Annachlamys, Iredale, 1939

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 : 210

Key to species of Annachlamys from Australia

1 Shell c. 100 mm high, subcircular, lv flattened, rv more inflated, almost equivalve and equilateral, auricles almost equal, valves with 16–20 evenly spaced radial plicae, commarginal microsculpture throughout disc, byssal notch shallow, byssal fasciole and ctenolium lacking in adults .................................................................. A. flabellata

—— Shell with 15–18 radial plicae with commarginal lamellae ...................................................... 2

2 Shell c. 80 mm high, subcircular, almost equally convex, inequivalve and equilateral, auricles unequal, valves with 15–18 evenly spaced radial plicae with prominent commarginal lamellae, secondary radial riblets in interspaces in adults, byssal notch shallow, byssal fasciole narrow, ctenolium rudimentary or lacking .................................................................................................................... A. iredalei

—— Shell with moderately inflated valves with 18–20 radial plicae ................................................ 3

3 Shell c. 100 mm high, subcircular, almost equally and moderately inflated, inequivalve and equilateral, auricles unequal, valves with 18–20 evenly spaced obsolete radial plicae, byssal notch shallow, byssal fasciole and ctenolium lacking in adults .................................................................................................................. A. kuhnholtzi

—— Shell with 16–18 broad radial plicae and narrow interspaces ................................................... 4

4 Shell c. 60 mm high, subcircular, almost equally and moderately inflated, inequivalve and equilateral, auricles almost equal, valves with 16–18 evenly spaced broad radial plicae, interspaces narrow, byssal notch shallow, byssal fasciole and ctenolium lacking in adults ..................................................................................... A. reevei significantly since. Sherratt et al. (2016) included both Annachlamys and Ylistrum in a minor basal clade in Decatopectinini , whereas Serb (2016) included Ylistrum in a basal clade of Decatopectinini but placed Annachlamys in Chlamydini (i.e., Pedini ) between Semipallium dringi and Equichlamys bifrons . In our opinion the subfamily and tribe position of Annachlamys requires further molecular comparison. Here we retain it in Pectinini , awaiting a more final molecular phylogeny.