Pleosporales » Tetraplosphaeriaceae » Ernakulamia

Ernakulamia cochinensis

Ernakulamia cochinensis (Subram.) Subram.

Index Fungorum number: IF 374840; Facesoffungi number: FoF09277

Basionym: Petrakia cochinensis Subram., Beih. Sydowia 1: 15 (1957) [1956]

Synonymy: Piricauda cochinensis (Subram.) M.B. Ellis, More Dematiaceous Hyphomycetes (Kew): 367 (1976)

 

Saprobic on submerged wood. Sexual morph: Undetermined. Asexual morph: Colonies effuse, gregarious, black. Mycelium composed of pale brown, septate hyphae. Conidiophores and conidiogenous cells not seen. Conidia 55–85 × 35–55(–70) μm (x̄ = 70 × 14 μm, n = 15), variable in shape but often obconical or pyriform, black, muriform which is not clear when mature, thin-walled, easily cracked, often verrucose at base, with numerous (up to 10), cylindrical, septate, brown, smooth appendages, 6–105 × 3–4 μm. (Description from Dong et al. 2020)

 

Culture characteristics: On PDA, colony ellipsoidal, reaching 35 mm in 25 days at 25 °C, grey from above, brown from below, surface rough, with dense mycelium, dry, raised, edge entire.

 

Material examined: THAILAND, Songkhla Province, on submerged wood in a stream, 10 May 2018, W. Dong, hat161 (MFLU 18-1565), living culture MFLUCC 18-1237.

 

Notes: New collection, MFLUCC 18-1237, of Dong et al. (2020) is identified as Ernakulamia cochinensis based on identical LSU and ITS sequence data with PRC 3992, and phylogenetic analysis. MFLUCC 18-1237 has larger conidia than in PRC 3992 from the natural substrate (55–85 × 35–55(–70) μm vs. 24–60 × 18–53 μm) but resembles with those from culture (36–81 × 19–56 μm) (Delgado et al. 2018). The conidiogenous cells of E. cochinensis cannot be observed from mature, blackish conidia in our collection. This is a new habitat and geographical record for E. cochinensis from freshwater in Thailand. (Notes from Dong et al. 2020)

 

Freshwater distribution: Thailand (Dong et al. 2020)

 

Fig 1. Ernakulamia cochinensis (MFLU 18-1565) a Colonies on submerged wood, b–h Conidia, i Germinated conidium, j, k Colony on PDA (left-front, right-reverse). Scale bars: b–i = 50 μm (Dong et al. 2020)

 

References

Delgado G, Koukol O, Cáceres O, Piepenbring M (2017) The phylogenetic placement of Ernakulamia cochinensis within pleosporales (Dothideomycetes, Ascomycota). Cryptogam Mycol 38:435–451. https://doi.org/10.7872/crym/v38.iss4.2017.435

Dong W, Wang B, Hyde KD, McKenzie EHC, Raja HA, Tanaka K, Abdel-Wahab MA, Abdel-Aziz FA, Doilom M, Phookamsak R, Hongsanan S, Wanasinghe DN, Yu X-D, Wang G-N, Yang H, Yang J, Thambugala KM, Tian Q, Luo Z-L, Yang J-B, Miller AN, Fournier J, Boonmee S, Hu D-M, Nalumpang S, Zhang H (2020) Freshwater Dothideomycetes. Fungal Divers 105:319–575. https://doi.org/10.1007/s13225-020-00463-5

 

Recent Genus

1
Neochlamydotubeufia
Neohelicomyces

Recent Species

Neohelicomyces submersus
Neohelicomyces hyalosporus
Neohelicomyces grandisporus