Parashiela invisibilis ( Hedley, 1899 )
publication ID |
https://doi.org/ 10.5252/zoosystema2023v45a25 |
publication LSID |
lsid:zoobank.org:pub:054D312B-C54B-459D-8A47-AC9CB681D7D4 |
DOI |
https://doi.org/10.5281/zenodo.10455611 |
persistent identifier |
https://treatment.plazi.org/id/03E387F1-0B4A-7529-FC1A-4FF7ED78FB06 |
treatment provided by |
Plazi |
scientific name |
Parashiela invisibilis ( Hedley, 1899 ) |
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Parashiela invisibilis ( Hedley, 1899) View in CoL
( Figs 22 View FIG ; 50 View FIG )
Rissoa invisibilis Hedley, 1899: 418 View in CoL , fig. 9.
TYPE MATERIAL. — Holotype. Tuvalu Islands • dd; Funafuti Atoll ; 8°31’1”S, 179°13’1”E; 1896; C. Hedley leg., Royal Society Coral Boring Expedition; AMS-C.5892 . GoogleMaps
TYPE LOCALITY. — Tuvalu Islands: Funafuti Atoll.
DISTRIBUTION. — Tropical Pacific ranging from the Philippines to southern Japan and to Hawaii (van Gemert 2016: 7) ( Fig. 50 View FIG ).
DIAGNOSIS. — Parashiela small for the genus, height 1.20 mm (holotype), ovate-conic. Protoconch paucispiral. Teleoconch with thin orthocline axial ribs, reaching the base and entering the narrow umbilical fissure; four thin spiral cordlets on the last whorl, 2 above the aperture and on upper whorls. Peristome duplicated, with thick and broad varix crossed by evident growth striae. Colouration uniform white.
REMARKS
We note that the holotype has two (not one as originally described: Hedley 1899: 418; van Gemert 2016: 7) very thin spiral cordlets above the aperture and on upper whorls.
We suspect that several of the specimens reported in the literature as P. invisibilis (e.g. Ekawa 1993: 80, pl. 2, fig. 14; Hasegawa 2000:150, pl. 75, fig. 12 [two images]; Hasegawa 2006b: 108, fig. 6; Poppe & Tagaro 2011: pl. 1306, fig. 3; Middelfart et al. 2020: 26, fig. 4A, as Parashiela cf. invisibilis ; but also by Severns 2011: 116, pl. 42, figs 1, 2, as Parashiela sp. and Parashiela beetsi ), which are larger and with more marked spiral and axial sculptures, may actually belong to one or more distinct and probably undescribed species.
See under P. rimatara n. sp. and P. expansilabrum n. sp. for detailed comparisons.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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Parashiela invisibilis ( Hedley, 1899 )
Amati, Bruno, Giulio, Andrea Di & Oliverio, Marco 2023 |
Rissoa invisibilis
HEDLEY C. 1899: 418 |