Flagellospora stricta Sv. Nilsson, Bot. Notiser

Fiuza, Patrícia O., Cantillo-Pérez, Taimy, Gulis, Vladislav & Gusmão, Luís F. P., 2017, Ingoldian fungi of Brazil: some new records and a review including a checklist and a key, Phytotaxa 306 (3), pp. 171-200 : 185

Flagellospora stricta Sv. Nilsson, Bot. Notiser 115: 82, 1962. ( Fig. 4I )

Material examined: — BRAZIL. Bahia: Piatã, Chapada Diamantina, on submerged leaves of Calophyllum brasiliense ( Calophyllaceae ), 10 November 2013, P. O. Fiuza s.n ( HUEFS 215892).

Conidiophores branched, septate, hyaline, 40–60 × 4.5–5 μm. Conidiogenous cells phialidic, clavate, terminal, hyaline, 8–15 × 3–4.5μm. Conidia filiform, straight, aseptate, hyaline, 20–50 × 1–1.5 μm.

Geographical distribution:— Poland ( Orłowska et al. 2004); Sweden ( Nilsson 1962b, 1964).

Notes:— Flagellospora stricta is distinguished from other species of Flagellospora by having straight conidia ( Nilsson 1962b). In Brazil, one species of Flagellospora — F. curvula ( Ingold 1942: 404) —has been recorded from the Atlantic Forest on mixed submerged leaves ( Schoenlein-Crusius et al. 2009), from the Caatinga in foam ( Fiuza & Gusmão 2013a) and from the Amazon in foam ( Fiuza et al. 2015). It is the first record of Flagellospora stricta for the Americas.

Geniculospora inflata (Ingold) Sv. Nilsson ex Marvanová & Sv. Nilsson, Trans. Br. mycol. Soc. 57: 532, 1971. ( Figs. 4 J–K )

Material examined: — BRAZIL. Bahia: Piatã, Chapada Diamantina, on submerged leaves of Calophyllum brasiliense ( Calophyllaceae ), 18 December 2014, P. O. Fiuza s.n ( HUEFS 215970).

Conidiophores simple, septate, hyaline, 40–45 × 3–5 μm. Conidia tetraradiate, hyaline, consisting of a cylindrical geniculate main axis and 2 lateral branches attached at the point of main axis inflection. Main axis 108–176 × 4.5–5 μm, somewhat inflated at the point of branch attachment, branches slightly constricted at base, 70–131 × 4.5–6 μm, elements septate.

Geographical distribution:— Austria ( Marvanová & Gulis 2000); Canada ( Sokolski et al. 2006); England ( Ingold 1944); França ( Fabre 1998); Greenland ( Engblom et al. 1986); Hungary ( Gönczöl & Révay 2011); India (Sridhar et al. 1992); Pakistan ( Iqbal 1997); Portugal ( Pascoal et al. 2005); Spain ( Casado et al. 2015); USA ( Suberkropp & Wallace 1992).

Notes:— Geniculospora is represented by two well known species: G. grandis Greath. ex Nolan (1972: 1173) and G. inflata (type species). G. intermedia (R.H. Petersen) Sv. Nilsson ex Marvanová & Sv. Nilsson (1971: 532) ( Nolan 1972) is probably conspecific with G. inflata . The genus is characterized by hyaline, tetraradiate conidia with characteristically geniculate main axis, from the middle of which two other branches arise at the same level ( Nilsson 1964). Geniculospora grandis displays nearly concurrent development of 3 elements, so the conidium can be interpreted as having 3 terminal arms originating from a relatively short stalk (main axis); conidia of G. grandis are also considerably larger than in G. inflata ( Greathead 1961) . Geniculospora inflata is a new record to the Neotropics.

Figures

FIGURE 4. A. Dendrosporomyces prolifer: conidium; B. Dendrosporomyces splendens: conidium; C. Filosporella versimorpha: conidiophore and conidia; D. Flabellocladia tetracladia: conidium; E. Flabellospora crassa: conidium; F. Flabellospora multiradiata: conidium; G. Flabellospora verticillata: conidium; H. Flagellospora curvula: conidia, conidiophore and conidiogenous cells; I. Flagellospora stricta: conidia, conidiophore and conidiogenous cells; J–K. Geniculospora inflata: conidia. (Scale bar: A–B= 80 μm; C, E, G–H= 25 μm; D, J–K= 30 μm; F= 50 μm; I=10 μm)