Pliocardia “ cordata (Boss, 1968)

Kiel, Steffen, Aguilar, Yolanda M. & Kase, Tomoki, 2020, Mollusks from Pliocene and Pleistocene seep deposits in Leyte, Philippines, Acta Palaeontologica Polonica 65 (3), pp. 589-627 : 611-612

publication ID

https://doi.org/ 10.4202/app.00756.2020

publication LSID

lsid:zoobank.org:pub:3B7C70AD-CC73-44D5-921E-B1BA0503FC29

persistent identifier

https://treatment.plazi.org/id/03D8B71B-FFBF-F241-A384-FA01701E959A

treatment provided by

Felipe

scientific name

Pliocardia “ cordata
status

 

Clade Pliocardia “ cordata View in CoL group”

Remarks.—“ Pliocardia ” ticaonica reported below was considered very closely related to “ Pliocardia ” cordata (cf., Boss 1968) and hence most likely belong to the “ cordata group” sensu Johnson et al. (2017).

Pliocardia ” ticaonica Dall, 1908a View in CoL

Fig. 23 View Fig .

1908 Vesicomya ticaonica View in CoL sp. nov.; Dall 1908a: 63.

Material.—Three disarticulated specimens from the Pleistocene of Cambantug Point ( NMNS PM 28184–28186).

Dimensions (in mm).— NMNS PM 28185, L = 68.2, H = 52.5.

Remarks.— Huber (2010) considered “ Pliocardia ” ticaonica as a synonym of “ Pliocardia ” indica ( Smith, 1904) .

However, “ Pliocardia ” ticaonica is more elongate than “ P.” indica , and “ P.” indica has a more distinctive lunular incision than “ P. ” ticaonica . Hence, we prefer to retain the name “ P. ” ticaonica . The original description of Vesicomya ticaonica did not include a figure ( Dall 1908a). Although we have not seen the holotype of P. ticaonica , the Philippine Pliocene specimens are indistinguishable from two specimens labeled “ Vesicomya ticaonica ”, housed in the USNM ( USNM 248063 from the Philippines, station 5446 and USNM 229320 from Sibuko Bay, Borneo, Indonesia, station 5592).

When Boss (1968) described “ Pliocardia ” cordata , he considered it “remarkably similar, and probably most closely related, to V. ticaonica Dall ” ( Boss 1968: 735). The two shells are indeed very similar, and we concur with this view. Boss (1968) also considered the late Miocene Waisiuconcha alberdinae Beets, 1942 from Buton Island, Sulawesi, Indonesia, as a precursor or possibly even as a synonym of V. ticaonica . However, whether the much smaller (23 mm) and thin-shelled W. alberdinae is indeed closely related to the thick-shelled “ P.” ticaonica and “ P.” cordata remains to be tested.

Stratigraphic and geographic range.—Early Pleistocene, Leyte, Philippines. Recent: Philippines and Indonesia.

Pliocardia ” indica ( Smith, 1904) View in CoL

Fig. 24 View Fig .

1904 Vesicomya indica View in CoL sp. nov.; Smith 1904: 9.

Material.—One right valve from the Pleistocene of Cambantug Point NMNS PM 28419 (L = 45.9 mm, H = 38.8 mm).

Remarks.—For comments on the synonymy of “ P.” indica and “ P.” ticaonica see above.

Stratigraphic and geographic range.—Early Pleistocene, Leyte, Philippines. Recent: Bay of Bengal.

NMNS

National Museum of Natural Science

PM

Pratt Museum

USNM

Smithsonian Institution, National Museum of Natural History

Kingdom

Animalia

Phylum

Mollusca

Class

Bivalvia

Order

Venerida

Family

Vesicomyidae

Genus

Pliocardia

Loc

Pliocardia “ cordata

Kiel, Steffen, Aguilar, Yolanda M. & Kase, Tomoki 2020
2020
Loc

Vesicomya ticaonica

Dall, W. H. 1908: 63
1908
Loc

Vesicomya indica

Smith, E. A. 1904: 9
1904
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