Taxon Details: Costatisporus cyanescens T.W.Henkel & M.E.Sm. in M.E.Smith, Amses, T.F.Elliott, Obase, Aime & T.W.Henkel
Taxon Profile:
 | The Plant List |
 | International Plant Name Index |
 | Tropicos |
 | Catalogue of Life |
 | Global Biodiversity Information Facility |
 | JSTOR Types |
| JSTOR |
 | BHL |
 | Encyclopedia of Life |
 | WikiSpecies |
 | Google Scholar |
 | PubMed |
 | Morphbank |
 | IUCN |
 | National Center for Biotechnology Information |
 | Barcode of Life |
Multimedia:
Narratives:
Family:
Boletaceae (Basidiomycota)
Boletaceae (Basidiomycota)
Scientific Name:
Costatisporus cyanescens T.W.Henkel & M.E.Sm. in M.E.Smith, Amses, T.F.Elliott, Obase, Aime & T.W.Henkel
Costatisporus cyanescens T.W.Henkel & M.E.Sm. in M.E.Smith, Amses, T.F.Elliott, Obase, Aime & T.W.Henkel
Primary Citation:
New sequestrate fungi from Guyana: Jimtrappea guyanensis gen. sp. nov., Castellanea pakaraimophila gen. sp. nov., and Costatisporus cyanescens gen. sp. nov. (Boletaceae, Boletales).
IMA Fungus 6: 312. 2015
New sequestrate fungi from Guyana: Jimtrappea guyanensis gen. sp. nov., Castellanea pakaraimophila gen. sp. nov., and Costatisporus cyanescens gen. sp. nov. (Boletaceae, Boletales).
IMA Fungus 6: 312. 2015
Accepted Name:
This name is currently accepted.
This name is currently accepted.
Description:
Diagnosis: A sequestrate taxon with off-white to grayish yellow exterior, staining dark blue. Lacking a columella in the brown gleba, with a chocolate nutty odor; basidiospores inamyloid, with complex ribbed ornamentation.
Macroscopic description: Basidioma subglobose to ovate and slightly lobed, 12–26 mm tall, 12–33 mm broad; surface initially off-white to light to grayish yellow (4A3–4A4, 4B3) where unstained by soil, developing increasingly deep blue (23C8–23D8–23E8) stains slowly and progressively over 5-10 minutes where squeezed or bruised, firm, softer in areas, with small, possibly invertebrate mycophagist excavations, glabrous macroscopically, under hand lens matted tomentose, with age gelatinizing in areas to dark brown and viscid; base subtended by one to several tan hyphal cords. Peridium in longitudinal section thin, 0.3–0.7 mm, appearing single-layered macroscopically, white initially, bluing slowly but intensely on exposure in younger specimens, separable. Gleba densely loculate with brown-hispid interior surfaces under hand lens, initially brown (7E8) to reddish brown (7F6–7F7–7F8, 8F8) throughout, with age gelatinizing and darker brown (9F4–9F5–9F6), with advanced age violet brown (10F5) over outer 1/6 with locule structure breaking down and blue stains evident on glebal trama under hand lens, acolumellate, with a grayish, gelatinous sterile basal pad 1 × 5 mm. Odor strong, variously described as chocolate-nutty, musty, soapy, putty-like, or of mushroom buillon; taste indistinctive, fungoid. Macrochemical reactions: KOH reddish brown on peridium and gleba; NH4OH nil on all surfaces.
Microscopic description: Peridium 150–615 µm thick, two-layered; outer layer 50–415 µm thick, dark yellow to brownish, of tightly interwoven hyphae; individual hyphae with yellow cytoplasmic pigment in H2O and KOH, occasionally hyaline; intercalary cells 20–92.5 × 5–10 µm, thin-walled, frequently with spiraled to ring-like extracellular encrustations; inner layer 50–250 µm thick, hyaline, of loosely interwoven to parallel hyphae, these 3–8 µm wide, thin-walled. Glebal trama composed of mediostratum and lateral stratum; mediostratum hyaline in H2O and KOH, 25–45 µm wide, often splitting at locule junctions, of parallel to loosely interwoven hyphae, these hyaline in KOH and H2O or infrequently with pale yellow cytoplasmic pigments, 2–8 µm wide, thin-walled; lateral stratum moderately to strongly diverging, 10–49 µm thick; individual hyphae hyaline in H2O and KOH, 4–7 µm wide, thin-walled, grading into interwoven subhymenium hyphae, these hyaline to pale yellow, 5–9 µm wide, thin-walled. Hymenium a palisade of basidia and basidioles. Basidia subclavate to clavate, hyaline to faintly gray in H2O and KOH, 39.0–66.4 µm long, 7.5–12.2 µm broad at apex, 3–9 µm at center, 2.5–5.8 µm at base, thin-walled; sterigmata three or four, 4.5–5.5 × 1–2 µm. Basidiospores statismosporic, yellowish to light brown in H2O and KOH, inamyloid, with complex costate ornamentation of 5–10 longitudinal, somewhat spiraled main ridges running pole to pole; ridges entire or discontinuous and occasionally bifurcating, with numerous narrow, shallow, nearly perpendicular cross-ridges, subglobose to oblong with ornamentation included, 17–25 × (10–)13–20 µm (mean= 19.9 ± 1.41 × 15.9 ± 1.96 µm; Qr = 1.00–1.80(–2.30), Qm = 1.27 ± 0.20; n = 118), ovate to subfusiform and basally acuminate with ornamentation excluded, 14–21 × 8–11.5 µm (mean= 16.8 ± 1.32 × 10.0 ± 0.65 µm; Qr = 1.36–2.21, Qm = 1.69 ± 0.17; n = 100); pedicel infrequent, 0.5–4 × 1–2 µm. Cystidia and clamp connections absent.
