Pleosporales » Lindgomycetaceae » Lindgomyces

Lindgomyces apiculatus

Lindgomyces apiculatus K. Hiray. & Kaz. Tanaka

 

Index Fungorum number: IF561162

Etymology: From the L. apiculatus, in reference to the position and shape of ascospore appendages.

Holotype: HHUF 28988

 

Sexual morph: Ascomata 300–330 μm high, 320–340 μm diam, gregarious, immersed to erumpent, subglobose to globose, black, ostiolate. Ostiole central, rounded. Beak absent or short papillate. Ascomal wall 25–30 μm thick, composed of 5–7 layers of rectangular to polygonal thin-walled cells, 6–10 × 4–5 μm. Pseudoparaphyses numerous, 2–4 μm wide, septate, hyaline, branched, associated with gelatinous material. Asci 85–125 × 17–25(–27) μm (av. 103.2 × 21.5 μm, n = 21), fissitunicate, cylindrical to clavate, rounded at the apex, with or without an apical chamber, with eight overlapping biseriate to triseriate ascospores. Ascospores (31–)33–43 × 8–11 μm (av. 36.4 × 9.5 μm, n = 50), L/W 3.1–4.2(–4.5) (av. 3.8, n = 50), fusiform to clavate with acute ends, slightly curved, one-septate, with the primary septum almost median (0.45–0.55; av. 0.51, n = 50), constricted at primary septum, with broad upper cell, hyaline, smooth, guttulate, with short terminal appendages 2–5 μm long. Sexual morph: Undetermined (Description from Raja e al. 2011)

 

Specimens examined: JAPAN. Aomori, Hirosaki, Aoki, Mohei-pond, 140^o26.39’E, 40^o34.19’N, on submerged twigs of woody plant, 3 May 2003, KT 1108 (HHUF 28988, HOLOTYPUS designated here; single ascospore isolate JCM 13091 5 MAFF 239601); 17 May 2003, KT 1144 (HHUF 28991; single ascospore isolate JCM 13092 5 MAFF 239602); 28 Jun 2003, KT 1263 (HHUF 28992); 19 Jul 2003, KT 1307A (HHUF 28993); 27 Sep 2003, KT 1495 (HHUF 28995); 25 Oct 2003, KT 1531 (HHUF 28996).

 

Freshwater distribution: Japan (Raja et al. 2011)

 

Notes: The morphological features of Lindgomyces apiculatus agree with the generic characters of Lindgomyces: globose ascomata, cylindrical to clavate asci, and hyaline, one-septate ascospores. Lindgomyces apiculatus has fusiform ascospores with acute ends, with a short terminal appendage at each apex. These ascospore features are similar to those of L. breviappendiculatus. However, the ascospore dimensions of L. apiculatus are smaller, (31–) 33–43 3 8–11 μm vs. (40–)44–60(–63.5) × (9.5–)11–17.5 μm), than those of L. breviappendiculatus (Tanaka et al. 2005b). In addition, molecular data (SSU + LSU nrDNA) based on Raja et al. (2011), as well as nuclear ribosomal ITS data, clearly indicate that L. apiculatus is a phylogenetically distinct species. (Notes from Raja e al. 2011)

 

Figs. 3–14. Lindgomyces apiculatus (From HOLOTYPE. HHUF 28988). 3, 4. Ascomata on host surface. 5, 6. Ascoma in longitudinal section. 7. Pseudoparaphyses. 8. Asci. 9–14. Ascospores (arrowheads indicate sheath of ascospore). Bars: 3 = 1000 μm; 4 = 200 μm; 5 = 100 μm; 6 = 25 μm; 7, 9–13 = 10 μm; 8 = 30 μm; 14 = 50 μm. (Raja et al. 2011; https://www.inhs.illinois.edu/files/7513/4282/1971/Lindgomyces_Raja_et_al_Mycologia_2011.pdf)

 

References

Raja HA, Tanaka K, Hirayama K, Miller AN, Shearer CA (2011) Freshwater ascomycetes: Two new species of Lindgomyces (Lindgomycetaceae, Pleosporales, Dothideomycetes) from Japan and USA. Mycologia 103:1421–1432. https://doi.org/10.3852/11-077

 

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