Tetrapyrgos atrocyanea ( Métrod 1949: 140 ) E. Horak (1986: 102)

Reschke, Kai, Lotz-Winter, Hermine, Fischer, Christian W., Hofmann, Tina A. & Piepenbring, Meike, 2021, New and interesting species of Agaricomycetes from Panama, Phytotaxa 529 (1), pp. 1-26 : 19-20

publication ID

https://doi.org/ 10.11646/phytotaxa.529.1.1

DOI

https://doi.org/10.5281/zenodo.5814184

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scientific name

Tetrapyrgos atrocyanea ( Métrod 1949: 140 ) E. Horak (1986: 102)
status

 

Tetrapyrgos atrocyanea ( Métrod 1949: 140) E. Horak (1986: 102) View in CoL , Fig. 13h

Description:—Basidiocarps marasmioid. Pileus 0.8–1.2 cm diam., convex to plane, umbilicate, with rather straight margin, greyish yellow to olive yellow (2C3–5, 2D5–6) at central disk, paler, white with greyish-yellowish tinge towards the margin, surface covered by fine powdery, white flocks, sulcate-striate up to the centre. Lamellae broadly adnate to decurrent, medium spaced to rather distant, whitish, with somewhat uneven, concolorous edges, and intervenose ridges. Stipe 1.0–1.3 × 0.1 cm, cylindrical, straight, white, pale grey (21B1) to light grey (21C1) in immature basidiocarps, later dark grey, blackish (21F1 and darker) to bluish grey (21F2), paler bluish grey, medium grey to light grey (21D1– 2, 21E1–2) towards the tip, covered by white, powdery flocks. Base of the stipe often emerging from a dark, bluish grey mycelial disk. Odour indistinct, taste not tested.

Basidiospores 7.5–9.0–10.5 × 5.5–6.7–8.0 µm, Q = 1.10–1.35–1.70 (n = 30 spores of 1 specimen), tetrahedral, hyaline, thin-walled. Basidia 4-spored, clavate, hyaline, immature basidia often fusiform. Lamellar edge sterile. Cheilocystidia 30–42(–54) × 3.0–5.0 µm, diverticulate, sometimes septate, with knob-like apex. Pileipellis a ramealesstructure with strongly diverticulate end cells. Clamp connections abundant in all parts of the basidiocarp.

Habitat: —Basidiocarps solitary or in small, dense groups on woody litter, found on woody roots on a path in secondary vegetation in lowlands of Chiriquí Province, Panama.

Notes: — Tetrapyrgos atrocyanea is the type species of the genus Tetrapyrgos Horak. It was described from Madagascar by Métrod (1949) and an epitype was recently designated by Desjardin et al. (2017), together with a detailed description and molecular sequences. Tetrapyrgos atrocyanea has a wide distribution, in addition to Madagascar it is known from Benin ( Piepenbring et al. 2020), Bolivia, Brazil ( Komura et al. 2020), Costa Rica, and Puerto Rico ( Desjardin et al. 2017; Honan et al. 2015). Often, Tetrapyrgos specimens in the tropics and subtropics were referred to as Tetrapyrgos nigripes ( Fries 1838: 383) E. Horak ( Horak 1983; Piepenbring et al. 2018; Redhead 1989; Singer 1973). This species was described from North Carolina, USA, and has a white pileus, and in average shorter cheilocystidia than T. atrocyanea ( Honan et al. 2015) . ITS sequences corresponding to authentic specimens of T. nigripes from North Carolina and Tennessee, USA, have no matches with tropical or subtropical material ( Honan et al. 2015; Komura et al. 2020). Also, further, unpublished sequences of Tetrapyrgos specimens from Benin and Panama do not match those of authentic T. nigripes specimens.

Specimens examined: — PANAMA. Chiriquí Province: Los Algarrobos, trail to Río Majagua , 120 m a.s.l., border of the trail, 1 June 2017, K. Reschke KaiR331 (M-0312090) !; ibid., 5 June 2017, K. Reschke KaiR395 (M-0312091) !.

Desjardin, D. E., Perry, B. A., Shay, J. E., Newman, D. & Randrianjohany, E. (2017) The type species of Tetrapyrgos and Campanella (Basidiomycota, Agaricales) are redescribed and epitypified. Mycosphere 8: 977 - 985. http: // dx. doi. org / 10.5943 / mycosphere / 8 / 8 / 1

Fries, E. M. (1838) Epicrisis systematis mycologici, seu synopsis Hymenomycetum. Typographia Academica, Uppsala. 610 pp.

Honan, A. H., Desjardin, D. E., Perry, B. A., Horak, E. & Baroni, T. J. (2015) Towards a better understanding of Tetrapyrgos (Basidiomycota, Agaricales): new species, type studies, and phylogenetic inferences. Phytotaxa 231: 101 - 132. https: // doi. org / 10.11646 / phytotaxa. 231.2.1

Horak, E. (1983) Neufunde und Bemerkungen zu einem emendierten Gattungkonzept von Pterospora Metrod (Agaricales). Sydowia 36: 125 - 138.

Horak, E. (1986) Tetrapyrgos Horak (nom. et gen. nov.) replacing Pterospora Metrod (1949; nom. preocc.). Sydowia 39: 101 - 103.

Komura, D. L., Oliveira, J. J. S. D., Moncalvo, J. - M., Margaritescu, S. & Zartman, C. E. (2020) Six new species of Tetrapyrgos (Basidiomycota, Agaricales, Marasmiaceae) from the Brazilian Amazon. Phytotaxa 440: 193 - 214. https: // doi. org / 10.11646 / phytotaxa. 440.3.2

Metrod, G. (1949) Les mycenes de Madagascar (Mycena, Corrugia, Pterospora). Museum d'Histoire Naturelle de Paris. 146 pp.

Piepenbring, M., Lotz-Winter, H. & Hofmann, T. A. (2018) Incentives and challenges for mycologists in the tropics. Biosystematics and Ecology Series 34: 481 - 514.

Piepenbring, M., Macia-Vicente, J. G., Codjia, J. E. I., Glatthorn, C., Kirk, P., Meswaet, Y., Minter, D., Olou, B. A., Reschke, K., Schmidt, M. & Yorou, N. S. (2020) Mapping mycological ignorance - checklists and diversity patterns of fungi known for West Africa. IMA Fungus 11: 13. https: // doi. org / 10.1186 / s 43008 - 020 - 00034 - y

Redhead, S. A. (1989) A biogeographical overview of the Canadian mushroom flora. Canadian journal of botany 67: 3003 - 3062.

Singer, R. (1973) The genera Marasmiellus, Crepidotus and Simocybe in the neotropics. Beihefte Nova Hedwigia 44: 1 - 517.

Kingdom

Fungi

Phylum

Basidiomycota

Class

Agaricomycetes

Order

Agaricales

Family

Marasmiaceae

Genus

Tetrapyrgos