| Bibliography: | Boehm, E.W.A.; Mugambi, G.K.; Miller, A.N.; Huhndorf, S.M.; Marincowitz, S.L.; Spatafora, J.W.; Schoch, C.L., 2009, Studies in Mycology 64: 59 (more info)
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| Year of publication: | 2009 |
| Status of the name: | combination; legitimate |
| MycoBank's opinion: | currently used |
| Classification: | Fungi, Ascomycota, Pezizomycotina, Dothideomycetes, Hysteriales, Hysteriaceae, Oedohysterium |
| Basionym: | Hysterographium pulchrum Checa, Shoemaker & Umaña 2007 [LEG; MB505725] |
| Obligate synonym(s): | none |
| Morphic status: | Teleomorph (anamorph connection(s) unknown or not recorded) |
Taxonomic synonym(s):
Ordered by epithet name | none |
Descriptions:
 | Latin diagnosis (Checa, J.; Shoemaker, R.A.; Umaña, L. 2007, Mycologia 99(2): 289)
Ascomata hysteriformia. Physes ad extremum carmesinae. Asci bitunicati, nonnihil clavati, octospori, 80-90 x 13-15 µm, (pars sporif.) tendem pedicellati (ca. 50 µm lg.). Ascosporae tetraseriatae vel uniseriatae, teres, ellipsoideae, rectae vel inaequilateral, rubrobrunneae, eguttulatae, leviae, 22-25(-27) x 5-6 µm, lg/lat. 3.7, transversim (5)6-septate, in ordine (4) :3:2:1:2:3:(4), longistrorsum 0- vel plerumque 1-septatae in duo cellulae prope septum primum; septo primo supramedio (0.40), constricto; cellulae antepenultimatae inflatae; septa tenuia; sine strato mucoso.
Diagnosis. Hysterographium mori (Schwein.) Rehm similis sed distinct; ascosporae pluriseptatae, asymmetricae.
Original description (Checa, J.; Shoemaker, R.A.; Umaña, L. 2007, Mycologia 99(2): 298)
Ascomata in bark, semi-immersed, hysteriform, 0.5-2 mm long, 250 µm wide, 250 µm high, smooth, glabrous (Figs. 4, 5). Sulcus central. Ascocarp wall in section mostly 20-30 µm thick, of about seven layers of rectangular, brick-like, thin-walled cells 8-20 x 2-4 µm, with occasional lateral excrescences of 20-25 layers of similar cells and 50 µm wide (Figs. 9, 10). Paraphyses numerous, 1 µm wide, aseptate, without guttules, without slime coating, outermost centrum tissue red. Asci bitunicate, numerous, in a basal cluster, somewhat clavate, 80-90 x 13-15 µm (pars sporif.), long-stalked (ca. 50 µm) with eight, overlapping linearly tetraseriate ascospores above to uniseriate below (Fig. 14). Ascospores terete, ellipsoid, L/W 3.7, straight to inequilateral, 22-25(-27) x 5-6 µm, transversely (5)6-septate, in centrifugal sequence (4):3:2:1:2:3:(4), mostly with one vertical septum in both cells next primary septum (absent in some spores), first-formed septum supramedian (0.40), constricted at first-formed septum and slightly so at others, without dots at ends of septa, septa thin, widest at third cell from apex, pale reddish brown, without guttules, smooth, without sheath (Figs. 36-45).
Etymology. pulchrum L. beautiful, referring to the ascospores.
Holotype. - Costa Rica. Guanacaste: Tempisque, National Park Palo Verde. Palo Verde, 10:21:26.5245 N 85:19:10.0313 W, elev. 0-100 m, on branch, 15 Nov. 2001, M. Oses-2150 (INB0003466397; ISOTYPES: AH 34504, DAOM 234345).
Non-original description (Boehm, E.W.A.; Mugambi, G.K.; Miller, A.N.; Huhndorf, S.M.; Marincowitz, S.L.; Spatafora, J.W.; Schoch, C.L. 2009, Stud. Mycol. 64: 60)
Notes: The newly described Hysterographium pulchrum Checa, Shoemaker & Umaña from Costa Rica (Checa et al. 2007) also falls within Clade D (Fig. 1) and is here transferred to Oedohysterium, as Oedo. pulchrum. This is because molecular data indicate a close association with the two species of Oedohysterium, Oedo. insidens and Oedo. sinense. At first surprising, on further consideration, this sub-clade forms a natural assemblage premised on morphological features. The spores of all three taxa show a remarkable degree of similarity in morphology, which includes being similarly pigmented, slightly curved and fusiform, with a common number of transverse septa. The sole difference is the presence of one or two vertical septa in Oedo. pulchrum, a feature noted by the authors to be absent in some spores (Checa et al. 2007). Most importantly, like Oedo. insidens and Oedo. sinense, Oedo. pulchrum also possesses a swollen supra-median cell. Interestingly, a striking resemblance to the phragmospores of Oedo. insidens can be seen for those spores of Oedo. pulchrum that do not possess vertical septa (Checa et al. 2007). This is based on similarities in shape (e.g., curved and fusiform), size [(20–)23–28(–38) x (5–)7–10(–13) µm versus 22–25(–27) x 5–6 µm], and in the number of transverse septa [(4–) 6 to 8 (–11[rarely]) versus (5–) 6], for Oedo. insidens and Oedo. pulchrum, respectively. As molecular data indicate that the presence or absence of vertical septa should be considered a sympleisiomorphic character state within the Hysteriaceae (Boehm et al. 2009), we feel justified in including both phragmospores and dictyospores within the genus Oedohysterium.
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| Date entered: | 03/11/2009 02:36:30 |
| Date of release: | 03/02/2010 03:27:54 |
| Entered by: | Dr. Eric Boehm
Kean University, Dept. Biology, United States |
| Herbarium number: | INB 0003466397 (holotype) |
| Collected by: | M. Oses, 2001 |
| Substrate: | bark of branch |
| Location: | Costa Rica, Guanacaste, Tempisque, National Park Palo Verde |
| Other related website | click me |
| SIM Manuscript Boehm et al 2010 | click me |
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