maurin, 1968b).

Senegal: Saint-Louis, 75–85 m (Maurin, 1968b). 12°55.5′N, 17°33′W, 65–75 m (Forest and Guinot, 1966).

Ivory Coast: No specific locality, 60+ m (Le Loeuff and Intès, 1969), 80–200 m (Le Loeuff and Intès, 1968).

Ghana: Off Accra, 60 m (Gauld, 1960). 04°40′N, 02°08′W to 04°39′N, 02°05′W, 50 m (Forest and Guinot, 1966).

Cameroon: No specific locality, depths greater than 50 m (Crosnier, 1964).

Congo: Off Pointe-Noire (Rossignol, 1957). W of Pointe-Noire (Rossignol, 1962).

Angola: 16°27′S, 11°35′E, 90 m; 16°41′S, 11°21′E, 162 m; and 17°06′S, 11°35′E, 90 m (Crosnier, 1970).

*Inachus biceps, new species

Inachus leptochirus.—Monod, 1956:535, 632, figs. 740–745.—Longhurst, 1958:89.—Gauld, 1960:72.—Forest and Guinot, 1966:107. [Not Inachus leptochirus Leach, 1817.]

MATERIAL EXAMINED.—Pillsbury Material: Ghana: Sta 17, 48 m, fine sand and green mud, 1 (L). Sta 23, 42 m, foliate brown to orange bryozoans, 6, 3 (2 ov) (L). Sta 24, 35–37 m, dark red bryozoans, 14 (includes holotype), 14 (13 ov) (L, W). Sta 26, 27m, shell bottom (scallops), 1, 2 (1 ov) (L).

Nigeria: Sta 248, 33 m, 1, 2 ov (L).

Other Material: Dahomey: Off Grand-Popo, 30 m, Petersen grab, 23 Feb 1964, Guinean Trawling Survey, Tr 34, Sta 2: 1, 1 ov (L).

DESCRIPTION.—Carapace (Figure 71a,d) broader than long. Gastric region with pair of tubercles anterior to erect gastric spine (Figure 72a). Cardiac region with low, rounded or obtuse dorsal projection, lower than gastric spine, flanked posteriorly on midline by lower prominence. Branchial regions each with dorsal tubercle, lateral branchial margin tuberculate. Hepatic region irregularly tuberculate anteriorly. Rostrum very short, teeth obtusely rounded, each usually with minute apical tubercle. Eyes large, cornea often extending laterally beyond broad postocular spine. Interantennular spine a very small, obtuse lobe, not visible in dorsal view, scarcely or not at all visible in lateral view (Figure 72a). Posterolateral border of carapace continuous with free epimeral margin. Basal antennal segment (Figure 72a,b) with row of tubercles, some sharp, on mesial and lateral margins, anterolateral angle of basal segment lacking prominent spine.

Chelipeds (Figure 72c) enlarged in adult males, about 1.5 times as long as carapace, merus and propodus markedly inflated in adult. Chelipeds in females slender, subequal to or slightly longer than carapace. Merus and carpus spiny in both sexes. Palm with row of large tubercles proximally on outer face in males. Palm depth 1/2 length in females, 2/3 length in males. Fingers subequal to or slightly longer than palm. Cutting edges of fingers unarmed basally in females, dactylus with 2 prominent proximal teeth in males.

First walking leg 4 or slightly more than 4 times as long as carapace, merus, propodus, and dactylus each longer than carapace in males, relatively shorter in females. Dactylus unarmed, sinuous distally, apex gently curved, length subequal to or slightly greater than that of propodus. Second to fourth walking legs decreasing in size posteriorly, fourth about twice carapace length in females, slightly longer in males. Second walking leg scarcely overreaching propodus of first by tip of dactylus. Latter sinuous, gently curved distally, shorter than propodus, with 1 or 2 subdistal teeth ventrally. Third walking leg not extending to end of propodus of second, overreaching carpus of second by distal third of propodus. Dactylus more curved than that of preceding leg, shorter than propodus, with 2 subdistal teeth ventrally. Fourth walking leg rather short, not extending to end of propodus of third. Dactylus short, more strongly curved than those of preceding legs but not sickle-shaped, length across arc subequal to that of propodus, armed ventrally with 1 or 2 large, subdistal teeth and several teeth proximally.

Male abdomen (Figure 72d) with terminal somite apically truncated. Male pleopod as shown in Figure 71e.f. Males with subcircular pearly sternal callosity (Figure 71g).

MEASUREMENTS.—Carapace lengths of males 5.9 to 10.7 mm, of non-ovigerous females 7 to 9 mm, of ovigerous females 6.8 to 8.7 mm.