Perinotia Metzeltin & Lange-Bertalot, 2007

Holotype species: Perinotia jankae Metzeltin & Lange-Bertalot

Original publication and holotype designation: Metzeltin, D. & Lange-Bertalot, H. (2007). Tropical diatoms of South America II. Special remarks on biogeography disjunction. Iconographia Diatomologica 18: 1-877, incl. 296 pl.

Description: Cells genarally like Eunotia and Amphorotia with dorsi-ventral, biraphid frustules and bilaterally asymmetrical valves, apparently living solitary. The raphe system like Eunotia, for the largest parts restricted to the valve mantle, raphe slits proximally significantly longer than in Amphorotia but shorter than in Eunophora. Main differentiating character from Eunotia and other genera of the Eunotiaceae is the complex structural pattern of the dorsal parts of the valve. The widely spaced transapical striae are uniseriate in the ventral and middle part of the valve becoming multiseriate towards the dorsal side with five to seven branches, or irregularly arranged, sifnificantly smaller poroids lying in deltoid depressions roughly comparable to pore-fields of other genera. The transapical costae become narrower and higher in pervalvar extension being covered by projections of the valvocopula. Both form portula-like (not equivalent) arches towards the dorsal valve margin giving roughly an impression as in many species of Surirella (however without a raphe keel). No rimoportula can be detected. Spines are lacking. The girdle consists of few open, perforated and comparatively narrow copulae and the valvocopula. Structures of the protoplast are unknown, and as yet the genus is monotypic.

Information contributed by: Original description.. The most recent alteration to this page was made on 2023-08-28 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.

Verification of Data
Users are responsible for verifying the accuracy of information before use, as noted on the website Content page.

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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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=51586

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 28 August 2023. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 25 April 2024