Hydrophilomyces coneglianensis Speg.

In acetic carmine

THALLUS yellowish except for the amber-brown venter of perithecium, represented by two growth forms, A and B.

Thallus of the form A 330-600 µm long.

Thallus of the form B 255-420 µm.

In acetic carmine

RECEPTACLE (r) consists of 9-11 cells; basal cell (rscI) small, obtriangular; 2-4 superposed cells flattened, cutting off long buffer cells (bc), rounded at the apex; other cells flattened or, in the upper part of the receptacle, more or less elongated; foot (f) dark-coloured.

Receptacle of the form A straight or nearly straight, 135-310 µm long; stalk cell of perithecium (scp) usually elongated.

Receptacle of the form B bent, 120-220 µm, stalk cell of perithecium frequently less or more flattened.

In acetic carmine

APPENDAGE (app) up to 330 µm long, consists of 17-27 isodiametric or flattened cells, with the distal cell narrowing, continuing into a primary branchlet; most of the cells of the appendage cut off one or two corner cells on its interior side; these cells give rise to short branchlets (b) terminating in 1-3 slender antheridia, which frequently proliferate into longer simple branchlets.


In acetic carmine

PERITHECIA (p) with the neck (np) as long as the venter; stalk cell subtending the perithecium (scp) usually isodiametric; of two forms, A and B.

Perithecia of the form A slender, 185-225 x 45-60 µm, with a strongly bent neck.

Perithecia of the form B 190-220 x 50-70 µm, with an inflated venter and a straight neck.

In acetic carmine

SPORES (s) 63-68 x 3 µm.



HOST AND DISTRIBUTION. The host of the specimens characterized here was Laccobius minutus (Linnaeus) (Coleoptera, Dytiscidae). In Poland, H. coneglianensis has also been found on L. bipunctatus (Fabricius) (Majewski 1994). Apart from Poland, this fungus has been recorded in Germany and Italy (Majewski 1994).

NOTES. The formation of the morphologically different forms A or B depends on the sex of the host (Majewski 1994).


Majewski T. 1994. The Laboulbeniales of Poland. Polish Bot. Stud. 7, 3-466.