Thalpophila Borzì, 1907

Holotype species: Thalpophila cossyrensis Borzì

Original publication and holotype designation: Borzì, A. (1907). I generi delle Stigonemacee. In: Atti del Congresso dei naturalisti italiani: promosso dalla Società italiana di scienze naturali, Milano, 15-19 settembre 1906. (Anon. Eds), pp. 370-375. Milano [Milan]: Società italiana di scienze naturali. Tipografia degli operai.

Description: Filamentous - thallose; thallus in form of mats on the substrate with more or less parallel oriented or slightly coiled creeping filaments, rarely with true branches. Trichomes uniseriate, not distinctly diversified, old more torulous, young ones cylindrical and sometimes slightly thinner, both constricted at crosswalls, not attenuated toward the ends, with rounded terminal cells. True branching of T-type, lateral; branches bent soon into the direction of the original trichome. Sheaths thick, lamellated, gelatinous from outside and confluent sometimes with neighboring sheaths. Cell barrel-shaped or cylindrical, with finely granular content. Heterocytes intercalary, barrel-shaped, solitary, not very common. Akinetes described, small, developing serially in rows in old trichomes, with thickened cell wall. Cells divide crosswise. Reproduction only by solitary cells (monocytes), liberating from open sheaths, hormogonia or hormocysts not known. The type species described from volcanic rocks near thermal springs (atmophytic) on the Italian island, Pantellaria, the other species are known from calcareous substrate of thermal springs in Yellowstone National Park, USA and from thermal waters in Japan.

Information contributed by: J. Komárek. The most recent alteration to this page was made on 2023-03-06 by M.D. Guiry.

Taxonomic status: This name is of an entity that is currently accepted taxonomically.

Gender: This genus name is currently treated as feminine.

Most recent taxonomic treatment adopted: Strunecký, O., Ivanova, A.P. & Mares, J. (2022 '2023'). An updated classification of cyanobacterial orders and families based on phylogenomic and polyphasic analysis (Review). Journal of Phycology 59(1): 12-51.

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Contributors
Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in CD format. These AlgaeBase descriptions are now being continually updated, and each current contributor is identified above. The PSA and AlgaeBase warmly acknowledge the generosity of all past and present contributors and particularly the work of Dr Parker.

Descriptions of chrysophyte genera were subsequently published in J. Kristiansen & H.R. Preisig (eds.). 2001. Encyclopedia of Chrysophyte Genera. Bibliotheca Phycologica 110: 1-260.

Linking to this page: https://www.algaebase.org/search/genus/detail/?genus_id=46475

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 06 March 2023. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 26 April 2024