Hebeloma.org: Collection HJB17673

Taxonomy

Collection 17673 (herbarium acc. no. C-F-104149) is the holotype of Hebeloma arcticum.

Description

Collecting details

Collection 17673 was collected by H. Knudsen (16.119) on 14th August 2016 in Sisimiut, at the bridge on the road to the airport, W, GREENLAND (approx. 66.9443°N, 53.6704°W, altitude approximately 0 m above sea level - Google maps). No ectomycorrhizal plants were recorded.
The surrounding habitat was described as arctic tundra, corresponding to the IUCN habitat We map from the collector's description of the habitat to the International Union for Conservation of Nature (IUCN)'s definition using a standardised set of rules. Please see this page for a full list of IUCN habitats. 4.1: Grassland – Tundra.
According to the GPS data the collection was in the Kalaallit Nunaat Arctic steppe WWF ecoregion The World Wildlife Fund (WWF) have divided the world into 867 terrestrial ecoregions. The ecoregion here is estimated by mapping from the GPS coordinates of the collection using data made available by Dinerstein et al (2017). Use this webtool to explore the ecoregions visually or see a full list of current ecoregions on Wikipedia. (biome: Tundra) and Koppen climate code ET (Polar, tundra).

Macroscopic description
Cortina present: no.
Pileus: analysis not yet complete.
Lamellae: attachment not recorded; maximum depth not recorded; number of complete lamellae 40; tears not recorded; white fimbriate edge present.
Stipe: analysis not yet complete.
Context: analysis not yet complete.
Spore deposit colour: analysis not yet complete.
Exsiccata: analysis not yet complete.

Microscopic description
Spores: shape amygdaloid, ellipsoid, ovoid; colour through microscope brown yellow; guttulate yes; papillate no; Spore Code: O1; P0; D2; D3.
Basidia: 25.3–36.7 x 7.2–9.1 μm; ave. Q = 3.6; basidia spore nature not recorded.
Cheilocystidia: main shape clavate-stipitate, clavate-lageniform or clavate-ventricose; special features apical thickening, branching, septa; Cheilocystidia Ratios: A/M = 1.48; A/B = 1.18; B/M = 1.32.
Pleurocystidia: no.
Ixocutis: epicutis thickness (measured from exsiccata) 90 μm; ixocutis maximum hyphae width 6 μm; ixocutis hyphae encrustation no; shape of trama elements beneath subcutis isodiametric up to 15 μm wide.
Caulocystidia: caulocystidia maximum length 80 μm.

Spore (min) 5%-95% (max) mean median S.D.
Length (µm) (9.8) 10.4–13.2 (13.3) 11.9 11.9 0.840
Width (µm) (5.2) 5.9–7.2 (7.6) 6.5 6.6 0.390
Q (1.51) 1.57–2.04 (2.13) 1.83 1.83 0.14

Cheilocystidium (µm) (min) 5%-95% (max) mean median S.D.
Length (38) 40–53 45 44 4.5
Apex Width (6.1) 6.5–8.3 7.4 7.4 0.630
Median Width 4.1–5.8 (6.1) 5.0 5.0 0.53
Basal Width (4.7) 4.8–8.8 6.6 6.5 1.53

Spore	(min) 5%-95% (max)	mean	median	S.D.
Length (µm)	(9.8) 10.4–13.2 (13.3)	11.9	11.9	0.840
Width (µm)	(5.2) 5.9–7.2 (7.6)	6.5	6.6	0.390
Q	(1.51) 1.57–2.04 (2.13)	1.83	1.83	0.14

Cheilocystidium (µm)	(min) 5%-95% (max)	mean	median	S.D.
Length	(38) 40–53	45	44	4.5
Apex Width	(6.1) 6.5–8.3	7.4	7.4	0.630
Median Width	4.1–5.8 (6.1)	5.0	5.0	0.53
Basal Width	(4.7) 4.8–8.8	6.6	6.5	1.53

Temperature calculation
Max temp Min temp Precipitation
Annualised average (2016) 0.42 °C -5.55 °C 45.04 mm
Collection month (8/2016) 10.37 °C 4.13 °C 33.50 mm
Max month (2016) 11.00 °C 4.50 °C 72.93 mm

	Max temp	Min temp	Precipitation
Annualised average (2016)	0.42 °C	-5.55 °C	45.04 mm
Collection month (8/2016)	10.37 °C	4.13 °C	33.50 mm
Max month (2016)	11.00 °C	4.50 °C	72.93 mm

Analyse this collection
- See this collection in our species identifier.
- See this collection's sequences in Genbank .

Compare this collection to its species

This section compares data for this collection against its true species and also against the most likely species as determined by our identifier. More often than not these will be the same species, but where this is not the case, the data may be used to help explain why the identifier got it wrong.

Image gallery

Detailed statistics

Spore measurements	My value	Species mean value	Position
Count	102.0	54.73	1^st/11
Average length	11.9	11.40	3^rd–4^th/11
Average width	6.5	6.60	6^th–9^th/11
Standard deviation of length	0.84	0.78	5^th/11
Standard deviation of width	0.39	0.40	6^th/11
Median length	11.9	11.44	4^th/11
Median width	6.6	6.62	5^th–7^th/11
Minimum length	9.8	9.69	4^th–5^th/11
Minimum width	5.2	5.69	11^th/11
Low length	10.4	10.13	3^rd/11
Low width	5.9	5.97	6^th–7^th/11
High length	13.2	12.62	3^rd/11
High width	7.2	7.23	6^th–7^th/11
Max length	13.3	13.05	4^th/11
Max width	7.6	7.46	2^nd–5^th/11

Spore feature	Value	Commonalities
Ornamentation	O1	100% of collections
Perispore loosening	P0	100% of collections
Dextrinoidity	D2; D3	72% of collections; 81% of collections