Barbatia diphaeonotus, P. G. Oliver & Holmes, 2004

Oliver, P. Graham & Holmes, Anna, 2004, Cryptic bivalves with descriptions of new species from the Rodrigues lagoon, Journal of Natural History 38 (23), pp. 3175-3227 : 3178

Barbatia diphaeonotus n. sp.

( figures 8–12 )

HOLOTYPE: one complete shell, posterior margin of rv slightly chipped. RIBW 2001 station RDS 52, Grand Pate´ , off Port Mathurin, 19 ‡ 39.307 ’ S, 63 ‡ 24.950 ’ E, 29 September 2001, sand in surge channel, 17 m, scuba, coll. N. L. Bruce and J. Smith, NMW.Z.2001.061.00006.

PARATYPES: 1 lv. RIBW 2001 station RDS 52, Grand Pate´ , off Port Mathurin, 19 ‡ 39.307 ’ S, 63 ‡ 24.950 ’ E, 29 September 2001, sand in surge channel, 17 m, scuba, coll. N. L. Bruce and J. Smith, NMW .Z.2001.061.00007; three specimens (in alcohol), RIBW 2001 station RDS 52, Grand Pate´ , off Port Mathurin, 19 ‡ 39.307 ’ S, 63 ‡ 24.950 ’ E, 29 September 2001, sand in surge channel, 17 m, scuba, coll. N. L. Bruce and J. Smith, NMW .Z.2001.061.00049; two specimens (in alcohol), RIBW 2001 station RDS 51, Grand Pate´ , off Port Mathurin, 19 ‡ 39.307 ’ S, 63 ‡ 24.950 ’ E, 29 September 2001, dead coral rock, 14–16 m, scuba, coll. N. L. Bruce and J. Smith, NMW . Z.2001.061.00051; 20 valves and five valves (gold-coated on SEM stubs), RIBW 2001 Grand Pate´ , 18 m, shell gravel, NMW .Z.2001.061.00009; two specimens (in alcohol), RIBW 2001 station RDS 31, Grand Pate´ , off Port Mathurin, 19 ‡ 39.388 ’ S, 63 ‡ 25.130 ’ E, 23 September 2001, dead coral rock, 13–15 m, scuba, N. L. Bruce and M. Richmond, NMW .Z.2001.061.00050.

Other material. More than 20 valves, Réunion, shell gravel, ex Drivas, NMW.Z.2003.082.00001; eight valves, Saint Leu, Réunion, NMW.Z.2003. 082.00002.

Measurements (mm, L 6 H (6 B)). Holotype: 6.55 6 3.56 6 1.44. Paratypes from RIBW 2001, Grand Pate´: 2.94 6 1.79, 1.64 6 0.86, 3.19 6 1.94, 3.22 6 1.78,

Figures

FIGS. 8–16. (8–12) Barbatia diphaeonotus n. sp. (8–11) Holotype, NMW.Z.2001.061.00006: (8) external right valve (MontageTM); (9) external right valve (SEM); (10) internal right valve (SEM); (11) prodissoconch (SEM). (12) Paratype, NMW.Z.2001.061.00009, external left valve (MontageTM). (13) Barbatia elegans, C.305532, Australian Museum, Sydney (photo). (14–16) Barbatia sp., Réunion, NMW.Z.2001.061.00047 (SEM): (14) external right valve; (15) internal right valve; (16) prodissoconch.