Hobaniella longicruris (Greville) P.A. Sims & D.M. Williams, 2018

Sims, Pat A., Williams, David M. & Ashworth, Matt, 2018, Examination of type specimens for the genera Odontella and Zygoceros (Bacillariophyceae) with evidence for the new family Odontellaceae and a description of three new genera, Phytotaxa 382 (1), pp. 1-56 : 38-41

publication ID

https://doi.org/ 10.11646/phytotaxa.382.1.1

DOI

https://doi.org/10.5281/zenodo.13724266

persistent identifier

https://treatment.plazi.org/id/12590703-F439-FFBF-22DC-F8C5FD392F0D

treatment provided by

Felipe

scientific name

Hobaniella longicruris (Greville) P.A. Sims & D.M. Williams
status

comb. nov.

Hobaniella longicruris (Greville) P.A. Sims & D.M. Williams , nov. comb. ( Figs 144–147 View FIGURES 144–147 )

Basionym:— Biddulphia longicruris Greville (1859: 163 , pl.8, fig.10)

Synonym:— Odontella longicruris (Greville) Hoban (1979: 87) , nom. invalid. Denticella longicruris (Greville) De Toni (1894: 886) Odontella longicruris (Greville) Hoban (1983: 283)

Type:— Californian guano; J. T. Norman ( Greville 1859; Williams 1988:19, pl. 23, figs 7–9; BM.1773, lectotype!)

Valve face oval with an elevation at each pole ( Fig. 144 View FIGURES 144–147 ), valves 20–100m in length. Valve face convex with a strongly raised valve centre lying between almost vertical long, narrow elevations ( Fig. 146 View FIGURES 144–147 ), ocellus on each summit ( Fig. 145 View FIGURES 144–147 ). Valve mantle steep merging at base into expanded hyaline valve margin. Areolae poroid, in rows radiating from valve centre extending length of narrow elevations. Areolae occluded by a simple velum ( Figs 145. 147 View FIGURES 144–147 ). Rimportulae 2, arising beneath the summit of central area inclined towards opposite poles, each opening through long narrow spine forked at its summit. Specialised pore probably present; valves exhibit a number of smaller, simple pores with elevated rims ( Fig. 147 View FIGURES 144–147 , arrow).

Observations:— With respect to the rimoportulae, Hoban (1979) notes between 1–3, with 2 being most common and Lavigne et al. notes a number of permutations, where “most specimens have one rimoportula per valve […] some have two [...] others have one on one valve and two on the other”, Lavigne et al. 2016: 309).

The combination Odontella longicruris was first made by Hoban in his PhD thesis ( Hoban 1979: 87, figs 70–88) but this is not a valid place of publication— Hoban’s 1983 paper is the valid source of the combination ( Hoban 1983: 283). This latter paper, however, lacks any images. Some eventually appeared in Hoban (2008: figs 1–8; these are the same images that can be found in Hoban 1979: figs 70–88).

Lavigne et al. (2016: 308–312) provide further images of living cells which have “numerous, small discoid chloroplasts” ( Lavigne et al. 2016: figs 2–5) and a handful of SEM images ( Lavigne et al. 2016: figs 6–23). Of note are the numerous external, domed cribra with a knob ( Lavigne et al. 2016: fig. 16).

The description above is based on specimens from Malibu and California USA (living) and from the culture ECT 25 V 112–1, Hunting Island, South Carolina, USA.

T

Tavera, Department of Geology and Geophysics

BM

Bristol Museum

V

Royal British Columbia Museum - Herbarium

Kingdom

Chromista

Phylum

Ochrophyta

Class

Bacillariophyceae

Order

Triceratiales

Family

Triceratiaceae

Genus

Hobaniella

Loc

Hobaniella longicruris (Greville) P.A. Sims & D.M. Williams

Sims, Pat A., Williams, David M. & Ashworth, Matt 2018
2018
Loc

Odontella longicruris (Greville)

Hoban 1983: 283
1983
Loc

Odontella longicruris (Greville)

Hoban 1979: 87
1979
Loc

Denticella longicruris (Greville)

De Toni 1894: 886
1894
Loc

Biddulphia longicruris

Greville 1859
1859
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