First report of Limacella from Bangladesh, with a new species description Author Hosen, Md. Iqbal State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Institute of Microbiology, Guangzhou 510070, China & Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China Author Li, Tai-Hui State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Institute of Microbiology, Guangzhou 510070, China text Phytotaxa 2017 2017-12-22 332 3 280 286 http://dx.doi.org/10.11646/phytotaxa.332.3.4 journal article 10.11646/phytotaxa.332.3.4 1179-3163 Limacella bangladeshana Iqbal Hosen , sp . nov . MycoBank: MB822408 Etymology :—The epithet “ bangladeshana ” (Lat.) refers to the country of origin ( Bangladesh ), where the type material was collected. Diagnosis :— Limacella bangladeshana is closely related to L. myxodictyon , however, it differs in having cream-white to whitish brown with orange brown tinged basidiomata, an absence of floccose annulus, brown to dark brown lamellae when dried, and comparatively shorter globose basidiospores 3.5–4 × 3.5–4 μm, with lower Q value. Typification :— BANGLADESH . Rangpur division : Thakurgaon , Pirganj , Saguni Sal Baghan , 19 July 2011 , Iqbal 276 ( HKAS 81585 , holotype !; PHI-4, isotype !). GenBank accessions ITS: KR816865 and nrLSU: KR816866 . FIGURE 1. Macro-and microscopic features of Limacella bangladeshana (HKAS 75316, holotype; PHI-4, isotype). a. Basidiomata and its caespitose habit, cottony white elements at the pileal margin (arrows). b. Showing fee lamellae, pileus surface and rudimentary elements on the stipe surface (arrow). c. Basidia at different stages of development. d. Basidiospores. Bars: a–c = 20 mm, d, e = 10 μm. Basidiomata epigeous, medium, caespitose. Pileus 45–55 mm broad, subconical to sub-hemispherical, becoming planoconvex, dry, cream-white to whitish brown, sometimes with orange brown tinged, often the pilei splitting and revealing the white context; pileal margin slightly uplifted, non-striate, with orange-brown zone at edge, covered with white velvety to off-white or cottony white squamules, disappearing with age and handling. Context 7 mm thick at pileus center, white, unchanging when cut or bruised. Lamellae 25–30 × 7–9 mm , free, white to cream-white or buff, brown to dark brown when dried, nearly crowded to subdistant; lamellulae 2–3 ranks, attenuated to slightly truncated. Stipe 60–75 × 8–10 mm , cylindrical to subcylindrical, slightly swollen at base, dry, not slimy, surface covered with fibrillose or floccose squamules or rudimentary elements, off-white, cream-white to somewhat orange-tinged, fistulose; stipe context white to off-white, unchanging when bruised. Annulus absent. Odor and taste not recorded. Basidiospores [60/3/1] (3.5–)3.7–4 × 3.5–4 μm, [mean length = 3.95 μm, mean width = 3.83 μm], Q = 1–1.08(– 1.12), Q m = 1.04], globose to rarely subglobose, colorless, hyaline, non-amyloid, thin-walled, smooth; apiculus relatively large, up to 1.2 μm long. Basidia 18–22(–28) × 5–7 μm, narrowly clavate to clavate, hyaline to pale yellow in H 2 O, thin-walled, mostly 4-spored, with sterigmata up to 4 μm long, basal septa often with clamps. Subhymenium up to 30 μm thick, with 2–3 layers of inflated to nearly subglobose cells, thin-walled, colorless. Hymenophoral trama bilateral, filamentous hyphae 3–8 μm wide, mixed with inflated cells measuring 15–30 × 10–18 μm. Lamellar edge fertile. Cheilo-and pleurocystidia absent. Pileipellis an ixo-trichodermium of more or less erect hyphae embedded in a gelatinized matrix, hyphae septate, hyaline, cylindrical, often branching, with terminal cells 25–70 × 5–7 μm, clamp connections frequent. Stipe surface (rudimentary elements near to the stipe apex) interwoven, filamentous, hyaline, thin-walled hyphae 3–5 μm wide, without inflated cells; stipe trama of longitudinally arranged hyphae 4–8 μm wide, mixed with acrophysalidic cells measuring 10–25 μm wide, scattered, thin-walled, hyaline to pale yellow, clamp connections rare; vascular hyphae 3–7 μm wide, often present, colored with yellowish brown vacuolar pigment. Habitat and distribution :—Caespitose, grows on the ground along the roadside of the river bank, near S . robusta tree; currently only known from the type locality, Thumnia Sal Baghan , Thakurgaon , Bangladesh . Specimen examined :— BANGLADESH . Rangpur division : Thakurgaon , Pirganj , Saguni Sal Baghan , 19 July 2011 , Iqbal 276 ( HKAS 81585 , holotype !; PHI-4, isotype !) .