Baltazaria octopodites (Corner) C.A. Leal-Dutra, Dentinger & G.W. Griff.

Leal-Dutra, Caio A., Neves, Maria Alice, Griffith, Gareth W., Reck, Mateus A., Clasen, Lina A. & Dentinger, Bryn T. M., 2018, Reclassification of Parapterulicium Corner (Pterulaceae, Agaricales), contributions to Lachnocladiaceae and Peniophoraceae (Russulales) and introduction of Baltazaria gen. nov., MycoKeys 37, pp. 39-56: 40

publication ID

http://dx.doi.org/10.3897/mycokeys.37.26303

persistent identifier

http://treatment.plazi.org/id/890A7DB3-F027-B4B2-BEE0-DE095C91A735

treatment provided by

MycoKeys by Pensoft

scientific name

Baltazaria octopodites (Corner) C.A. Leal-Dutra, Dentinger & G.W. Griff.
status

comb. nov.

Baltazaria octopodites (Corner) C.A. Leal-Dutra, Dentinger & G.W. Griff.  comb. nov. Fig. 3

Basionym.

Parapterulicium octopodites  Corner, Ann. Bot., 16: 286 (1952)

Description.

Basidiomes resupinate (Fig. 3b), 0.1-0.5 mm thick, membranaceous, covering leaves and twigs, hymenophore smooth, white (2.5Y 8/2) to pale yellow (2.5Y 8/4), forming rhizomorph-like structures up to 7 cm high and scarcely to profusely branched that may be confused with coralloid basidiomes (Fig. 3a, b).

Substrate: On dead twigs and leaves.

Hyphal system dimitic, profusely interwoven. Generative hyphae 2-5 μm wide, thin-walled, without clamps. Skeletal hyphae 2-6 μm (up to 10 μm in KOH) wide, walls dextrinoid, up to 1.5 μm thick, strongly swelling in KOH (up to 4.5 μm). Termini of hymenial skeletal hyphae papillate, presenting short protuberances 2-10 × 1.5-2.5 μm, sometimes ramified resembling skeletodendrohyphidia.

Putative hymenium with abundant basidioles up to 25 × 6 μm, clavate, growing immersed in the papillate hyphae.

Gloeocystidia up to 80 × 8-14 μm, clavate to lanceolate, thin-walled, densely multiguttulate or with abundant granular contents. Present in all parts of the basidiomes, including the corticioid form.

Basidiospores and basidia not observed.

Specimens examined.

Brazil. Rio Grande do Sul: no date, J. Rick (holotype: BPI 333063). São Paulo: Apiaí, Parque Estadual Turístico do Alto Ribeira, growing on the ground in rainforest litter, 14-15 Dec. 2014, M.A. Reck 1003/14, 1069/14 (FLOR 56442, FLOR 56449). Santa Catarina: Florianópolis, UCAD, 9 Jan. 2015, G. Flores 14 (FLOR 56460). Paraná: Foz do Iguaçú, Parque Nacional do Iguaçú, Trilha da torre, 22 Jan. 2017, C.A.T. Oliveira 160 (FLOR 63715). Amazonas: Rio Preto da Eva, ARIE-PDBFF - Reserva do Km 41, 17 Mar. 2017, C.A. Leal-Dutra, L.A. Clasen, Q.V. Montoya, O. Pereira 170309-26 (INPA 280140).

Distribution.

Brazil. Rio Grande do Sul: São Leopoldo (Corner, 1952a; Type). São Paulo: Apiaí. Santa Catarina: Florianópolis. Paraná: Foz do Iguaçu. Amazonas: Rio Preto da Eva (this study).

Notes.

The dimitic hyphal system, the papillate surface at the ends of the skeletal hyphae and the gloeocystidia agree perfectly with Corner’s original descriptions ( Corner 1952a). Corner (1952a) described this species from a collection where no fertile structures were observed; the new collections were also sterile. As no spores or fertile basidia were found, the term putative hymenium is given to the region with abundant basidiole-like structures. Furthermore, the lack of sexual characters observed in B. octopodites  , combined with the undeveloped binding-skeletal hyphae, might indicate that this species is only known by young basidiomes or non-reproductive growth forms (i.e. explorative rhizomorphs). This is the first record of B. octopodites  from the States of Amazonas, Paraná, Santa Catarina and São Paulo.

Kingdom

Fungi

Phylum

Arthropoda

Class

Insecta

Order

Agaricales

Family

Pterulaceae

Genus

Baltazaria