Anadara ehrenbergi (Dunker, 1868)

Tudu, Prasad Chandra, Yennawar, Prasanna & Mohapatra, Anil, 2019, First report of two ark shells, Anadara consociata (E. A. Smith, 1885) and A. troscheli (Dunker, 1882) (Arcidae: Anadarinae) from Indian waters with notes on morpho-taxonomy of some related species from east coast of India, Records of the Zoological Survey of India 119 (1) : -

3. Anadara ehrenbergi (Dunker, 1868) ( Fig. 2 ; f & g)

1868. Anomalocardia ehrenbergi Dunker

1997. Anadra ehrenbergi : Al-Khayat,486

2006. Anadara (?Imparilarca) ehrenbergi : Luatenko, pl.5, fig.A-H

2010. Anadra ehrenbergi : Ramakrishna and Dey, 62

Material examined: 1ex, Vishakhapatnam (17° 42.452’N and 083° 18.823’E), 23-VI-2013, coll. A. Mohapatra and P.C. Tudu, ( MARC / ZSI M4156 ) .

Description: Shell medium in size (L up to 25.7mm & H up to 16.3mm), equivalve, elongate ovate; ventral margin smoothly arcuated and somewhat more or less curve; anterior margin rounded, and posterior margin widely rounded. Umbones much inflated, situated at anterior part, cardinal area quit narrow and elongate. Radial ribs not wide, flattened, squarish in cross-section, ornamented in top with fine regular ridges; number of ribs 26; there are fine regular ridges in interspaces of the ribs; width of interspaces is as wide as radial ribs. Ligamental area narrow, with shorter and narrower anterior side compared to posterior side; ligament opisthodetic, with chevron grooves. Beak prosogyrate, shifted anteriorly; tooth plate divided in two series a little posterior in beak, the anterior series twice as short as posterior series. Periostracum not found in this specimen as it is adequately old. Outside of shell greyish white or cheesy white in colour and inner with white in colour.

Distribution: In India: Andhra Pradesh (present report), Gujarat and Tamil Nadu (Ramakrishna and Dey, 2010); Elsewhere: Qatar ( Al-Khayat, 1997), throughout Indo-Pacific (Ramakrishna and Dey, 2010).

Remarks: Details mentioned in the A. consociata .

Figures

Figure 2. a-b,Anadara antiquata (Linnaeus, 1758); a- exterior of right valve, b- interior of right valve; c-e, A. consociata (E.A. Smith, 1885), c- exterior of left valve, d- interior of left valve & e- dorsal view of umbo; f-g, A.eherenbergi (Dunker, 1868), f- exterior of left valve, g- interior of left valve.