Tanmaurkiella huggertii Santam., 2021

Santamaria, Sergi & Pedersen, Jan, 2021, Laboulbeniomycetes (Fungi, Ascomycota) of Denmark, European Journal of Taxonomy 781, pp. 1-425 : 272-274

Tanmaurkiella huggertii Santam. gen. et sp. nov.

MB#840612

Fig. 63

Diagnosis

Axis moniliform, flexuous, cells ± inflated, separated by constricted septa. Perithecium broadly ovoidal. Trichogyne stump reduced to a minute knob ( Fig. 63D , ts).

Etymology

The species is named after Lars Huggert, a Swedish student of Laboulbeniales , because he was the first one who discovered it, although he did not describe it formally ( Huggert 2010).

Type material

Holotype DENMARK – Østjylland (EJ) • On Pselaphus heisei Herbst, 1792 (Col. Staphylinidae Pselaphinae ); Serup Skov ; 56°14.504′ N, 9°28.051′ E; NH23; 26 Mar. 2017; JP 240; JP det.; ZMUC C-F-122720 .

Description

Thallus pale yellowish, shady in the perithecium. Basal cell of the receptacle (I) obconical, with a pointed hyaline beak at the base ( Fig. 63A , arrow), two or more times as long as broad. Suprabasal cell of the receptacle (II) may be subdivided into three or more cells, where the perithecium develops from the second or third cell, or from any cell above if additional perithecia are formed ( Fig. 63C ); these cells originating from division of cell II are very variable in shape, broader than long or vice versa.

Appendage unbranched, very elongated, moniliform, flexuous, far exceeding the perithecial apex, starting with the cell bearing perithecium consisting of up to 20 superposed cells. Lower cells of appendage inflated, separated by constricted septa, very variable in length/width ratio; upper cells of appendage gradually longer and narrowing towards the distal area. Antheridia unknown.

Perithecial stalk cell (VI) small, rounded, flattened to isodiametric, separated from cell II that gave rise to it by a vertical septum. Perithecium broadly ovoidal, with an inflated venter and a short, nearly undistinguished neck. Perithecial basal cells flattened, occupying a narrow section below the venter. Perithecial tip rounded, showing four preapical protuberances which form a crown-like structure around the ostiolar area ( Fig. 63F–G ).

Length from foot to apex of perithecium 111–128 µm. Perithecium (including basal cells) 67–71 × 36–39 µm. Length from foot to appendage apex 235–283 µm.

Thalli were found on the elytra and dorsal tergites of the host. The host was sifted from mice-nests and moist moss and leaf litter in and around Carex paniculata L. tussocks at a sun-exposed spring.

Remarks

This species is very similar to the other species of the genus but may be separated from it by the shape of the perithecium, the perithecial apex, the shape of the appendage cells (non inflated versus inflated), and the axis outline. Its presence in Sweden should be confirmed (see above under etymology).

Figures

Fig. 63. Tanmaurkiella huggertii Santam. gen. et sp. nov. A–B. Mature thalli. In A, the pointed hyaline beak at the base of the foot is labelled (arrow). C. Mature thallus with a second young perithecium. D–E. Perithecium in detail, at two focus levels, near (D) and far (E), to show perithecial wall cells (w n) developed from cell “n”, cells n’, VII and trichogyne scar (ts). F–G. Perithecial tip in detail at near (F) and far (G) focus to show the four preapical protuberances. Scale bars: A–C = 50 µm; D–G = 20 µm. Photographs from slide ZMUC C-F-122720 (holotype).