Hostinella

{{Short description|Form genus}} {{Automatic taxobox |taxon = Hostinella |fossil_range = {{geological range/linked|Late Silurian|Early Devonian}} |authority = Barrande (1868) ex Štúr (1882) | type_species = ''Hostinella hostinensis'' | type_species_authority = Barrande (1882) |subdivision = * †''H. bohemica'' Kräusel & Weyland 1932 * †''H. crispa'' Arnold 1939 * †''H. globosa'' Lang 1925 * †''H. heardii'' D.Edwards (1980)<ref name="Edwards1980" /> * †''H. hercynica'' Mägdefrau 1938 * †''H. hostinensis'' Barrande (1882) * †''H. racemosa'' Lang 1925 * †''H. racheneuri'' Ledoux-Marcelle 1927 * †''H. silurica'' Banks (1974) * †''H. strictissima'' Høeg 1942 * †''H. wahnbachensis'' Kräusel & Weyland 1935 |synonyms = * ''Hostimella'' (sic) Obrhel 1961 }}

'''''Hostinella''''' is a form genus, used for bare dichotomously branching stems (axes) which have not been found in association with spore-forming organs or sporangia and so cannot be assigned to a more precise genus or species.<ref name="Edwards1980"/> Specimens assigned to this genus have been found in Bathurst Island, Canada, in the Bertie Formation of Upper Silurian age (around {{Period span/brief|Upper Silurian|-1}}), where the stems are approximately 1.2 mm in diameter;<ref name="BasingerGenseldeFreitas2002"/> and in Lower Devonian Senni beds (from around {{Period span/brief|Lower Devonian|-1}}) where the axes have a straited external appearance and contain xylem with tracheids (diameter: 40 μm).<ref name="Edwards1980" />

It is known to co-occur with ''Krithodeophyton''.<ref name="Edwards1980" />

== References == {{Reflist|refs=

<ref name="BasingerGenseldeFreitas2002">{{Citation |last1=Kotyk |first1=M.E. |last2=Basinger |first2=J.F. |last3=Gensel |first3=P.G. |last4=de Freitas |first4=T.A. |year=2002 |title=Morphologically complex plant macrofossils from the Late Silurian of Arctic Canada |journal=Am. J. Bot. |volume=89 |issue=6 |pages=1004–1013 |doi=10.3732/ajb.89.6.1004 |name-list-style=amp |pmid=21665700|doi-access=free }}</ref>

<ref name="Edwards1980">{{Cite journal | last1 = Edwards | first1 = D. | title = Studies on lower Devonian petrifactions from Britain. 1. Pyritised axes of ''Hostinella'' from the Brecon Beacons quarry, Powys, South Wales | journal = Review of Palaeobotany and Palynology | volume = 29 | pages = 189–200| year = 1980 | doi = 10.1016/0034-6667(80)90058-5 | bibcode = 1980RPaPa..29..189E }}</ref>

}}

Category:Silurian plants Category:Early Devonian plants Category:Prehistoric plant genera Category:Silurian first appearances Category:Early Devonian genus extinctions Category:Paleozoic life of Ontario Category:Paleozoic life of Nunavut Category:Bertie Formation Category:Prehistoric plants of North America