CYCLOCHLAMYDIDAE, Dijkstra & Maestrati, 2012

Dijkstra, Henk H. & Maestrati, Philippe, 2012, Pectinoidea (Mollusca, Bivalvia, Propeamussiidae, Cyclochlamydidae n. fam., Entoliidae and Pectinidae) from the Vanuatu Archipelago, Zoosystema 34 (2), pp. 389-408 : 393-394

publication ID

https://doi.org/ 10.5252/z2012n2a12

DOI

https://doi.org/10.5281/zenodo.5172349

persistent identifier

https://treatment.plazi.org/id/B00A87C2-FF97-FFF0-633A-FA10F379FAEE

treatment provided by

Felipe

scientific name

CYCLOCHLAMYDIDAE
status

fam. nov.

CYCLOCHLAMYDIDAE View in CoL n. fam.

TYPE GENUS. — Cyclochlamys Finlay, 1926: 245 View in CoL . — Type species (by original designation): Pecten transenna [sic] Suter, 1913. Recent, New Zealand.

DIAGNOSIS. — Very small Pectinoidea (c. 1.2 up to 6 mm in height) with a smooth or variously sculptured left valve with a flat, weakly to strongly inflated or even conical and pointed sculptured prodissoconch, sometimes bordered by a strong flange-like commarginal lamella or rim ( Dijkstra & Marshall 2008: 24, fig. 20D) Right valve with a flattened sculptured prodissoconch, and commonly a smooth, rarely antimarginally sculptured, right valve with a simple outer prismatic layer of longitudinally hexagonal microstructure; internal riblets lacking.

REMARKS

This newly named family of micro-scallops includes three genera ( Cyclochlamys , Chlamydella Iredale, 1929 and Micropecten n. gen.) formerly classified in Propeamussiidae . Cyclochlamydidae n.fam. comprises c. 30 Recent species mainly recorded from southern Australia, eastwards to New Zealand,but also recorded from the West Pacific (southern Japan and Indonesia), southwestern Indian Ocean (Rodrigues), and the Falkland Islands.It is absent in the Arctic, the Atlantic, and the northern and eastern Pacific.

Cyclochlamydidae n. fam. differs from Propeamussiidae by the following morphological characters: – a sculptured prodissoconch in Cyclochlamydidae n. fam. (uniformly smooth in Propeamussiidae ); – a sometimes antimarginally sculptured right valve in Cyclochlamydidae n. fam. (smooth or weak commarginally sculptured in Propeamussiidae ); – a simple outer prismatic layer of longitudinally hexagonal microstructure on the right valve in Cyclochlamydidae n. fam. (an outer layer of columnar calcite in Propeamussiidae ).

Size: species of Cyclochlamydidae n. fam. measure 1.2 to 6 mm, whereas Propeamussiidae measure typically 5 to 120 mm in height.

Results of phylogenetic research attesting the monophyly of Cyclochlamydidae n. fam. will be published elsewhere.

Kingdom

Animalia

Phylum

Mollusca

Class

Bivalvia

Order

Pectinida

SuperFamily

Pectinoidea

Family

Cyclochlamydidae

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