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

Brief diagnosis:

A sepiid ...

• with cuttlebone restricted to anterior 75% of mantle.

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 75-85% of mantle in length; located in anterior part of mantle.
   2. Cuttlebone with rhomboidal shape.
      

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

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

Depth range based on 74 specimens in 3 taxa.
Water temperature and chemistry ranges based on 30 samples.

Environmental ranges
  Depth range (m): 10.5 - 94.6786
  Temperature range (°C): 23.578 - 26.692
  Nitrate (umol/L): 0.129 - 1.886
  Salinity (PPS): 34.394 - 35.474
  Oxygen (ml/l): 4.190 - 4.703
  Phosphate (umol/l): 0.089 - 0.284
  Silicate (umol/l): 0.380 - 2.731

Graphical representation

Depth range (m): 10.5 - 94.6786

Temperature range (°C): 23.578 - 26.692

Nitrate (umol/L): 0.129 - 1.886

Salinity (PPS): 34.394 - 35.474

Oxygen (ml/l): 4.190 - 4.703

Phosphate (umol/l): 0.089 - 0.284

Silicate (umol/l): 0.380 - 2.731
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.

Barcode of Life Data Systems (BOLD) Stats
                                        

Specimen Records:	4	Public Records:	2
Specimens with Sequences:	3	Public Species:	1
Specimens with Barcodes:	3	Public BINs:	1
Species:	2
Species With Barcodes:	1

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