Published December 13, 2021
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Table 3 in New and poorly known " araphid " diatom species (Bacillariophyta) from regions near Lake Titicaca, South America and a discussion on the continued use of morphological characters in " araphid " diatom taxonomy
Authors/Creators
- 1. Water Laboratory, University of Evora, P. I. T. E. Rua da Barba Rala No. 1, 7005 - 345 Evora, Portugal & Institute of Earth Sciences - ICT, University of Evora, Rua Romao Ramalho n °. 59, 7000 - 671 Evora, Portugal
- 2. Observatory for Climate, Environment and Biodiversity (OCEB), Environmental Research and Innovation (ERIN) Department, Luxembourg Institute of Science and Technology (LIST), 41 rue du Brill, 4422 Belvaux, Luxembourg
Description
Table 3. Comparison of P. vulpina stat. nov. with most similar triradiate species in Pseudostaurosira and Pseudostaurosiropsis that have LM and SEM information available. ND=not determined. Features in bold italic font are defining for each taxon.
| Feature/species | P. iztaccihuatlii V.H. Salinas & D. Mora | P. vulpina stat. nov. | Pseudostaurosiropsis triradiatum (E. Morales) Kulikovskiy, Glushchenko & B. Karthick |
| Valve dimensions (µm) | L: 6.2-10.8 W: ND | L: 4.8-13.0 W: 4.1-5.6 | L: 7-10 W: ND |
| Stria density (in 10 µm) | 12-18 | 14-16 | 14-16 |
| Valve outline; axial area; virgae | Triradiate; irregularly triangular, externally and internally depressed with respect to the virgae; wide | Triradiate; irregularly triangular and externally depressed with respect to the virgae, internally at the same level as the latter; wide | Triradiate; triangular, with concave sides, depressed with respect to the virgae in external and internal view; much wider than striae |
| Areolae; volae; striae | Roundish to transapically elongate; well-developed and with ring-like depositions distorted in different ways at the valve interior; composed of several areolae, a single one on the valve mantle | Roundish to transapically elongated; well-developed and with inverted cone-like accumulations of different shape at the valve interior; composed of several areolae, a single one on the valve mantle | Circular; absent, with rotae instead; composed of up to 4 areolae 2 on valve face and 2 on the mantle |
| Spines; stipules; flaps | Large, conical base, spatulate tip, slightly slender than basal vimen; absent; absent | Small, conical, slender than basal vimen, sometimes shapeless and occurring on virgae and vimines; absent; absent | Small, conical, wider that basal vimen; absent; absent |
| Apical pore fields; mantle abvalvar blisters | Depressed, not known from valve interior view; large and extending to the apical portions but below the apical pore field | Depressed, opening into a non-depressed porous plate at the valve interior; large and extending to the apical portions but below the apical pore field | Not depressed, opening internally into a circular depressed zone; ND |
| References | Salinas et al. (2020) | Rumrich et al. (2000), this study | Morales (2005) |
Notes
Published as part of Morales, Eduardo A., Wetzel, Carlos E. & Ector, Luc, 2021, New and poorly known " araphid " diatom species (Bacillariophyta) from regions near Lake Titicaca, South America and a discussion on the continued use of morphological characters in " araphid " diatom taxonomy, pp. 23 in PhytoKeys 187 on page 23, DOI: 10.3897/phytokeys.187.73338
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References
- Salinas, VH, Mora, D, Jahn, R, Abarca, N, 2020. New species of Pseudostaurosira (Bacillariophyceae) including a tripolar taxon from mountain streams of Central Mexico. Phytotaxa 464 (3): 193 - 206, DOI: https://doi.org/10.11646/phytotaxa.464.3.1
- Rumrich, U, Lange-Bertalot, H, Rumrich, M, 2000. Diatoms of the Andes. From Venezuela to Patagonia/Tierra del Fuego. Iconographia Diatomologica 9: 1 - 649
- Morales, EA, 2005. Observations of the morphology of some known and new fragilarioid diatoms (Bacillariophyceae) from rivers in the USA. Phycological Research 53 (2): 113 - 133, DOI: https://doi.org/10.1111/j.1440-1835.2005.tb00363.x