Mesopeplum Iredale, 1929

Dijkstra, Henk H. & Beu, Alan G., 2018, Living Scallops of Australia and Adjacent Waters (Mollusca: Bivalvia: Pectinoidea: Propeamussiidae, Cyclochlamydidae and Pectinidae), Records of the Australian Museum (Rec. Aust. Mus.) 70 (2), pp. 113-330 : 173

publication ID

https://doi.org/ 10.3853/j.2201-4349.70.2018.1670

publication LSID

lsid:zoobank.org:pub:8084C----

DOI

https://doi.org/10.5281/zenodo.5305901

persistent identifier

https://treatment.plazi.org/id/039A87AD-F825-3678-FEDE-2CCFFAF5FD3A

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Felipe (2021-08-21 08:16:27, last updated 2023-11-04 05:56:28)

scientific name

Mesopeplum Iredale, 1929
status

 

Mesopeplum Iredale, 1929 View in CoL

Mesopeplum Iredale, 1929: 162 View in CoL . Type species (by original designation): Mesopeplum caroli Iredale, 1929 View in CoL (= Chlamys fenestrata Hedley, 1901 View in CoL ); Recent, New South Wales, Australia.

Dendopecten Hertlein, 1936: 26 View in CoL . Type species (by original designation): Pecten dendyi Hutton, 1902 View in CoL ; early Pliocene , Momoe-a-toa Shellbed, Chatham Island, New Zealand.

Diagnosis. Mesopeplini with weakly subdivided radial plicae or costae on large radial plicae (five plicae in many species); left valve flat to weakly convex, right valve strongly convex; pre-radial dissoconch with reticulate commarginal and antimarginal microsculpture; radially sculptured area of disc with widely spaced commarginal lamellae; internal rib carinae prominent near ventral margin; resilial teeth prominent early in ontogeny but weak or absent in late ontogeny; ctenolium obsolete or almost so in late ontogeny in some species, functional in others.

Distribution. Late Eocene–Recent. New Zealand, temperate Western Australia, South Australia, Tasmania, New South Wales and southern Queensland, living in the littoral to bathyal zones on soft sediment.

For fossil records see Beu & Maxwell (1990), Beu (1995) and Beu & Darragh (2001). The holotype of Mesopeplum polymorphoides ( Zittel, 1865) (Beu et al., 2012: fig. 11B) from Glen Massey Formation at Waikato South Head, southwest Auckland, is early Whaingaroan in age, and so late Eocene (Priabonian). Also, a specimen of a typical Mesopeplum species collected by Prof. T. Kotaka from the Point Elizabeth section, north of Greymouth, Westland (IGPS96853) is Kaiatan or Runangan in age (Bartonian– Priabonian). Mesopeplum definitely occurs in late Eocene rocks in New Zealand, although suitable facies for it apparently are rare.

Discussion. Hertlein (1969, p. N366) treated Mesopeplum and its supposed junior synonym Notochlamys Cotton, 1930 as a subgenus of Semipallium Jousseaume in Lamy, 1928, placed in the Decatopecten group. Currently Mesopeplum and Notochlamys are considered to be valid genera ( Waller, 1991) with different ancestries. Mesopeplum was placed in Mesopeplini by Waller (2006a) whereas Notochlamys is retained in Pedini .

Figure 28. Distribution of Mesopeplum fenestratum (Hedley) .

Iredale, T. 1929. Mollusca from the continental shelf of eastern Australia. No. 2. Records of theAustralian Museum 17 (4): 157 - 189. https: // doi. org / 10.3853 / j. 0067 - 1975.17.1929.759

Lamy, E. 1928. Les peignes de la Mer Rouge (d'apres les materieux recueillis par le Dr Jousseaume). Bulletin du Museum national d'Histoire naturelle 34: 166 - 172.

Waller, T. R. 1991. Evolutionary relationships among commercial scallops (Mollusca: Bivalvia: Pectinidae). In Scallops: Biology, Ecology and Aquaculture, ed. S. E. Shumway, pp. 1 - 73. Amsterdam: Elsevier.

Waller, T. R. 2006 a. New phylogenies of the Pectinidae (Mollusca: Bivalvia): reconciling morphological and molecular approaches. In Scallops: Biology, Ecology and Aquaculture. Second Edition, ed. S. E. Shumway and G. J. Parsons, pp. 1 - 44. Amsterdam: Elsevier. https: // doi. org / 10.1016 / S 0167 - 9309 (06) 80028 - 1

Zittel, K. A. 1865. Fossile Mollusken und Echinodermen aus Neu-Seeland. nebst Beitragen von den Herren Bergrath Franz Ritter v. Hauer und Professor Eduard Suess. In Palaontologie von Neu-Seeland. Beitrage zur Kenntniss der fossilen Flora und Fauna der Provinzen Auckland und Nelson, von Prof. Dr F. Unger, Prof. Dr. Karl Zittel, Prof. E. Suess, Felix Karrer, Dr. Ferdinand Stoliczka, Dr. Guido Stache, Dr. Gustav Jaeger. F. von Hochstetter, M. Homes & F. Ritter von Hauer, eds, Reise der Oterreichischen Fregatte Novara um die Erde in den Jahren 1857, 1858, 1859 unter der Befehlen der Commodore B. von Wullerstorf-Urbair, Geologischer Theil 1 (2): 15 - 68 (Cenozoic Mollusca revised by Beu et al., 2012).

Kingdom

Animalia

Phylum

Mollusca

Class

Bivalvia

Order

Pectinida

Family

Pectinidae