Genus

Halorosellinia

Species

rhizophorae

Author

M.C. Dayarathne, Jones E.B.G. & K.D. Hyde

Class

Sordariomycetes

Order

Xylariales

Family

Xylariaceae

Synonymy:

Habitat: Saprobic on bark of Rhizophora sp. submerged in marine water. 

Ascomata: Hysterothecioid, subglobose to globose in vertical section, solitary to gregarious, erumpent to superficial with base immersed, straight to flexuous, ellipsoid or elongated with pointed ends, opening by a depressed longitudinal slit. 

Peridium: Consisting of three layers, up to 25 µm in diameter, carbonaceous, outer layer dark, inner layer hyaline, compressed, middle layer consisting of 1–2 rows of thick-walled, brown cells.

Pseudoparaphyses: Cellular, hyaline, septate, flexuous, branched, 1–2 µm wide. 

Asci: 63–87 x 8–10 µm, bitunicate, cylindric to claviform, stipitate, octosporous, biseriate.

Ascospores: (14–)16(–18) x (4–)5(–6) µm ( =16 x 5 µm), ellipsoid, slightly curved, light brown, the end cells are rarely paler than the centre cells, biseriate, with 3 transverse septa, often slightly constricted at medium septum.

Culture: Colonies on PDA at 25–28 °C reaching 5 cm in 7days, whitish, zonate with diffuse margins, reverse at first whitish and turning light brown after 3–4 days.

Anamorph: Undetermined.

Fig. 1 Halorosellinia rhizophorae (holotype MFLU 15-0183) a,b Psudostromata on host. b Horizontal section through pseudostroma. c Section through stromata. d Peridium. e Apical apparatus stained dark blue with Melzer’s reagent. f-h Asci. i Paraphyses. j-m Ascospores. Scale bars: b = 200 μm, c = 100 μm, d,e = 20 μm, f-i = 50 μm, j–m = 20 μm

Type & Location:
HOLOTYPE: Thailand, Krabi Province, Krabi, 8°25'52" N, 98°31'42" E, 0 m asl., on submerged root of Rhizophora sp., 7 December 2014, Monika Dayarathne, KRB018 (MFLU 15-0183. holotype). Type Culture:MFLUCC 15-1281; ISOTYPE: Thailand, Krabi Province, Krabi, 8°25'52" N, 98°31'42" E, 0 m asl., on submerged root of Rhizophora sp., 7 December 2014, Monika Dayarathne, (HKAS92496 isotype).
Other Specimens:
Substratum:
Submerged in marine water.
Habitat:
On bark of Rhizophora sp.
Distribution:
Thailand
Pertinent Literature:
Comments:
  • Fig 1
    Fig 1

Address

Mushroom Research Foundation 
Chiang Rai 
Thailand

torperadgj@gmail.com

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