Manningia australiensis Manning, 1970

Brokensha, Rouane, Landschoff, Jannes & Griffiths, Charles, 2023, New and notable stomatopods (Crustacea, Stomatopoda) from Mozambique, European Journal of Taxonomy 900 (1), pp. 148-179 : 152-154

Manningia australiensis Manning, 1970 new record

Fig. 3

Manningia australiensis Manning, 1970a: 78–81 , fig. 1 [type locality off Gillett Cay, Swain Reefs, Australia].

Manningia vinogradovi Makarov, 1978: 183 , fig. 4.

Manningia thorsoni Naiyanetr, 1987: 239 , figs 2–3.

Manningia australiensis – Makarov 1978: 183. — Moosa 1991: 154. — Manning 1995: 19, 34. — Ahyong 1997: 331, 332; 2001: 23–24, fig. 11. — Debelius 1999: 291. — Liu 2008: (list).

Diagnosis

A2 protopod with 1 ventral papilla; with blunt dorsal tooth and anteriorly-directed ventral spine. Rostral plate cordiform to subpentagonal; apex acute; rounded laterally. Raptorial claw merus without outer inferodistal spine. TS6–8 without carinae. AS 1–5 with MG carina and submarginal sulcus; unarmed posterolaterally. AS 6 with armed SM, IM, and LT carinae. Telson dorsolateral surface with distinct MD carina and 3 longitudinal carinae in addition to MG carina as follows: accessory MD carina interrupted, composed of 4 or 5 posteriorly directed spines; anterior IM carina uninterrupted, armed posteriorly; LT carina sinuous and recurved proximally terminating in 1 or 2 spines. Telson posterior margin with 3 broad horizontal lobes between SM and IM teeth, inner lobe with inner IM denticle on margin; with 2 broad horizontal lobes between IM and LT teeth. Telson ventral surface with depressed outer IM and LT denticles only. Uropodal protopod inner margin with 8–10 slender spines; exopod outer margin with 6–8 movable spines; endopod without carinae.

Material examined

MOZAMBIQUE • 1 ♂ (TL 30 mm); Sofala Province, Mozambique Channel ; 20°13′10.0″ S, 35°55′23.4″ E; 66–67 m depth; 22 Oct. 2017; RV Agulhas II; dredge; stn IIOE2 M205 INV264A; SAMC IIOE2 MOZ125 .

Colour in alcohol

Mostly faded, but with dorsal mottling of dark-brown pigment. Telson carinae with traces of dark colouration and dark-brown along lateral margins of primary teeth. The holotypic account ( Manning 1970a) of preserved material agrees with the present material. Colour in life unknown.

Measurements

Male (n = 1) TL 30 mm. A1 peduncle 0.94CL. A2 scale 0.43CL. Largest known specimen at TL 32 mm from Queensland, Australia ( Ahyong 2001).

Distribution and habitat

Vietnam, Thailand, New Caledonia, Papua New Guinea, Australia and now the Western Indian Ocean from Mozambique [Sofala]. Fine to coarse sand or shell substrates at depths 20– 93 m.

Remarks

This is the first record from the Western Indian Ocean, as well as the first record of the family Eurysquillidae from southern Africa. The depth and habitat profile matches that described for specimens from Australia and New Caledonia ( Manning 1970a; Moosa 1991; Ahyong 2001). Makarov’s (1978) specimen of M. vinogradovi from Vietnam and Naiyanetr’s (1987) M. thorsoni described from Thailand have subsequently been found to be indistinguishable from M. australiensis and are now considered synonyms ( Ahyong 2001). These species synonyms expanded the species range, which is now further extended across the Indian Ocean to the Mozambique Channel.

Manningia australiensis is distinguished from the other eleven species of Manningia by the shape of the rostral plate being cordiform to sub-pentagonal with rounded lateral margins and a small apical spine ( Fig. 3B ). The present specimen agrees well with previous accounts. The number of spines of the accessory median carina, as well as the outer margin of the uropodal exopod and the inner margin of the uropodal protopod for the specimen herein lie within the range of previously noted variation in telson and uropodal spination ( Moosa 1991; Ahyong 2001). The present specimen exhibits eight movable spines on the outer margin of the uropodal exopod, as well as eight spines on the inner margin of the uropodal protopod ( Fig. 3F ). Four spines adorn the accessory median carina ( Fig. 3E ).

Figures

Fig. 3. Manningia australiensis Manning, 1970, ♂, TL 30 mm (IIOE2MOZ125). A. Left raptorial claw, lateral. B. Anterior cephalothorax, dorsal. C. TS5–8, left dorsal. D. Telson, ventral. E. Telson and left uropod, dorsal. F. Left uropod, ventral. Scale bar = 1 mm.