Some Recent Thraciidae, Periplomatidae, Myochamidae, Cuspidariidae and Spheniopsidae (Anomalodesmata) from the New Zealand region and referral of Thraciareinga Crozier, 1966 and Scintillona benthicola Dell, 1956 to Tellimya Brown, 1827(Montacutidae) (Mollusca : Bivalvia)

Abstract

Thracia vitrea (Hutton, 1873) is redescribed and referred to Thracia Blainville, 1824, subgenus Odoncineta O. G. Costa, 1829. The circum-Antarctic species Thracia meridionalis E. A. Smith, 1885 is newly recorded from New Zealand and referred to subgenus Crassithracia Soot-Ryen, 1941. New thraciids are described belonging to Asthenothaerus Carpenter, 1864 (one), Parvithracia Finlay, 1926 (s. str.) (one), Parvithracia (Pseudoasthenothaerus) Kamanev, 2002 (two) and Trigonothracia Yamamoto & Habe, 1959 (one). Myadora biconvexa Powell, 1927 and Parvithracia cuneata Powell, 1937 are referred to, Barythaerus, a new genus of Thraciidae. Thracia reinga Crozier, 1966 and Scintillona benthicola Dell, 1956 are referred to Tellimya Brown, 1827 in Montacutidae. The periplomatid Pendaloma micans (Hedley, 1901) is newly recorded as widely distributed off New Zealand. New data on shell morphology and distributions are provided for the myochamids Hunkydora novozelandica (Reeve, 1859) and Myochama tasmanica (Tenison Woods, 1877) and new species of Hunkydora Fleming, 1948 and Myadoropsis Habe, 1960 are described. Cuspidaria aupouria Dell, 1950 is referred to Rhinoclama Dall & E. A. Smith in Dall, 1886 (s. str.). A new and minute species of the Cuspidariidae from the Norfolk Ridge is referred to a new genus, namely Pseudogrippina, and cuspidariids belonging in Plectodon Carpenter, 1864 (three) and Rhinoclama (Austroneaera) Powell, 1937 (two) are described. The three Rhinoclama (Austroneaera) species previously recorded from the New Zealand region are reviewed. Spheniopsidae is transferred from Heterodonta to Anomalodesmata and tentatively grouped in Cuspidarioidea. Six new spheniopsids of the genus Grippina Dall, 1912 are described and G. aupouria (Powell, 1937) is redescribed.