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. 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; and in Lower Devonian (from around 420 to 390 million years ago) where the axes have a straited external appearance and contain xylem with tracheids (diameter: 40 µm).
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| - 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. 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; and in Lower Devonian (from around 420 to 390 million years ago) where the axes have a straited external appearance and contain xylem with tracheids (diameter: 40 µm). (en)
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subdivision
| - * †H. bohemica (Kräusel & Weyland 1932)
* †H. crispa (Arnold 1939)
* †H. globosa (Lang 1925)
* †H. heardii (D.Edwards )
* †H. hercynica (Mägdefrau 1938)
* †H. hostinensis (Barrande )
* †H. racemosa (Lang 1925)
* †H. racheneuri (Ledoux-Marcelle 1927)
* †H. silurica (Banks )
* †H. strictissima (Høeg 1942)
* †H. wahnbachensis (Kräusel & Weyland 1935) (en)
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synonyms
| - * Hostimella (Obrhel 1961) (en)
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type species
| - Hostinella hostinensis (en)
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| - 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. 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; and in Lower Devonian (from around 420 to 390 million years ago) where the axes have a straited external appearance and contain xylem with tracheids (diameter: 40 µm). It is known to co-occur with Krithodeophyton. (en)
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