On the enigmatic diatom Rhizosolenia dubia, its relationship to Pseudopyxilla and Proboscia, and description of a new species, Proboscia pinocchioi sp. nov.
On the enigmatic diatom Rhizosolenia dubia, its relationship to Pseudopyxilla and Proboscia, and description of a new species, Proboscia pinocchioi sp. nov.
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关于神秘的硅藻Rhizosolenia dubia,它与Pseudopyxilla和Proboscia的关系,以及新物种Proboscia pinocchioi sp的描述。
DOI:
10.1080/0269249x.2022.2154280
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发表时间:
2022
期刊:
影响因子:
1.8
通讯作者:
R.W.
中科院分区:
文献类型:
--
作者:
Abe;K. & Jordan;R.W.
Pyxilla? dubiawas originally described from Jutland, but subsequently transferred toPseudopyxilla. However, the discovery, over eighty years apart, of two enigmatic specimens with tubular heterovalvate frustules featuring aPseudopyxilla dubiavalve at one end and a rhizosolenioid valve at the other end resulted in a new combination,Rhizosolenia dubia. Herein, we document in detail the valve morphology of specimens observed in early Eocene samples from Mors (Jutland) using light and scanning electron microscopy. Our results reveal the presence of both valve types (but never as heterovalvate frustules). The rhizosolenioid valves possess a proboscis with three spinulae at the tip (the middle one being very extensive), a longitudinal slit on the dorsal side, and claspers on the basal part of the domed valve on the ventral side. Our results suggest that thePseudopyxillafrustule is the resting spore of a yet, unknown diatom, while the ‘rhizosolenioid’ valve represents the vegetative phase of a new species,Proboscia pinocchioisp. nov. From an evolutionary standpoint,P. pinocchioilacks the longitudinal ridges of thecretacealineage, but bears the characteristic polar spinulae and limited pore distribution of thebarboilineage. However,P. pinocchioisurprisingly possesses claspers (normally observed only in thealatalineage) – representing the oldest evidence of claspers in rhizosolenioid diatoms.
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DOI:
--
发表时间:
1973
期刊:
--
影响因子:
--
作者:
C. Collodi;L. Cavalieri;M. A. Cavalieri
通讯作者:
M. A. Cavalieri
DOI:
10.1127/nova-suppl/2021/223
发表时间:
2021
期刊:
Nova Hedwigia, Beihefte
影响因子:
--
作者:
L. Medlin;Atchaneey Boonprakob;N. Lundholm;Ø. Moestrup
通讯作者:
Ø. Moestrup
DOI:
--
发表时间:
1985
期刊:
Bulletin of the British Museum of Natural History
影响因子:
--
作者:
R. Ross;P. Sims
通讯作者:
P. Sims
DOI:
--
发表时间:
1972
期刊:
--
影响因子:
--
作者:
L. Benda
通讯作者:
L. Benda
影响因子:
1.6
作者:
Inés Sunesen;E. Sar
通讯作者:
E. Sar