Pyxine berteriana (Fée) Imshaug, Trans. Amer. Microsc. Soc.

Mongkolsuk, Pachara, Meesim, Sanya, Poengsungnoen, Vasun & Kalb, Klaus, 2012, The lichen family Physciaceae in Thailand-I. The genus Pyxine, Phytotaxa 59 (1), pp. 32-54 : 37-38

publication ID

https://doi.org/ 10.11646/phytotaxa.59.1.2

DOI

https://doi.org/10.5281/zenodo.5061778

persistent identifier

https://treatment.plazi.org/id/039EDF55-FFC8-1F65-A39E-F984FBCD78A2

treatment provided by

Felipe

scientific name

Pyxine berteriana (Fée) Imshaug, Trans. Amer. Microsc. Soc.
status

 

Pyxine berteriana (Fée) Imshaug, Trans. Amer. Microsc. Soc. 76: 254 (1957).

Type:— Circinaria berteriana Fée, Essai cryptog. écorces officin.: 128 (1825). Holotype:—Insula Martinicensi [ Martinique], ad corticem Quassiae excelsae (G!) — Pyxine meissneri Tuck. ex Nyl., Ann. Sci. Nat. ; Bot., sér. 4, 11: 205 (1859). Lectotype (selected by Imshaug 1957: 254):— Cuba, C. Wright, Wright, Lich. ins. Cubae exs. 95 ( FH!) = Pyxine cocoës var. meissneri (Tuck. ex Nyl.) Tuck., Proc. Amer. Acad. Arts Sci. 12: 166 (1877).— Pyxine meissneri var. rinodinoides Vain., Ann. Acad. Sci. Fenn. A (6): 69. Holotype:—[Lesser Antilles] Insula S. Jan, ad corticem arboris prope Coral-Bay (Caroline), 22 February 1906, Raunkiaer 443 (C, fide Jungbluth 2010).

Thallus corticolous, 5–9 cm wide, adnate to tightly adnate. Lobes radiating, discrete to ± contiguous, plane to convex, but often slightly concave towards the tips, 0.3–1.3 mm wide, subrotund at the apices. Upper surface white to light grey, greenish grey or yellow-grey, sparsely pruinose at the lobe tips (pruina punctiform) or epruinose; polysidiangia, isidia and soredia absent. Pseudocyphellae distinct, marginal and laminal, subreticulate. Medulla upper part: (pale) yellow, lower part: white. Lower surface black in the centre, paler towards the margin; rhizines ± dense, furcate. Apothecia common, cocoës - type, 0.5–2.0 mm wide; disc epruinose. Internal stipe distinct, white, K-, P-, C-, KC-. Ascospores 15–20 × 6–7 μm. Pycnidia rare, immersed in small warts on thallus with an exposed black ostiolum; conidia 4–5 × 1–1.1 µ m.

Chemistry: Cortex K-, UV + yellow; medulla upper part K+ distinctly orange to yellow, C-, KC-, P+ orange, lower part: all spot tests negative; containing lichexanthone (major), terpenes (major or minor), unknown pigment (minor or trace).

Distribution and habitat:—Pantropical and common in North, Central and South America, Africa, Australia, New Caledonia and the Galapagos Islands.

Notes:—This species is characterized by the presence of cortical lichexanthone, the absence of vegetative propagules, the yellow upper medulla (white below) and apothecia of the cocoës- type and a white internal stipe. It is often confused with P. australiensis ( Kalb 1994:61) , but that species has narrower lobes, a uniformly yellow medulla and apothecia of the obscurascens - type. Also similar is the Neotropical P. endolutea Kalb ( Kalb 1987: 49), but this species is readily separated by the presence of atranorin (UV-). Although this species has not yet been reported for Thailand, we have added a description for convenience. Most of the herbarium material which was labelled P. berteriana was revised to P. cognata which is easily separated by its orange medulla (upper part) and obscurascens - type apothecia.

FH

Fort Hays

UV

Departamento de Biologia de la Universidad del Valle

Kingdom

Fungi

Phylum

Ascomycota

Class

Lecanoromycetes

Order

Teloschistales

Family

Physciaceae

Genus

Pyxine

Loc

Pyxine berteriana (Fée) Imshaug, Trans. Amer. Microsc. Soc.

Mongkolsuk, Pachara, Meesim, Sanya, Poengsungnoen, Vasun & Kalb, Klaus 2012
2012
Loc

Pyxine berteriana (Fée) Imshaug, Trans. Amer. Microsc. Soc.

Imshaug 1957: 254
1957
Loc

Pyxine cocoës var. meissneri (Tuck. ex Nyl.) Tuck., Proc. Amer. Acad. Arts Sci.

Tuck. 1877: 166
1877