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Entoloma subgenus Leptonia in boreal-temperate Eurasia: towards a phylogenetic species concept.

Morozova OV, Noordeloos ME, Vila J - Persoonia (2014)

Bottom Line: Leptonia as well as the new sect.On the basis of the morphological and phylogenetical evidence E. alnetorum is reduced to a variety of E. tjallingiorum, and E. venustum is considered a variety of E. callichroum.Neotypes for E. dichroum, E. euchroum and E. lampropus are designated.

View Article: PubMed Central - PubMed

Affiliation: Komarov Botanical Institute, 197376, 2 Prof. Popov Str., St Petersburg, Russia;

ABSTRACT
This study reveals the concordance, or lack thereof, between morphological and phylogenetic species concepts within Entoloma subg. Leptonia in boreal-temperate Eurasia, combining a critical morphological examination with a multigene phylogeny based on nrITS, nrLSU and mtSSU sequences. A total of 16 taxa was investigated. Emended concepts of subg. Leptonia and sect. Leptonia as well as the new sect. Dichroi are presented. Two species (Entoloma percoelestinum and E. sublaevisporum) and one variety (E. tjallingiorum var. laricinum) are described as new to science. On the basis of the morphological and phylogenetical evidence E. alnetorum is reduced to a variety of E. tjallingiorum, and E. venustum is considered a variety of E. callichroum. Accordingly, the new combinations E. tjallingiorum var. alnetorum and E. callichroum var. venustum are proposed. Entoloma lepidissimum var. pauciangulatum is now treated as a synonym of E. chytrophilum. Neotypes for E. dichroum, E. euchroum and E. lampropus are designated.

No MeSH data available.


a–c: Entoloma dichroum. a. LE227472 (photo taken at the neotype locality); b. herbarium SGC; c. JVG 1070821-4. — d. E. eugenei LE 253771, holotype. — e, f. E. allochroum LE254324. — Scale bars = 1 cm. — Photos by: a, d. O. Morozova; b. S. Català; c. J. Vila; e, f. K. Potapov.
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Figure 17: a–c: Entoloma dichroum. a. LE227472 (photo taken at the neotype locality); b. herbarium SGC; c. JVG 1070821-4. — d. E. eugenei LE 253771, holotype. — e, f. E. allochroum LE254324. — Scale bars = 1 cm. — Photos by: a, d. O. Morozova; b. S. Català; c. J. Vila; e, f. K. Potapov.

Mentions: Although sect. Dichroi has few species, it, however, forms a clearly distinct group. Morphologically it includes species with very pronounced, sharply angled spores such as E. dichroum and E. eugenei. Entoloma allochroum, of uncertain phylogenetic position, is the only other species with similar spores. Section Dichroi is also distinguished genetically by the presence of large insertions in the ITS1 region (282 bp). ITS region in E. dichroum is rather variable, but the p-distance between the specimens studied does not exceed 2 %. Morphological intraspecific variability in E. dichroum is also pronounced (as the variation in colour of the pileus) (Fig. 17a–c). Entoloma dichroum was described by Persoon in 1801. As the holotype does not exist and the type locality is unknown we selected a neotype from the available material. We studied 8 collections previously identified as E. dichroum, and only 4 of them correspond to the current concept of this species. We selected therefore LE227472 (Zhiguli, Russia) as it fits best the protologue.


Entoloma subgenus Leptonia in boreal-temperate Eurasia: towards a phylogenetic species concept.

Morozova OV, Noordeloos ME, Vila J - Persoonia (2014)

a–c: Entoloma dichroum. a. LE227472 (photo taken at the neotype locality); b. herbarium SGC; c. JVG 1070821-4. — d. E. eugenei LE 253771, holotype. — e, f. E. allochroum LE254324. — Scale bars = 1 cm. — Photos by: a, d. O. Morozova; b. S. Català; c. J. Vila; e, f. K. Potapov.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4150075&req=5

Figure 17: a–c: Entoloma dichroum. a. LE227472 (photo taken at the neotype locality); b. herbarium SGC; c. JVG 1070821-4. — d. E. eugenei LE 253771, holotype. — e, f. E. allochroum LE254324. — Scale bars = 1 cm. — Photos by: a, d. O. Morozova; b. S. Català; c. J. Vila; e, f. K. Potapov.
Mentions: Although sect. Dichroi has few species, it, however, forms a clearly distinct group. Morphologically it includes species with very pronounced, sharply angled spores such as E. dichroum and E. eugenei. Entoloma allochroum, of uncertain phylogenetic position, is the only other species with similar spores. Section Dichroi is also distinguished genetically by the presence of large insertions in the ITS1 region (282 bp). ITS region in E. dichroum is rather variable, but the p-distance between the specimens studied does not exceed 2 %. Morphological intraspecific variability in E. dichroum is also pronounced (as the variation in colour of the pileus) (Fig. 17a–c). Entoloma dichroum was described by Persoon in 1801. As the holotype does not exist and the type locality is unknown we selected a neotype from the available material. We studied 8 collections previously identified as E. dichroum, and only 4 of them correspond to the current concept of this species. We selected therefore LE227472 (Zhiguli, Russia) as it fits best the protologue.

Bottom Line: Leptonia as well as the new sect.On the basis of the morphological and phylogenetical evidence E. alnetorum is reduced to a variety of E. tjallingiorum, and E. venustum is considered a variety of E. callichroum.Neotypes for E. dichroum, E. euchroum and E. lampropus are designated.

View Article: PubMed Central - PubMed

Affiliation: Komarov Botanical Institute, 197376, 2 Prof. Popov Str., St Petersburg, Russia;

ABSTRACT
This study reveals the concordance, or lack thereof, between morphological and phylogenetic species concepts within Entoloma subg. Leptonia in boreal-temperate Eurasia, combining a critical morphological examination with a multigene phylogeny based on nrITS, nrLSU and mtSSU sequences. A total of 16 taxa was investigated. Emended concepts of subg. Leptonia and sect. Leptonia as well as the new sect. Dichroi are presented. Two species (Entoloma percoelestinum and E. sublaevisporum) and one variety (E. tjallingiorum var. laricinum) are described as new to science. On the basis of the morphological and phylogenetical evidence E. alnetorum is reduced to a variety of E. tjallingiorum, and E. venustum is considered a variety of E. callichroum. Accordingly, the new combinations E. tjallingiorum var. alnetorum and E. callichroum var. venustum are proposed. Entoloma lepidissimum var. pauciangulatum is now treated as a synonym of E. chytrophilum. Neotypes for E. dichroum, E. euchroum and E. lampropus are designated.

No MeSH data available.