Acrosterigma lacunosa (Reeve, 1845)

Yasser, Amaal Gh., Naser, Murtada D., Abdul-Sahib, Ibtisam M. & Abdullah, Dawood S., 2023, New records of bivalves from the Iraqi coast, Ecologica Montenegrina 62, pp. 50-54 : 53

Acrosterigma lacunosa (Reeve, 1845)

( Fig. 1F )

Material examined: 1 specimen, length= 65 mm, ( MSC:505 ).

Shell description

Solid and moderately thick. Ovate, longer than it is wide. Sculpture of 31–35 radial ribs; posterior 6–8 with somewhat oblique, lamellar spines. Externally cream with zones, dots, and patches of ochre, chestnut, and mauve; internal edge reddish to purple-brown, umbonal cavity initially with a pair of longitudinal purple bars and suffused with fawn to orange.

Habitat: A. lacunosa lives in sand, offshore.

Distribution: NG, NWG, SEG, GO ( Fig. 2 ).

Figures

Figure 1. Photographs of some of the newly recorded species: A – Acar plicata (Dillwyn, 1817) 28mm; B – Sunetta effossa (Hanley, 1843) 42mm; C – Scissileda tropica (Melvill, 1897) 18mm; D – Protapes cor (Sowerby, 1853) 75mm; E – Circentia callipyga (Born, 1778) 47mm; F – Acrosterigma lacunosa (Reeve, 1845) 65mm.

Figure 2. Zones of distribution of marine bivalves in the Persian-Arabian Gulf.