Hebeloma.org: Collection HJB16802

Taxonomy

Collection 16802 (herbarium acc. no. TLXM 6155 (holotype), BR5020224874626V (isotype)) is the holotype of Hebeloma ambustiterranum.

Description

Collecting details

Collection 16802 was collected by H.J. Beker on 8th July 2017 in La Malinche National Park, Tlaxcala, MEXICO (19.275°N, 97.9825°W, altitude approximately 2835 m above sea level - Google maps). The ectomycorrhizal family Pinaceae (genus Pinus) was present.
The surrounding habitat was described as coniferous, montane, subtropical woodland with a substrate of burnt soil, 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. 1.9: Forest – Subtropical/tropical moist montane.
According to the GPS data the collection was in the Trans-Mexican Volcanic Belt pine-oak forests 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: Tropical & Subtropical Coniferous Forests) and Koppen climate code Cwb (Temperate, dry winter, warm summer).

Macroscopic description
Cortina present: yes.
Pileus: 32–52 mm diameter; shape umbonate; margin characters overhanging pileus, smooth; viscosity tacky when moist; spotting no; hygrophanous no; colour variation unicolor; with colour at centre cream; and colour at margin not recorded; with remains of universal veil yes.
Lamellae: attachment emarginate; maximum depth up to 5 mm; number of complete lamellae 64; tears absent; white fimbriate edge present.
Stipe: 35–50 x 6–8 {median} x 6–8 {basal} mm; stipe Q 5.0–7.1; base cylindrical; floccosity fibrillose, pruinose at apex; rooting no; mycelial chords no.
Context: texture firm; stipe interior hollow; stipe flesh discolouring from base yes; slenderness measure 6.4; smell none; taste not recorded.
Spore deposit colour: clay-buff.
Exsiccata: analysis not yet complete.

Microscopic description
Spores: shape ellipsoid, ovoid; colour through microscope brown pale, very pale, yellow pale; guttulate yes; papillate no; Spore Code: O1; P0; D1.
Basidia: 24.9–29.4 x 6.4–7.6 μm; ave. Q = 4.0; basidia spore nature not recorded.
Cheilocystidia: main shape lageniform, ventricose; special features septa; Cheilocystidia Ratios: A/M = 0.99; A/B = 0.58; B/M = 1.75.
Pleurocystidia: no.
Ixocutis: epicutis thickness (measured from exsiccata) 100 μm; ixocutis maximum hyphae width 5 μm; ixocutis hyphae encrustation yes; shape of trama elements beneath subcutis cylindrical up to 14 μm wide.
Caulocystidia: caulocystidia maximum length 110 μm.

Spore (min) 5%-95% (max) mean median S.D.
Length (µm) (7.1) 7.7–9.8 (11.0) 8.9 8.9 0.680
Width (µm) (5.2) 5.5–7.0 (7.3) 6.0 5.9 0.440
Q (1.20) 1.25–1.63 (1.70) 1.47 1.48 0.11

Cheilocystidium (µm) (min) 5%-95% (max) mean median S.D.
Length (29) 30–39 35 35 2.98
Apex Width (3.2) 3.5–5.3 (5.6) 4.3 4.3 0.630
Median Width 3.8–5.2 (5.4) 4.4 4.2 0.5
Basal Width (5.9) 6.2–9.1 (10.6) 7.6 7.3 1.14

Spore	(min) 5%-95% (max)	mean	median	S.D.
Length (µm)	(7.1) 7.7–9.8 (11.0)	8.9	8.9	0.680
Width (µm)	(5.2) 5.5–7.0 (7.3)	6.0	5.9	0.440
Q	(1.20) 1.25–1.63 (1.70)	1.47	1.48	0.11

Cheilocystidium (µm)	(min) 5%-95% (max)	mean	median	S.D.
Length	(29) 30–39	35	35	2.98
Apex Width	(3.2) 3.5–5.3 (5.6)	4.3	4.3	0.630
Median Width	3.8–5.2 (5.4)	4.4	4.2	0.5
Basal Width	(5.9) 6.2–9.1 (10.6)	7.6	7.3	1.14

Temperature calculation
Max temp Min temp Precipitation
Annualised average (2017) 20.57 °C 4.04 °C 92.50 mm
Collection month (7/2017) 20.25 °C 5.81 °C 144.24 mm
Max month (2017) 22.86 °C 6.48 °C 245.42 mm

	Max temp	Min temp	Precipitation
Annualised average (2017)	20.57 °C	4.04 °C	92.50 mm
Collection month (7/2017)	20.25 °C	5.81 °C	144.24 mm
Max month (2017)	22.86 °C	6.48 °C	245.42 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	146.0	131.45	1^st–13^th/20
Average length	8.9	9.08	13^th/20
Average width	6.0	6.09	11^th–17^th/20
Standard deviation of length	0.68	0.60	5^th/20
Standard deviation of width	0.44	0.35	3^rd–4^th/20
Median length	8.9	9.06	12^th–13^th/20
Median width	5.9	6.06	16^th–18^th/20
Minimum length	7.1	7.52	13^th–17^th/20
Minimum width	5.2	5.24	9^th–14^th/20
Low length	7.7	8.13	14^th–17^th/20
Low width	5.5	5.59	14^th–15^th/20
High length	9.8	10.07	14^th/20
High width	7.0	6.71	2^nd/20
Max length	11.0	10.67	1^st–5^th/20
Max width	7.3	7.19	4^th–9^th/20

Spore feature	Value	Commonalities
Ornamentation	O1	100% of collections
Perispore loosening	P0	100% of collections
Dextrinoidity	D1	100% of collections