Epitoniidae
Epitonium eximium (Adams & Reeve, 1850)
[Sagami itokake]
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| fig. 1a | fig. 1b |
Description
Slightly glossy white, with plate like axial ribs which sharpens a little on
the shoulder, having weak spiral ribs between each axial ribs. Resembles
Epitonium eusculptum and Epitonium eximiellum. However, the number of axial
rib in E. eusculptum is small, and each axial rib is weak. Also, the
E. eximiellum is thin.
*1
Locality
Japan:
Kyushu, Shikoku, Setonaikai, South of Sado Island,
Sagami Bay in 0-50m, Mouth of Tokyo Bay in 20-50m (fig.1),
Boso Peninsula, Sanriku coast.
Original articles of scientific name
1850 Scalaria eximia A. Adams & Reeve, Mollusca. page(s): 51-52, pl. 11, fig. 16.
Original of Japanese name
1914 Yoichiro Hirase.
Remarks
The scientific name for Sagami itokake used to be Cinctiscala sagamiense
(Pilsbry, 1911),
but it's now Epitonium eximium (Adams & Reeve, 1850). And C. sagamiense
is apparently a synonym.
The specimen shown in Fig. 1 was collected in Mouth of Tokyo Bay. It resembles the
type of C. sagamiense (Pilsbry, 1911) which collected Kamakura, Sagami Bay.
Unfortunately, I haven't seen the type of E. eximium. However, the shell shown in
Adams & Reeve, 1850 pl. 11, fig. 16 is slightly thicer and have fewer axial ribs
than the specimen shown in fig. 1 above. Furthermore, the origin is only listed as
"China Sea," and no further details are available.