Hostinella

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.[1] Specimens assigned to this genus have been found in Bathurst Island, Canada, in the Bertie Formation of Upper Silurian age (around 430 to 420 million years ago), where the stems are approximately 1.2 mm in diameter;[2] and in Lower Devonian Senni beds (from around 420 to 390 million years ago) where the axes have a straited external appearance and contain xylem with tracheids (diameter: 40 µm).[1]

Hostinella
Temporal range: Late Silurian to Early Devonian
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Class: †Trimerophytopsida
Order: †Trimerophytales
Family: †Trimerophytaceae
Genus: †Hostinella
Stur (1882)
Species
  • H. heardii D.Edwards (1980)[1]
  • H. hostinensis Barrande 1882
  • H. silurica Banks 1974
Synonyms

Hostimella Obrhel 1961

It is known to co-occur with Krithodeophyton.[1]

References
  1. Edwards, D. (1980). "Studies on lower Devonian petrifactions from Britain. 1. Pyritised axes of Hostinella from the Brecon Beacons quarry, Powys, South Wales". Review of Palaeobotany and Palynology. 29: 189–200. doi:10.1016/0034-6667(80)90058-5.
  2. Kotyk, M.E.; Basinger, J.F.; Gensel, P.G. & de Freitas, T.A. (2002), "Morphologically complex plant macrofossils from the Late Silurian of Arctic Canada", Am. J. Bot., 89 (6): 1004–1013, doi:10.3732/ajb.89.6.1004, PMID 21665700
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