Thieleella equatoria ( Hedley, 1899 )

Geiger, Daniel L. & Jansen, Patty, 2004, Revision of the Australian species of Anatomidae (Mollusca: Gastropoda: Vetigastropoda), Zootaxa 415 (415), pp. 1-35 : 26-27

publication ID

https://doi.org/ 10.11646/zootaxa.415.1.1

publication LSID

lsid:zoobank.org:pub:65EC7C1E-178D-4358-82C2-F8065B5BD832

DOI

https://doi.org/10.5281/zenodo.5236399

persistent identifier

https://treatment.plazi.org/id/03FD87F6-FFCB-FFD9-D11C-4808C72B57FE

treatment provided by

Felipe

scientific name

Thieleella equatoria ( Hedley, 1899 )
status

 

Thieleella equatoria ( Hedley, 1899) : Figures 14 View FIGURE 14 , 18 View FIGURE 18

Scissurella equatoria Hedley, 1899: 551–552 , fig. 61.

Scissurella aequatoria [sic]: Hedley, 1903: 330.

Scissurella equatoria: Thiele, 1912: 20 , pl. 3, fig. 4 [copy of figure in Hedley, 1899].

Anatoma equatoria: Habe & Kosuge, 1964: 4 .

Type material. HOLOTYPE ( AMS C.5639), 3 x 2.68 mm (H x W).

Type locality. Tutaga Islet, Funafuti Atoll, 200 fms. [= 365 m, 8.617°S, 179.083°E,] (OD).

Etymology. Most likely named for its occurrence near the equator.

Description. Shell globular, medium size (to 3 mm: holotype). Protoconch almost 1 whorl, with reticulate sculpture, no varix. Teleoconch I slightly more than 1/2 whorl, with 15 axials, spirals not visible. Teleoconch II with up to 3.5 whorls (holotype: fide Hedley, 1899), axials 75 (1.83 mm specimen: figure 13) to 85 (3 mm specimen: holotype) on body whorl. Spirals on shoulder extremely faint, on base very fine, forming reticulate interstices with axials. Umbilicus open, deep, sloping continuously from base. Selenizone at periphery, strong keels, axials on keels finer and more numerous than axials on shell proper; margins of slit parallel. Aperture rounded, flared towards umbilicus. Animal unknown.

Differential Diagnosis. Anatoma turbinata has flocculant protoconch sculpture compared to a reticulated one, is more turreted, has a smaller aperture compared to overall shell size, has fewer axials, and more prominent spirals.

Specimen records. Off NE point, Christmas Island, Australia, 183 m (AMS C.405015, 1: shell only).

Remarks. This species is currently only known from two specimens, the holotype and the additional specimen figured here ( Fig. 13 View FIGURE 13 ).

Kingdom

Animalia

Phylum

Mollusca

Class

Gastropoda

Order

Vetigastropoda

Family

Anatomidae

Genus

Thieleella

Loc

Thieleella equatoria ( Hedley, 1899 )

Geiger, Daniel L. & Jansen, Patty 2004
2004
Loc

Anatoma equatoria:

Habe, T. & Kosuge, S. 1964: 4
1964
Loc

Scissurella equatoria:

Thiele, J. 1912: 20
1912
Loc

Scissurella aequatoria

Hedley, C. 1903: 330
1903
Loc

Scissurella equatoria

Hedley, C. 1899: 552
1899