Craticula halophila (Grunow) D.G.Mann

Schuster Meise Botanic Garden, Tanja M., 2025, Observations and typification of two diatoms described by Grunow from Blankenberghe, Belgium: Nitzschia elegantula Grunow and Craticula halophila (Grunow) D. G. Mann (Bacillariophyceae), Notulae Algarum 368, pp. 1-7 : 3-5

Craticula halophila (Grunow) D.G.Mann ( Figs 35–49)

Basionym: Navicula cuspidata var. halophila Grunow , in Van Heurck, 1885, Synopsis des Diatomées de Belgique, Texte, p. 100, suppl. pl. B, fig. 30.

≡ Navicula halophila (Grunow) Cleve (1894, p. 109)

≡ Schizonema halophilum (Grunow) Kuntze (1898, p. 553)

Lectotype (here designated): BR-4866 ( BR!, Meise Botanic Garden). Fig. 41 illustrates the lectotype specimen.

Registration (of lectotypification): http://phycobank.org/105452

Type locality: Blankenberghe [Blankenberge], Belgium, Van Heurck Types du Synopsis n°12, sample and slides kept at BR .

Description: Valves rhombic to rhombic-lanceolate with straight, not convex valve margins. Apices acutely rounded, not protracted. Valve dimensions (n=15): length 30–48 µm, width 8–10 µm. Axial area narrow, linear. Central area small, elliptical. Raphe straight, filiform. Central raphe endings simple, straight. Terminal raphe fissures unilaterally bent. Internally central raphe endings located on a very weakly raised central nodule. Distal raphe endings terminating internally onto very small helictoglossae. Striae uniseriate, parallel to very weakly radiate in the middle, becoming convergent at the apices, 19–20 in 10 µm. Near the central area, striation pattern slightly irregular with occasionally one smaller stria inserted. Areolae apically elongated, rectangular, rather small, ca 40 in 10 µm. Virgae as broad as the striae.

Cholnoky, B.J. (1963). Beiträge zur Kenntnis der Ökologie der Diatomeen des Swakop-Flusses in Südwest-Afrika. Revista de Biología 3 (2- 4): 233–260.

Cleve, P.T. (1894). Synopsis of the naviculoid diatoms. Part I. Kongliga Svenska Vetenskapsakademiens Handlingar Series 4 26 (2): 1–194.

Czarnecki, D.B. (1994). The freshwater diatoms culture collection at Loras College, Dubuque, Iowa. In: Proceedings of the 11th International Diatom Symposium (Kociolek, J.P., ed.). Memoires of the California Academy of Sciences 17: 155–174.

Héribaud-Joseph, Frère [J.-B. C.] (1902). Les Diatomées Fossiles d'Auvergne. pp. 1–166: Libraire des Sciences Naturelles.

Hustedt, F. (1922). Bacillariales aus Innerasien. Gesammelt von Dr. Sven Hedin. In: Hedin, S. Southern Tibet, discoveries in former times compared with my own researches in 1906–1908. Lithographic Institute of the General Staff of the Swedish Army. Stockholm 6 (3): 107–152, 2 plates.

Hustedt, F. (1927). Fossile Bacillariaceen aus dem Loa-Becken in der Atacama-Wüste, Chile. Archiv für Hydrobiologie 18 (2): 224–251, 3 plates.

Hustedt, F. (1930). Bacillariophyta (Diatomeae) Zweite Auflage. In: Die Süsswasser-Flora Mitteleuropas. Heft 10. (Pascher, A. Eds), pp. [i]–vii, [1]–466. Jena: Verlag von Gustav Fischer.

Hustedt, F. (1959). Die Diatomeenflora des Neusiedler Sees im österreichischen Burgenland. Österreichische Botanische Zeitschrift 106 (5): 390–430.

Hustedt, F. (1961). Die Kieselalgen Deutschlands, Österreichs und der Schweiz unter Berücksichtigung der übrigen Länder Europas sowie der angrenzenden Meeresgebiete. Bd. VII: Teil 3: Lieferung 1. In: Rabenhorst's Kryptogamen Flora von Deutschland, Österreich und der Schweiz. (Anon. Eds), pp. 1–160. Leipzig: Akademische Verlagsgesellschaft.

Krammer, K. & Lange-Bertalot, H. (1986). Süsswasserflora von Mitteleuropa. Bacillariophyceae: Naviculaceae. Vol. 2 / 1 pp. {1]–xvi, {1]–876, 2976 figures, 206 plates. Stuttgart & New York: Gustav Fischer Verlag.

Kuntze, O. (1898). Revisio generum plantarum. Vol. 3 (3) pp. 1–576. Leipzig, London, Milan, New York, Paris: Arthur Felix, Dulau & Co., U. Hoepli, Gust. E. Stechert, Charles Klincksierck.

Lange-Bertalot, H. & Simonsen, R. (1978). A taxonomic revision of the Nitzschiae lanceolatae Grunow. 2. European and related extra European fresh water and brackish water taxa. Bacillaria 1: 11–111.

Lange-Bertalot, H. (2001). Navicula sensu stricto. 10 Genera separated from Navicula sensu lato. Frustulia. Diatoms of Europe 2: 1–526.

Round, F.E., Crawford, R.M. & Mann, D.G. (1990). The diatoms. Biology and morphology of the genera. pp. [i-ix], 1–747. Cambridge: Cambridge University Press.

Schoeman, F.R. & Archibald, R.E.M. (1976). The diatom flora of southern Africa. CSIR Special Report WAT 50 (1): [1–44], line-drawings and photographs variously numbered.

Simonsen, R. (1987). Atlas and catalogue of the diatom types of Friedrich Hustedt. Vol. 1. Catalogue. Vol. 2. pls 1–395. Vol. 3. pls. 396–772. pp. 1–525, 772 pls. Berlin & Stuttgart: J. Cramer in der Gebrüder Borntraeger Velagsbuchhandlung

Turland N.J., Wiersema J.H., Barrie F.R., Gandhi K.N., Gravendyck J., Greuter W., Hawksworth D.L., Herendeen P.S., Klopper R.R., Knapp S., Kusber W.-H., Li D.-Z., May T.W., Monro A.M., Prado J., Price M.J., Smith G.F. & Señoret C.Z. 2025: International Code of Nomenclature for algae, fungi, and plants (Madrid Code). – Chicago: The University of Chicago Press.

Van Heurck, H. (1881). Synopsis des Diatomées de Belgique, Atlas. pp. pls XXXI–LXXVII [31– 77]. Anvers: Ducaju et Cie.

Van Heurck, H. (1885). Synopsis des Diatomées de Belgique. Texte. pp. [1]–235. Anvers: Martin Brouwers & Co.