Registration number: MB812364
Nomenclature remarks: The only species described (as a sp. nov.) following the generic description on the same page is C. cyanescens. Satisfies valid publication according to Art. 38.5.
Ectomycorrhiza: Presumed with Dicymbe corymbosa and Aldina insignis.
Distribution: Guyana
Commentary: A relationship within Boletaceae is inferred from molecular analysis which suggests Costatisporus is a sister taxon to Sutorius.
Diagnosis: A sequestrate taxon with off-white to grayish yellow exterior, staining dark blue. Lacking a columella in the brown gleba, with a chocolate nutty odor; basidiospores inamyloid, with complex ribbed ornamentation.
Macroscopic description: Basidioma subglobose to ovate and slightly lobed, 12–26 mm tall, 12–33 mm broad; surface initially off-white to light to grayish yellow (4A3–4A4, 4B3) where unstained by soil, developing increasingly deep blue (23C8–23D8–23E8) stains slowly and progressively over 5-10 minutes where squeezed or bruised, firm, softer in areas, with small, possibly invertebrate mycophagist excavations, glabrous macroscopically, under hand lens matted tomentose, with age gelatinizing in areas to dark brown and viscid; base subtended by one to several tan hyphal cords. Peridium in longitudinal section thin, 0.3–0.7 mm, appearing single-layered macroscopically, white initially, bluing slowly but intensely on exposure in younger specimens, separable. Gleba densely loculate with brown-hispid interior surfaces under hand lens, initially brown (7E8) to reddish brown (7F6–7F7–7F8, 8F8) throughout, with age gelatinizing and darker brown (9F4–9F5–9F6), with advanced age violet brown (10F5) over outer 1/6 with locule structure breaking down and blue stains evident on glebal trama under hand lens, acolumellate, with a grayish, gelatinous sterile basal pad 1 × 5 mm. Odor strong, variously described as chocolate-nutty, musty, soapy, putty-like, or of mushroom buillon; taste indistinctive, fungoid. Macrochemical reactions: KOH reddish brown on peridium and gleba; NH4OH nil on all surfaces.
Microscopic description: Peridium 150–615 µm thick, two-layered; outer layer 50–415 µm thick, dark yellow to brownish, of tightly interwoven hyphae; individual hyphae with yellow cytoplasmic pigment in H2O and KOH, occasionally hyaline; intercalary cells 20–92.5 × 5–10 µm, thin-walled, frequently with spiraled to ring-like extracellular encrustations; inner layer 50–250 µm thick, hyaline, of loosely interwoven to parallel hyphae, these 3–8 µm wide, thin-walled. Glebal trama composed of mediostratum and lateral stratum; mediostratum hyaline in H2O and KOH, 25–45 µm wide, often splitting at locule junctions, of parallel to loosely interwoven hyphae, these hyaline in KOH and H2O or infrequently with pale yellow cytoplasmic pigments, 2–8 µm wide, thin-walled; lateral stratum moderately to strongly diverging, 10–49 µm thick; individual hyphae hyaline in H2O and KOH, 4–7 µm wide, thin-walled, grading into interwoven subhymenium hyphae, these hyaline to pale yellow, 5–9 µm wide, thin-walled. Hymenium a palisade of basidia and basidioles. Basidia subclavate to clavate, hyaline to faintly gray in H2O and KOH, 39.0–66.4 µm long, 7.5–12.2 µm broad at apex, 3–9 µm at center, 2.5–5.8 µm at base, thin-walled; sterigmata three or four, 4.5–5.5 × 1–2 µm. Basidiospores statismosporic, yellowish to light brown in H2O and KOH, inamyloid, with complex costate ornamentation of 5–10 longitudinal, somewhat spiraled main ridges running pole to pole; ridges entire or discontinuous and occasionally bifurcating, with numerous narrow, shallow, nearly perpendicular cross-ridges, subglobose to oblong with ornamentation included, 17–25 × (10–)13–20 µm (mean= 19.9 ± 1.41 × 15.9 ± 1.96 µm; Qr = 1.00–1.80(–2.30), Qm = 1.27 ± 0.20; n = 118), ovate to subfusiform and basally acuminate with ornamentation excluded, 14–21 × 8–11.5 µm (mean= 16.8 ± 1.32 × 10.0 ± 0.65 µm; Qr = 1.36–2.21, Qm = 1.69 ± 0.17; n = 100); pedicel infrequent, 0.5–4 × 1–2 µm. Cystidia and clamp connections absent.
Registration number: MB812364
Nomenclature remarks: The only species described (as a sp. nov.) following the generic description on the same page is C. cyanescens. Satisfies valid publication according to Art. 38.5.
Ectomycorrhiza: Presumed with Dicymbe corymbosa and Aldina insignis.
Distribution: Guyana
Commentary: A relationship within Boletaceae is inferred from molecular analysis which suggests Costatisporus is a sister taxon to Sutorius.