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Fragilariforma rakiuriensis C.Kilroy & K.Sabbe
In this section
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Factsheets
- Achnanthes crosbyana
- Actinella aotearoaia
- Caloneis clevei var. carteriana
- Cavernosa kapitiana
- Dimerogramma maculatum fo. mercuryensis
- Entomoneis wilkinsonia
- Eolimna krummensis
- Eunophora berggrenii
- Eunotia sudetica var. hamuranaensis
- Fallacia vittata var. rotoehuensis
- Fragilariforma cassieae
- Fragilariforma rakiuriensis
- Frankophila biggsii
- Frustulia aotearoa
- Frustulia cassieae
- Frustulia gondwana
- Frustulia maoriana
- Gyrosigma foxtonia
- Gyrosigma sterrenburgii
- Hamatusia reediana
- Navicula barberiana
- Navicula cassieana
- Navicula tairuaensis
- Pinnularia barberiana
- Pinnularia barberiana var. opouraensis
- Pinnularia chapmaniana
- Pinnularia opouraensis
- Pinnularia segariana
- Pinnularia woodiana
- Planothidium victori
- Pleurosigma amarum
- Sellaphora styxii
- Surirella rattrayi f. acuminata
- Tabularia variostriata
- Thalassiosira hasleae
Known distribution
New Zealand
Stewart Island: Deceit Peaks, open rocky stream at 500 m, pH 5; Table Hill, flowing and standing water, pH 5.2-5.6, EC 100 µS/cm.
Australia
Tasmania: Western Lakes, e.g. Sappho Lake, pH c. 6.1, EC 16 µS/cm.
Etymology
Meaning "from Rakiura", one of the Māori names for Stewart Island.
Description
Valves 11-55 µm long, (5.5-)6.5-9 µm wide. Girdle view: narrowly rectangular. Colonies linear. Open girdle bands 2-4, with rows of poroids on edges facing epitheca. Valve view: lanceolate, constricted centrally, with distinctly protracted apices, to rhombic with narrow protracted apices. Constricted-rhombic transition at 22.5-29 µm long. Striae 11-14 in 10 µm, fine, continuous across valve and mantle, approx. parallel but usually irregular, axial break only occasional; areolae not visible in LM. Marginal spines simple tapering hollow tubes on interstriae, absent at apices. Mantle plaques usually absent.
NOTE: abridged to satisfy the publisher's copyright requirements.
Notes
Funding from TFBIS (Terrestrial and Freshwater Biodiversity Information System), administered by the New Zealand Department of Conservation, is gratefully acknowledged.
Reference
Kilroy C, Sabbe K, Bergey EA, Vyverman W, Lowe R 2003. New species of Fragilariforma (Bacillariophyceae) in New Zealand and Australia. New Zealand Journal of Botany 41: 535-554.