Pliocardia “ cordata (Boss, 1968)
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 |
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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.
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Pliocardia “ cordata
Kiel, Steffen, Aguilar, Yolanda M. & Kase, Tomoki 2020 |
Vesicomya ticaonica
Dall, W. H. 1908: 63 |
Vesicomya indica
Smith, E. A. 1904: 9 |