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This genus contains the following two species:

Containing group: Sepiidae

Introduction

These small sepiids look much like other members of the family but they differ in having a reduced cuttlebone.

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Diagnosis:

A sepiid ...

• with cuttlebone restricted to anterior 75% of mantle.

Characteristics

1. Funnel
   1. Funnel component of locking apparatus with pit-like depression at midpoint of groove.

2. Mantle
1. Mantle nearly as broad as long.
2. Posterior gland and pore absent.
3. Shell
   1. Cuttlebone 75% of mantle in length; located in anterior part of mantle.
   2. Cuttlebone with rhomboidal shape.

      image info

      Figure. Dorsal, side and ventral views of the cuttlebone of M. tullbergi, 32 mm shell length, Japanese waters. Drawing from Sasaki (1929).

Distribution

Indo-Malayan subregion of the Indo-West Pacific region (Nesis, 1982/7).

References

Adam, W. and W. J. Rees. 1966. A review of the cephalopod family Sepiidae. Sci. Rep. John Murray Exped. 11: 1-165.

Khromov, D. N., C. C. Lu, A. Guerra, Zh. Dong and S. v. Boletzky. 1998. A synopsis of Sepiidae outside Australian waters. Smithson. Contr. Zool., 586: 77-156.

Lu, C. C. A synopsis of Sepiidae in Australian waters. 1998. Smithson. Contr. Zool., 586:159-190.

Sasaki, M. 1929. A Monograph of the Dibranchiate Cephalopods of the Japanese and Adjacent Waters. Journal of the College of Agriculture, Hokkaido Imperial University, 20(supplement):357 pages.