Monoicomyces britannicus Thaxt.
publication ID |
https://doi.org/ 10.5852/ejt.2021.781.1583 |
DOI |
https://doi.org/10.5281/zenodo.14370722 |
persistent identifier |
https://treatment.plazi.org/id/03D3878A-B61D-FEB4-6719-79C2DE12FED3 |
treatment provided by |
Felipe |
scientific name |
Monoicomyces britannicus Thaxt. |
status |
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Monoicomyces britannicus Thaxt. View in CoL
MB#192361
Figs 82 View Fig , 83A View Fig
Proceedings of the American Academy of Arts and Sciences 35: 413 ( Thaxter 1900, as M. brittanicus View in CoL ). –
Type: “ On Homalota insecta Thorn. , British Museum, No. 454, Hammer smith, England. On superior surface of abdomen”; FH.
Diagnostic features
Primary appendage usually branched once above the basal cell, rarely simple, with the dorsal branch deeply blackish-brown near the base. Cell III inflated, large, pale, in contact with cell I and separated from cell II by a ± vertical or oblique septum ( Fig. 82C–D View Fig ). Two to four secondary appendages for each antheridium. Each antheridium including four phialides ( Fig. 82E–F View Fig , arrows). [Detailed descriptions: Thaxter 1908; Santamaria 1989]
Distribution and hosts
Reported on Atheta (in part as Homalota Mannerheim, 1831 ) from Europe: Finland, France, Germany, Italy, Poland, Spain, United Kingdom, Russia ( Santamaria et al. 1991), Hungary ( Bánhegyi et al. 1985), Belgium ( De Kesel & Haghebaert 1991), Greece ( Castaldo et al. 2004), Latvia ( De Kesel & Krastina De Kesel 2006), Sweden ( Huggert 2010), and the Netherlands (Haelewaters et al. 2014).
Collections examined from Denmark
On Acrotona aterrima (Gravenhorst, 1802) (Col. Staphylinidae Aleocharinae ) DENMARK – Nordøstjylland (NEJ) • Vandplasken ved Kaersgård Strand ; 57°31.199′ N, 9°53.070′ E; NJ57; 21 Nov. 2017; JP 806; JP det.; ZMUC C-F-123301 GoogleMaps .
On Acrotona fungi (Gravenhorst, 1806) (Col. Staphylinidae Aleocharinae ) DENMARK – Nordvestsjaelland (NWZ) • Flyndersø ved Dybesø ; 55°58.151′ N, 11°45.621′ E; PH60; 4 Nov. 2017; JP 723; JP det.; ZMUC C-F-123216 GoogleMaps .
On Acrotona pseudotenera (Cameron, 1933) (Col. Staphylinidae Aleocharinae ) DENMARK – Østjylland (EJ) • Kjellerup ; 56°17.644′ N, 9°25.850′ E; NH23; 16 Feb. 2018; JP 975; JP det.; ZMUC C-F-123482 GoogleMaps . – Lolland, Falster, Møn (LFM) • Hobyskov ; 54°44.069′ N, 11°15.296′ E; PF46; 7 Jan. 2018; JP 956; JP det.; ZMUC C-F-123462 GoogleMaps . – Nordvestjylland (NWJ) • Legind ; 56°45.832′ N, 8°48.782′ E; MH89; 19 Oct. 2008; JP 80; JP det.; ZMUC C-F-122555 GoogleMaps . – Sydsjaelland (SZ) • Gammel Kalvehave ; 54°59.745′ N, 12°8.232′ E; UA19; 27 Apr. 2018; JP 1087; JP det.; ZMUC C-F-123605 GoogleMaps .
On Acrotona sp. (Col. Staphylinidae Aleocharinae ) DENMARK – Nordøstsjaelland (NEZ) • Brønshøj ; 55°42.234′ N, 12°30.135′ E; UB47; 2 Jul. 2012; JP 38; JP det.; ZMUC C-F-122513 GoogleMaps .
On Aloconota sulcifrons (Stephens, 1832) (Col. Staphylinidae Aleocharinae ) DENMARK – Østjylland (EJ) • Klostermølle ; 56°2.432′ N, 9°41.629′ E; NH41; 14 Feb. 2019; JP 1349; JP det.; ZMUC C-F-123888 GoogleMaps .
On Atheta longicornis (Gravenhorst, 1802) (Col. Staphylinidae Aleocharinae ) DENMARK – Nordvestsjaelland (NWZ) • Klintebjerg ved Klint ; 55°57.351′ N, 11°34.463′ E; PH60; 1 May 2016; JP 56; JP det.; ZMUC C-F-122531 . – GoogleMaps Sydsjaelland (SZ) • Gammel Kalvehave ; 54°59.745′ N, 12°8.232′ E; UA19; 24 Mar. 2018; JP 1012; JP det.; ZMUC C-F-123519 GoogleMaps .
On Atheta volans (Scriba, 1859) (Col. Staphylinidae Aleocharinae ) DENMARK – Sydsjaelland (SZ) • Tryggevaelde Å ved Varpelev ; 55°21.055′ N, 12°15.877′ E; UB23; 6 Jan. 2018; JP 973; JP det.; ZMUC C-F-123480 GoogleMaps .
Remarks
First record from Denmark. Very often, cell II is difficult to distinguish because it is flat and wedgeshaped. In front view it appears almost concealed behind cell I and below cell III ( Fig. 82D View Fig ). In side view, the disposition of cells I, II and III is a characteristic that easily distinguishes M. britannicus from M. homalotae ( Fig. 82C–D View Fig ).
Thaxter (1908), when describing M. britannicus , wrote “too nearly related to M. homalotae , and may prove to be only a variety” and “general structure as in M. homalotae , the third cell of the primary appendage suffused with blackish brown, somewhat constricted below”. Likely, Thaxter refers to the third cell of the receptacle or to the basal cell of the appendage.
Distinctiveness of M. britannicus from M. homalotae was questioned by Majewski (1994b) who considered the differences between the two species irrelevant and included M. britannicus among the synonyms of M. homalotae describing the latter with very broad characteristics.
The first author (SS) has studied the types of both species several years ago; in 1990 the type slide of M. britannicus (labelled FH2352) was borrowed from FH ( Fig. 83A View Fig ). The type slide contained only one thallus, as illustrated by Thaxter (1908). Although the photographs of the types are old and of low quality, we reproduce them here for its documentary interest ( Fig. 83A–B View Fig ). An extended discussion appears below under the remarks of M. homalotae .
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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Monoicomycetoideae |
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