Cryptandromyces bibloplecti T.Majewski

Santamaria, Sergi & Pedersen, Jan, 2021, Laboulbeniomycetes (Fungi, Ascomycota) of Denmark, European Journal of Taxonomy 781, pp. 1-425 : 224-226

Cryptandromyces bibloplecti T.Majewski

MB#128600

Fig. 48

Acta Mycologica 25 (1): 43 ( Majewski 1990a). –

Type: “ On Bibloplectus ambiguus (Reich.) ( Coleoptera, Pselaphidae ): Bachus (Chelm voiv.), reserve Bachus I, section 71, Tilio–Carpinetum, bank of woodland lake , 5.6.1986, leg. T. Majewski ( TM. … 3623 – holotype)”; KRAM. [ Poland]

Diagnostic features

Thallus very small, up to 100 µm long. Appendage unbranched. Cells II and III ± parallel, separated by an almost vertical septum. Cell III in contact with cell I. [Detailed descriptions: Majewski 1994b; Santamaria 2003]

Distribution and hosts

Species known on Bibloplectus from the type locality ( Poland) and reported here from Denmark, on Plectophloeus from Spain ( Santamaria 2001a), and on an undetermined host from Belgium ( De Kesel et al. 2020). Probably also on Tychus Leach, 1817 (here reported). Hosts belong to Col. Staphylinidae Pselaphinae .

Collections examined from Denmark

On Bibloplectus ambiguus (Reichenbach, 1816) (Col. Staphylinidae Pselaphinae ) DENMARK – Lolland, Falster, Møn (LFM) • Nyord ; 55°2.885′ N, 12°12.380′ E; UB20; 27 Apr. 2013; JP 844; JP det.; ZMUC C-F-123339 .

On Tychus niger (Paykull, 1800) (Col. Staphylinidae Pselaphinae ) DENMARK – Sydsjaelland (SZ) • Østerskov ved Langebaek ; 54°59.572′ N, 12°6.715′ E; UA19; 3 Jan. 2019; JP 1295; JP det.; ZMUC C-F-123827 , C-F-123828 .

Remarks

First record from Denmark. Antheridia were not described in the protologue but their presence in the form of small phialides in upper inner corner of 2 nd and 3 rd cells of the appendage was suggested by Majewski (1994b). In some thalli from Bibloplectus ambiguus ( Fig. 48A, E , arrows), we have observed what seems to be efferent necks or their remains. This suggests that the appendicular cells may function directly as phialides. The occurrence of a trichogyne ( Fig. 48B , tr) supports the idea of the presence of antheridia.

Thalli collected on Tychus niger ( Fig. 48D, F–G ) have been provisionally classified as C. bibloplecti . These fungi do not differ substantially from those described on Bibloplectus and Plectophloeus . Scheloske (1969) reported Cryptandromyces elegans on Tychus from Germany without figures.

Figures

Fig. 48. Cryptandromyces bibloplecti T.Majewski. A. Mature thallus showing probable efferent necks of antheridia (arrow) and labelling of some thallial cells (I, II, III, VI, VII, and m). B. Immature thallus showing trichogyne (tr). C–D, G. Mature thalli. E. Paired mature thalli showing probably efferent neck of an antheridium (arrow). F. Perithecium in detail with labelling of cells VII, n’, and w 1–5. A–C, E. From Bibloplectus ambiguus. D, F–G. From Tychus niger. Scale bars: 20 µm. Photographs from slides ZMUC C-F-123339 (A–C, E), ZMUC C-F-123827 (D, F–G).