Stigmatomyces crassicollis Thaxt.

Santamaria, Sergi & Pedersen, Jan, 2021, Laboulbeniomycetes (Fungi, Ascomycota) of Denmark, European Journal of Taxonomy 781, pp. 1-425 : 255-256

Stigmatomyces crassicollis Thaxt.

MB#189218

Fig. 57A–F

Proceedings of the American Academy of Arts and Sciences 52: 661 ( Thaxter 1917). –

Type: “ On the abdomen and legs of species of Limosina . No. 1863 (Type) …, Balaclava ”; FH. [ Jamaica]

Stigmatomyces longicollis Thaxt. ( Thaxter 1917: 660) [MB#183955]

Stigmatomyces papuanus var. leiostoma Maire ( Maire 1920: 137) [MB#621908]

Stigmatomyces hackmanii Huldén ( Huldén 1983: 66) [MB#108566]

Diagnostic features

Basal cell of appendage slightly darkened, supporting a series of up to 12–13 flattened, oblique, outwards bulging cells, each bearing elongated antheridia on the inner side, except the distal cells which may be sterile. Perithecium with an oval venter and a well-distinguished, very elongate neck (about three times the length of the venter) which distally tapers to a distinct, slightly asymmetrical, pointed tip with four small lips. [Detailed descriptions: Thaxter 1931; Majewski 1994b; Weir & Rossi 1995; De Kesel & Hanssens 2007]

Distribution and hosts

Occurs on Leptocera ( Diptera Sphaeroceridae ) in a broad sense (including names like Limosina , Spelobia , Opalimosina Roháček, 1983 , Opacifrons Duda, 1918 , Kimosina Roháček, 1983 , Rachispoda Lioy, 1864 , Pseudocollinella Duda, 1924 , Terrilimosina Roháček, 1983 , Hackmanina Roháček, 1983 ); also on Limnophora Robineau-Desvoidy, 1830 ( Diptera Muscidae ) from Germany ( Rossi et al. 2013). Known from Europe ( Poland, Italy, Spain, United Kingdom), Jamaica, Bolivia, Algeria and New Zealand ( Majewski 2008). Reported later from Belgium ( De Kesel & Hanssens 2007), Slovakia ( Rossi et al. 2010), Costa Rica, Germany and Portugal ( Rossi et al. 2013).

Collections examined from Denmark

On Leptocera fontinalis (Fallen, 1826) ( Diptera Sphaeroceridae ) DENMARK – Nordøstsjaelland (NEZ) • Brønshøj ; 55°42.234′ N, 12°30.135′ E; UB47; 30 Aug. 2019; JP 1509; V. Michelsen det.; ZMUC C-F-124097 • Kongelunden ; 55°34.369′ N, 12°34.189′ E; UB46; 31 Mar. 2009; W. Gritsch Dry0004; W. Gritsch det.; ZMUC C-F-124017 .

On Spelobia cf. luteilabris (Rondani, 1880) ( Diptera Sphaeroceridae ) DENMARK – Nordøstsjaelland (NEZ) • Svenskeholm ; 55°36.123′ N, 12°31.715′ E; UB46; 9–14 May 2018; W. Gritsch 1205; W. Gritsch det.; ZMUC C-F-123732 .

On Spelobia luteilabris (Rondani, 1880) ( Diptera Sphaeroceridae ) DENMARK – Nordøstsjaelland (NEZ) • Bagsvaerd (Skovsøen 15); 55°45.526′ N, 12°25.121′ E; UB38; 28 Feb. 1959; L. Lyneborg Dry0005; J. Rohacek det.; ZMUC C-F-124018 .

On Spelobia rufilabris (Stenhammer, 1855) ( Diptera Sphaeroceridae ) DENMARK – Nordøstjylland (NEJ) • Nordmarken, Laesø ; 57°18.919′ N, 11°4.819′ E; PJ25; 11 Jul. 1969; Zool. Mus. Exp. DrY0006; V. Michelsen det.; ZMUC C-F-124019 .

Remarks

First record from Denmark. Highly variable, especially as a function of growing on different parts of the host body, and perhaps a collective species. Stigmatomyces hackmanii was accepted as a separate species by Majewski (1994b) according to differences in the arrangement and shape of perithecial basal cells and cell III, although these supposedly differential characteristics were not depicted in his illustrations.

Figures

Fig. 57. Stigmatomyces spp. A–F. S. crassicollis Thaxt. A–D. Mature thalli, from Leptocera fontinalis (A–B), from Spelobia luteilabris (C), and from Spelobia rufilabris (D). E–F. Primary appendages in detail. – G–K. S. divergatus Thaxt. G–I. Mature thalli. J. Primary appendage in detail. K. Perithecial tip in detail. Scale bars: 50 µm. Photographs from slides ZMUC C-F-124097 (A, E), ZMUC C-F-124017 (B, F), ZMUC C-F-124018 (C), ZMUC C-F-124019 (D), ZMUC C-F-123720 (G–H, J–K), ZMUC C-F- 123717 (I).