name | Limacella myochroa | ||||||||
author | Pegler. 1983. Kew Bull. Addit. Series 9: 296, Fig. 53 (g-h), Pl. 6 (E-F). | ||||||||
name status | nomen acceptum | ||||||||
english name | "Martinique Vanguard Limacella" | ||||||||
MycoBank nos. | 109056 | ||||||||
GenBank nos. |
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holotypes | K | ||||||||
intro |
The following text may make multiple use of each data field. The field may contain magenta text presenting data from a type study and/or revision of other original material cited in the protolog of the present taxon. Macroscopic descriptions in magenta are a combination of data from the protolog and additional observations made on the exiccata during revision of the cited original material. The same field may also contain black text, which is data from a revision of the present taxon (including non-type material and/or material not cited in the protolog). Paragraphs of black text will be labeled if further subdivision of this text is appropriate. Olive text indicates a specimen that has not been thoroughly examined (for example, for microscopic details) and marks other places in the text where data is missing or uncertain. The following material is derived from the protolog of the present taxon. | ||||||||
pileus | from protolog: 20 - 50 mm wide, Blackish Mouse Gray (M.10/YR;2.5/0.3), over disc fading at maturity to Smoke Gray (M.3Y/6.0/10.) or Drab Gray (M.9YR/6.6/1.2), at first ovoid, soon broadly convex-campanulate to applanate but with the margin remaining decurved, subglutinous when moist, cracking on drying and revealing underlying context; context white; margin weakly plicate-sulcate, often appendiculate with fragments of partial veil. | ||||||||
lamellae | from protolog: adnexed, subcrowded, white, more or less ventricose, 3 - 6 mm broad; lamellulae "of two lengths." | ||||||||
stipe | from protolog: 45 - 80 × 4 - 5 mm, whitish, cylindric or narrowing toward base, flexuous, intially covered with scattered white velar squamules, arising from white basal mycelium; context solid; partial veil superior, white, fragile, narrow. | ||||||||
odor/taste | from protolog: Odor strongly farinaceous. Taste not recorded. | ||||||||
macrochemical tests |
none recorded. | ||||||||
pileipellis | double click in markup mode to edit. | ||||||||
hymenial trama |
from protolog: distinctly bilateral; central stratum prominent; filamentous hyphae 1.5 - 20 μm wide, hyaline, thin-walled. [Note: It would be useful to know what is meant by filamentous hyphae inflated to 20 μm wide. This could be an intercalary or terminal cell.—ed.] | ||||||||
subhymenium | from protolog: pseudoparenchymatous, very broad, 20 - 28 μm wide. | ||||||||
basidia | from protolog: 27 - 35 × 7 - 8 μm, 4-sterigmate. | ||||||||
gluten layer |
from protolog: with gluten supporting filamentous hyphae 1.5 -3.5 μm wide, short, erect or semi-erect, sometimes interwoven, "arising from narrow glutinous hypodermium of gelatinized hyphae 4 - 8 μm wide." [Note: Described incorrectly in the protolog as a "pileipellis."—ed.] | ||||||||
stipe context | not described. | ||||||||
partial veil |
from protolog: filamentous hyphae 3.5 - 24 μm wide, thin-walled, inflated; clamp connections present. [Note: It would be useful to know more about this tissue. For example, are the inflated cells intercalary? terminal? both?—ed.] | ||||||||
lamella edge tissue | from protolog: fertile. | ||||||||
basidiospores | from protolog: [-/-/-] 5 - 6 × 4 - 5 μm, (L' = 5.4 ± 0.32 μm; W' = 4.6 &plumn; 0.27 μm; est. Q = 1.09 - 1.25; Q' = 1.17), hyaline, smooth, inamyloid, subglobose to broadly ellipsoid; apiculus not described; contents not described; off-white in deposit. | ||||||||
ecology | from protolog: At 5 - 150 m elev. In large numbers. On soil in thick mesophytic secondary woods or in dedgraded primary mesophytic forest. | ||||||||
material examined | from protolog: MARTINIQUE: Morne Croix, Rivail [150 m], 9.viii.1975 J. P. Fiard 293B (holotype, K); Bois de la Pointe Rouge [5 m], 17.viii.1976 J. P. Fiard 293E (??). | ||||||||
discussion |
from protolog: "This species occurs in large numbers in Martinique, especially in the deep humus of thick mesophytic forests. It may be distinguished from all other species of Limacella by virtue of the grey pigmentation on the pileus, and belongs in sect. Limacella with a dry, non-glutinous surface to the stipe. It shows some similarity to L. guttata... with a persistent, membranous annulus, differing in pigmentation and in the larger spores. ...." The rather brief discussion appears to be in error on some points. There are certainly taxa in Limacella with gray pigmentation on the pileus; and the spores reported for the present species are not larger than those from European specimens of Limacellopsis. guttata revised by RET. This raises the question of whether the small-spored (3.7 - 4.7 × 3.2 - 4.5 μm) material is correctly identified. The following diagram provides a sporograph comparison of the European species' spores with Pegler's data for L. myochroa and RET's estimate of the range of Q for the present species. Apparently a type study of this species would be valuable. | ||||||||
citations | —R. E. Tulloss | ||||||||
editors | RET | ||||||||
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