Buccinulum (Euthrena)

Buccinulum robustum, copyright Auckland War Memorial Museum.

Belongs within: Buccinoidea.

The subgenus Euthrena of the genus Buccinulum is a group of whelks bearing a shell with flattened whorls with a sculpture of low broad axials, and a very small protoconch that is weakly axially ribbed at an early stage, the transition from juvenile to adult sculpture being a very well-marked brephic stage of narrow strong axial and spiral cords producing a coarse reticulation with the points of intersection marked as blunt gemmules (Finlay 1927).

<==Buccinulum (Euthrena Iredale 1918) P61
    |--B. (*E.) vittatum (Quoy & Gaimard 1833) P61 [=Fusus vittatus P61, *Euthrena vittata F27]
    |    |--B. v. vittatum P61
    |    `--B. v. costulatum (Suter 1913) P61 [=Euthrena costulata F27]
    |--B. (E.) bicinctum (Hutton 1873) P61 [=Fusus bicinctus F27, Euthrena bicincta F27]
    |--B. (E.) colensoi (Suter 1908) P61
    |--B. (E.) flavescens (Hutton 1884) P61
    |--B. (E.) heteromorphum Powell 1929 P61
    |    |--B. h. heteromorphum P61
    |    `--B. h. bucknilli Powell 1929 P61
    |--B. (E.) kaikouraense Powell 1929 P61
    |--B. (E.) littorinoides (Reeve 1846) P61
    |--B. (E.) maketuense Powell 1929 P61
    |--B. (E.) mariae Powell 1940 P61
    |--B. (E.) martensianum (Hutton 1878) P61 [=Euthrena martensiana F27]
    |--B. (E.) motutaraense Powell 1929 P61
    |--B. (E.) robustum Powell 1929 P61
    |--B. (E.) strebeli (Suter 1908) P61
    |    |--B. s. strebeli P61
    |    |--B. s. exsculptum Powell 1929 P61
    |    `--B. s. mestayerae Powell 1929 P61
    `--B. suteri Powell 1934 P61

*Type species of generic name indicated

REFERENCES

[F27] Finlay, H. J. 1927. A further commentary on New Zealand molluscan systematics. Transactions and Proceedings of the New Zealand Institute 57: 320–485.

[P61] Powell, A. W. B. 1961. Shells of New Zealand: An illustrated handbook 4^th ed. Whitcombe and Tombs Limited: Christchurch.