Chaenothecopsis neocaledonica J. Rikkinen, H. Tuovila &amp; A. R. Schmidt 2014, sp. nov.
Creators: name: Rikkinen, Jouko
name: Tuovila, Hanna
name: Beimforde, Christina
name: Seyfullah, Leyla J.
name: Perrichot, Vincent
name: Schmidt, Alexander R.
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Fungi
Ascomycota
Eurotiomycetes
Mycocaliciales
Mycocaliciaceae
Chaenothecopsis
Chaenothecopsis neocaledonica

description: <i>Chaenothecopsis neocaledonica</i> J. Rikkinen, H. Tuovila &amp; A.R. Schmidt, <i>sp. nov.</i> (Figures 2C and 3–5) <b>Type</b>: –– NEW CALEDONIA, Province Sud: Yaté. Along road RP 3 about 5 km west of Yaté. On resin, resin-soaked bark and lignum of <i>Agathis ovata</i>, 411 m, 22°10’03.63’’S, 166°54’10.15’’E, 5 November 2011, Rikkinen 010179 (holotype P, isotypes H, GenBank KF815196 / KF815197, MycoBank MB 806059). <b>Diagnosis</b>:–– <i>Chaenothecopsis neocaledonica</i> differs from related <i>Chaenothecopsis</i> species in having very robust ascomata with wide and flat capitula, wide and thick-walled hyphae in the stipe, and noticeably large one-septate ascospores. <b>Description</b>:–– <i>Apothecia</i> on exudate of <i>Agathis ovata</i>, 1400–2400 µm high. <i>Stipe</i> shining black or sometimes olivaceous, straight, sometimes flexuous, occasionally branched, 180–260 µm wide. <i>Capitulum</i> black, in young apothecia usually lenticular to subspheric, later lobate and plano-concave, 150–600 µm wide. <i>Asci</i> cylindrical, 96–115 × 5.5–6.5 µm (n = 10), apex variously thickened, thickening gradually disappearing, mature asci usually without a thickening, apices often covered with hyaline, amorphous material IKI+ weakly blue, dissolving in KOH; formed with croziers. <i>Ascospores</i> uniseriate, usually obliquely to periclinally oriented in asci, septate, septa as thick or slightly thinner than spore wall, brown, ellipsoid to cylindrical, smooth, sometimes thickened at the ends; (12.3–) 13.4–17.6 (–18.6) × (4.4–) 4.9–6.3 (–6.7) µm (n = 100, from 7 ascocarps, 2 populations), mean 15.1 × 5.7 µm, Q = (2.2–) 2.3–3.1 (–3.8), mean Q = 2.7. <i>Paraphyses</i> hyaline, filiform, 1.0–1.5 µm wide (n = 10), with several branches, very long, reaching and curving above asci; septate, septal intervals 10–25 µm. <i>Stipe</i> hyphae covered with hard glass-like layer dissolving in KOH, 10–16 µm wide, walls two layered: outer wall hyaline, 2–5 µm wide, inner wall yellowish green to yellowish brown to dark brown, 1.5 µm wide; hyphae intertwined and outer cell walls fused (<i>textura intricata-oblita</i>); IKI+ slowly violet red; hyphae swell in KOH and brown pigment leaks into the medium; hyphae in inner part of stipe hyaline, slightly intertwined, walls up to 8 µm wide. <i>Excipulum</i> hyphae yellowish brown to greenish brown, 5–8 µm wide, wall 1–1.5 µm, periclinally arranged or slightly intertwined, outer cell walls fused (<i>textura prismatica-oblita</i>); IKI+ slowly violet red, hyphae swell in KOH, some brown pigment leaks into the medium. <i>Hymenium</i> IKI+ blue, slowly disappearing; full of colorless, CR– crystals, only partly dissolving in KOH. <i>Hypothecium</i> hyaline, hyphae swell in KOH. <i>Epithecium</i> yellowish green or almost hyaline, composed of elements from excipulum and paraphyses. The thick-walled hyphae of excipulum reach to cover the asci, intertwine and form a tight net, hard to break, with small holes, on average 3–5 × 5–8 µm in size. Paraphyses curve at the level of ascus tips to cover the asci, branch repeatedly just beneath the net of excipular hyphae, forming an inner layer of the epithecium; excipular part of epitechium IKI+ faint violet red. All parts MLZ –. <b>Etymology</b>:—In reference to New Caledonia, France, where the species was first discovered. <b>Further specimens examined</b>:–– NEW CALEDONIA, Province Sud: Yaté. Another <i>Agathis ovata</i> trunk at type locality, Rikkinen 010180 (paratype H). Along road GR NC 1 in Blue River Provincial Park near the Refuge des Scientifiques, 180 m, 22º05’58.62’’S, 166º39’00.12’’E, 12. November 2011, Rikkinen 010273.
description: Published as part of <i>Rikkinen, Jouko, Tuovila, Hanna, Beimforde, Christina, Seyfullah, Leyla J., Perrichot, Vincent &amp; Schmidt, Alexander R., 2014, Chaenothecopsis neocaledonica sp. nov.: The first resinicolous mycocalicioid fungus from an araucarian conifer, pp. 49-60 in Phytotaxa 173 (1)</i> on page 52, DOI: 10.11646/phytotaxa.173.1.4, http://zenodo.org/record/5142744