Eulithidium diantha (McLean, 1970)
synonymy
:
Tricolia
diantha McLean, 1970
usual
size : Height
1.7 to
2.1 mm (0.07
to
0.08 inch),
diameter 1.5 to
1.8 mm (0.06
to
0.07 inch)
Description
Habitat
& range
In sand, below tide level or in moderately deep water, down to 270 m.
Galápagos Islands ( type locality ) and Cocos Island, Costa Rica.
Original
description (from McLEAN,
1970d
: 125-126)
:
“ Shell small for the genus, postnuclear whorls 3.5. Nucleus of one flattened whorl,
1st postnuclear whorl developing a single angular carination that lasts only 2 / 3 of one turn.
Later whorls rounded, suture descending on final whorl, the immediate subsutural area
on the final whorl flat or slightly concave. Later whorls sculptured with fine, even spiral striae,
approximately 15 striations exposed on the penultimate whorl above the termination of the lip,
6 on the whorl directly above. Aperture proportionately large, nearly circular, outer lip thin,
inner lip bordering a narrow umbilical chink; in basal view, the extremely narrow umbilicus
is partially obscured by the inner lip. Color whitish - pink, with wavy and sometimes interrupted
axial striping of darker pink, a slight whitish blotching on the back side of the last whorl.
Height, 2.1, diameter, 1.7 mm.”
Remark
:
Bibliography relevant to occurrence in Galápagos
Mc LEAN, 1970 d ( original description ; Galápagos = type locality );
Mc LEAN in KEEN, 1971; HERTZ, 1977 [8(3)]; TAVIANI, 1979; FINET, 1985;
FINET, 1991; FINET, 1994b; KAISER, 1993; FINET, 1995a; KAISER, 1997.
Material from Galápagos in museums or other collections
| AMNH |
160270
( paratypes ). |
| ANSP |
319136
( paratypes ), 339998. |
| USNM |
679575 ( paratypes
). |
| LACM |
1397
( holotype ), 1398
( paratypes ), 33-156.1, 33-157.3,
33-164.1, 33-165.2, |
| |
33-166.6,
34-67.7, 34-263.3, 34-264.4, 34-267.1, 34-269.4, 34-270.3, 34-273.4, |
| |
34-279.4,
34-280.4, 34-281.5, 34-282.5, 34-287.2, 34-290.6, 34-291.1, 34-293.2, |
| |
34-295.2,
34-296.2, 34-297.1, 34-298.2, 34-299.1, 34-301.1, 38-57.2, 38-194.3, |
| |
66-121.10,
66-125.18, 72-196.14, 84-28.11. |
| CDRS |
1206, 1247. |
| FNRS
- Belgian expedition to the Galápaggos, 1984. |
| MHNG
expedition to the Galápagos, 1993. |