Fungalpedia – Note 102 Halodiatrype
Halodiatrype Dayar. & K.D. Hyde
Citation when using this entry: Apurillo et al., in prep – Fungalpedia, mangrove-associated fungi. Mycosphere.
Index Fungorum, Facesoffungi, MycoBank, GenBank, Fig. 1
Halodiatrype was introduced based on the analysis of combined ITS and β-tub sequence data. Halodiatrype species formed a distinct clade within the family Diatrypaceae, with good support (Dayarathne et al. 2016). This genus has ascomata that are dark brown to black, globose to subglobose with ostioles and papillae (Dayarathne et al. 2016). The peridium is thick and composed of multiple layers of brown cells fused with the host cells. The asci are cylindrical to clavate, 8-spored, and without an apical ring (Dayarathne et al. 2016). Ascospores are oblong to allantoid, light brown, slightly curved and smooth-walled (Dayarathne et al. 2016). Halodiatrype species share morphological similarities with the type species of Cryptosphaeria, however, they formed distinct clades in a phylogenetic tree (Dayarathne et al. 2016). The type species of Halodiatrype, H. salinicola, was isolated as a saprobe on decaying wood in a mangrove stand (Dayarathne et al. 2016). Halodiatrype mangrovei and H. avicenniae were also isolated as saprobes on mangroves (Hyde 1993, Dayarathne et al. 2016). Halodiatrype mangrovei was introduced by Hyde (1993) as Cryptosphaeria mangrovei, but was transferred to Halodiatrype based on morphology as it closely resembles the type species of Halodiatrype. However, there was no molecular data to support this placement and further studies are needed to confirm its classification. There are no reports of Halodiatrype species other than from mangrove ecosystems.
Type species: Halodiatrype salinicola Dayar. & K.D. Hyde
Other accepted species:
Halodiatrype avicenniae Dayar. & K.D. Hyde
Halodiatrype mangrovei (K.D. Hyde) Dayar. & K.D. Hyde
Figure 1 – Halodiatrype salinicola (MFLU 15-0179, holotype, redrawn from Dayarathne et al. 2016) a Ascomata on host. b Transverse section of ascoma on host. c-d Asci. e-g Ascospores. Scale bars: c-d = 10 µm, e-g = 5 µm. (Photo credits: MC Dayarathne & KD Hyde)
References
Dayarathne M, Phookamsak R, Hyde KD, Manawasinghe IS et al. 2016 – Halodiatrype, a novel diatrypaceous genus from mangroves with H. salinicola and H. avicenniae spp. nov. Mycosphere 7, 612–627.
Hyde KD. 1993 – Cryptosphaeria mangrovei sp. nov. (Diatrypaceae) from intertidal mangrove wood. Transactions of the Mycological Society of Japan 34, 311–314.
Entry by
Apurillo CCS Center of Excellence in Fungal Research, Mae Fah Luang University, Mueang Chiang Rai, Chiang Rai, Thailand
(Edited by Chayanard Phukhamsakda & Kevin D. Hyde)