Freshwater Ascomycetes - Species Monograph
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| Genus |
Species |
Author |
| Physalospora |
vaccinii |
(Shear) Arx & Müller, Beitr. Kryptogamenfl. Schweiz 11: 167. 1954. |
| Class |
Order |
Family |
| Sordariomycetes |
Xylariales |
Hyponectriaceae |
|
| Synonymy: |
≡ Acanthorhynchus vaccinii Shear, Bull. Torrey Bot. Club 34: 314. 1907. |
Description
|
| Habit: |
Subepidermal on submerged partially decomposed leaves of Vaccinium oxycoccus. |
|
| Ascomata: |
Ascomata 400–440 x 216–280 µm, subglobose or pyriform, scattered, membranous, subepidermal, with the beak protruding out of the epidermis, with hyaline venter, occurring mostly on the underside of leaves. |
|
| Peridium: |
Peridium 14–22 µm thick, hyaline, composed of 3 or 4 layers of pseudoparenchymatic cells; cells 11.5–29 x 1.9–9.7 µm |
|
| Beak: |
Beaks 168–200 x 80–104 µm, black, periphysate, composed of 3–5 layers of darkened small globose cells, 4–12 x 2–8 µm, with spines 66.3–136.5 x 1.9–7.8 µm; spines at 30 to 45 degree angle. |
|
| Hamathecium: |
Paraphyses 136.5–218 x 3.9–9.75 µm, wide at the base, narrowing toward apex, with gel coating, extending beyond asci. |
|
| Ascus: |
Asci 140–191 x 39–52.5 µm, subelliptical or clavate, with narrower upper portion at times, truncate at the apex, unitunicate, thin-walled, persistent, with MLZ- apical apparatus, tapering to a subsessile base. |
|
| Ascospore: |
Ascospores (27.3-) 29–43.3 (-46.8) x 11.7–17.5 (-19.5) µm, oblong-elliptic, hyaline when young, becoming light brown at maturity, densely guttulate, echinulate, thick-walled, with a gelatinous sheath. |
|
| Sheath: |
Gelatinous rough walled sheath surrounds ascospore. |
|
| Appendage: |
Not observed. |
|
| Culture: |
1. ATCC |
| Anamorph: |
|
|
Other info
|
| Type & Location: |
|
| Other Specimens: |
1. USA. WISCONSIN: Vilas Co., Crystal Bog, UTM Zone 16, 298235mE, 5098282mN, 46°00'422"N, 89°36'361W, on submerged partially decomposed leaves of Vaccinium oxycoccus, 7 Jan. 1996, PMF & JLC P5-12 (ILLS 54018); 28 May 1996, PMF & JLC P5-15 (ILLS 54021); 1 May 1997, PMF & JLC P5-32 (ILLS 54019); 3 Aug. 1997, PMF & JLC, P5-33 (ILLS 54020); 26 Sept. 1997, PMF & JLC P5-34; 14 Nov. 1997, PMF & JLC P5-35; Acanthorhynchus vaccinii Shear, on leaves of Vaccinium macrocarpon, West Mills, New Jersey, September, 1901. (Holotype No. 1493 C.L.S, BPI). Physalospora vaccinii (Shear) Arx & Müller, on Vaccinium oxycoccus, Mt. Masfield, trail to Chin, Vermont, August 28, 1964, M.E. Barr #4584, NY; P. vaccinii (Shear) Arx & Müller on V. macrocarpon, Ruggles Pond, Leverett, Massachusetts, September 22, 1962, M.E. Barr #3765, NY. Single ascospore culture deposited at ATCC (201014). |
| Substratum: |
Leaves of Vaccinium oxycoccus. |
| Habitat: |
1. On leaves of Vaccinium oxycoccus submerged in bogs. |
| Distribution: |
1. USA (WI); Generally - North America, Europe. |
| Pertinent Literature: |
1. Fallah & Shearer 2001. |
| Comments: |
1. Physalospora oxycoccus occurs on leaves of Vaccinium in terrestrial habitats and may have been carried on fallen leaves into nearby bogs. |
Additional Pictures
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