taxonID	type	description	language	source
039287F1FFCFFF86C8A3FAB69A1CFD78.taxon	description	Registration (lectotypification): http: // phycobank. org / 105478 Type locality: Argentina, Corrientes province, Estero Carambola (28 ° 27 ' 22.7 " S, 57 ° 49 ' 14.9 " W). On aquatic macrophytes, 8. xii. 1923, leg. J. Frenguelli. Description: Valves clavate-lanceolate, with the widest part at the middle or slightly towards the apiculate headpole. Footpole slightly protracted and acutely rounded. Valve dimensions (n = 14): length 28 – 42 μm, width 8.5 – 10 µm. Axial area straight and narrow, occupying about one sixth of the valve width. Central area unilateral and rectangular, delimited by a very shortened stria opposite to the rounded stigma. Raphe filiform and somewhat sinuous. Central raphe endings slightly drop-like expanded. Terminal raphe fissures bent to the same side, in opposite direction to the stigma. Striae uniseriate, parallel at centre becoming radiate towards the apices, 14 – 15 in 10 µm at the centre, 16 – 17 in 10 µm at the poles, continuous onto the valve mantle. Areolae with C- or 3 - shaped volate occlusions, 40 in 10 μm, hardly discernible with LM. Internally, areolae with round foramina. Apical pore field located on the mantle, at the footpole only, composed of several rows of rounded poroids, divided in two areas by the raphe fissure. Mantle low, in right angle to the valve face. Girdle composed of open copulae, with one row of small poroids, 40 in 10 μm. No. 369 (10 April 2025) ISSN 2009 - 8987 Notes: In contrast to our measurements, Frenguelli (1933: 396) reported in his original description greater valve dimensions (length 41 – 57 μm, width 13 μm) and a lower stria density (10 – 12 in 10 μm). These discrepancies in morphometrics are usual when re-examining Frenguelli’s original materials (see Vouilloud & al. 2022 and references therein). Later records of G. correntinum are scarce but all come from subtropical areas in NE Argentina: Frenguelli (1953) reported this species from a basalt quarry in Misiones province and Herbst & Maidana (1983) found it in the flood plain of Paraná River in Chaco province.	en	Guerrero División Ficología, José M. (2025): Lectotypification of Gomphonema correntinum Frenguelli (Gomphonemataceae, Bacillariophyceae). Notulae Algarum 369: 1-4
039287F1FFCEFF84C8A3FCF99A42FF6E.taxon	description	We are grateful to Michael D. Guiry and an anonymous reviewer for comments and suggestions that improved our manuscript. Frenguelli, J. (1933). Contribuciones al conocimiento de las diatomeas Argentinas. VII. Diatomeas de la región de los Esteros del Yberá (en la Provincia de Corrientes). Anales del Museo Nacional de Historia Natural 37: 365475. Frenguelli, J. (1953). XIX Contribución al conocimiento de las diatomeas argentinas. Diatomeas del Territorio Nacional de Misiones. Revista del Museo de la Ciudad Eva Perón Nueva Serie 8 (Botánica No. 32): 63 – 86, 3 pls. Guiry, M. D. & Guiry, G. M. 2025. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https: // www. algaebase. org; searched on 01 April 2025. Herbst, N. & Maidana, N. I. (1989). Diatoms of Chaco (República Argentina): 1. Nova Hedwigia 49 (1 / 2): 207 – 232, incl. I pl., 1 fig. [map]. Hustedt, F. (1965). Neue und wenig bekannte diatomeen. IX. Süsswasserdiatomeen aus Brasilien, insbesondere des Amazonasgebietes. Internationale Revue der gesamten Hydrobiologie 50 (3): 391 – 410. 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. Radhakrishnan, C., Das, S. K., Kumar, V., Kociolek, J. P. & Karthick, B. (2020). A new freshwater Gomphonema Ehrenberg (Bacillariophyta) species from Eastern Himalayas, India. Fottea 20 (2): 128 – 136, 35 fig., 1 table. Turland, N. J., Wiersema, J. H., Barrie, F. R., Greuter, W., Hawksworth, D. L., Herendeen, P. S., Knapp, S., Kusber, W. - H., Li, D. - Z., Marhold, K., May, T. W., McNeill, J., Monro, A. M., Prado, J., Price, M. J. & Smith, G. F., editors (2018). International Code of Nomenclature for algae, fungi, and plants (Shenzhen Code) adopted by the Nineteenth International Botanical Congress No. 369 (10 April 2025) ISSN 2009 - 8987 Shenzhen, China, July 2017. Regnum Vegetabile, Vol. 159. pp. [i] - xxxviii, 1 – 253. Glashütten: Koeltz Botanical Books. Vouilloud, A. A., Guerrero, J. M., & Morales, E. A. (2022). Fragilaria pinnata var. subcapitata Frenguelli, typification and current taxonomic status. Phytotaxa 566 (1), 133 – 139. No. 369 (10 April 2025) ISSN 2009 - 8987	en	Guerrero División Ficología, José M. (2025): Lectotypification of Gomphonema correntinum Frenguelli (Gomphonemataceae, Bacillariophyceae). Notulae Algarum 369: 1-4
