PDD 96105 – Septoria exotica Speg.
Data provider:
New Zealand Fungarium - Te Kohinga Hekaheka o Aotearoa
Barcode:
PDD 96105
Specimen type:
Packet
Loan status:
Active
Database record added:
03 August 2012
Database record updated:
24 February 2023
Components
Primary component
Active identification
Determined name:
Septoria exotica
Determiner:
J.A. Cooper
Identification date:
2010-12-16 (Verbatim: 2010/12/16)
Preferred name:
Septoria exotica Speg.
Division:
Ascomycota
Class:
Dothideomycetes
Order:
Mycosphaerellales
Family:
Mycosphaerellaceae
Identification type:
Determination
Associations:
has host Hebe speciosa
Substrate:
live leaf
Other components
Active identification
Determined name:
Hebe speciosa
Determiner:
J.A. Cooper
Identification date:
2010-12-16 (Verbatim: 16/12/2010)
Preferred name:
Veronica speciosa R.Cunn. ex A.Cunn.
Division:
Tracheophyta
Class:
Magnoliopsida
Order:
Lamiales
Family:
Plantaginaceae
Identification type:
Determination
Collection events
Primary collection event
Collection event type:
Field
Standard locality
Location:
Lincoln, CASC
Georeferences:
Latitude and Longitude (WGS84):
-43.6408 172.476
Verbatim locality:
Lincoln, CASC
Verbatim collector:
J.A. Cooper
Standardised collector:
J. A. Cooper
Collectors reference no.:
JAC11680
Verbatim date:
2010/12/16
Start date:
2010-12-16
Country:
New Zealand
New Zealand Area Codes:
Mid Canterbury
Native lands:
Ngāi Tahu
Georeferences:
New Zealand Map Grid:
2467910E 5729545N (WGS84 -43.640362 172.478213)
Habitat:
Garden
Specimen flags
Anamorph state:
anamorph
Specimen notes
Public Note:
conidia 0-2 septate, length=14.3-22.4µm (µ=19.1, σ=2.4), width=0.9-1.4µm (µ=1.1, σ=0.2), Q=10.1-25.7µm (µ=17.3, σ=4.6), n=9. CBS163.78 (Boesewinkel, Hebe speciosa, 1977, Auckland), sequenced. This is S. exotica sensu stricto, not Phaeophleospora atkinsonii (=Kirramyces hebes). The latter on brown lesions 3-5mm, conidia pale brown, and the latter on finally white lesions, often with purple/brown raised margin 1-3(4) mm and hyaline conidia.
[JAC Feb. 2022] New Zealand has two morphologically different leaf spot species on Hebe, with different sequences. Septoria exotica on lesions 1-3mm, pale grey necrotic centre, with sharply defined margin, conidia hyaline, 20-30um x 1.um wide (reference sequences KF251418 Boesewinkel, 1977; OL653047=ICMP23744, Cooper, 2020) .
Pseudophaeophleospora atkinsonii larger lesions 3-8mm diam, brown and less sharply defined margins, conidia yellowish-brown and 25-45 x 2.5um (reference sequence GU214643=ICMP 17860, Hill 2013).
Septoria exotica was described by Spegazzini from a garden plant in Buenos Aries of the New Zealand plant Hebe speciosa, and he comments the species is common in Europe. The New Zealand version might be different but it seems likely we exported Septoria exotica with the host plants in cultivation to Europe and South America.
Pseudophaeospora atkinsonii is one of a number of phylogenetically related endophytes that are commonly isolated in Hebe, Coprosma, Kunzea. They often appear when trying to isolate leaf spot fungi of different species.
In a recent paper ...
https://doi.org/10.1016/j.simyco.2017.09.003
They synonimise Pseudophaeophleospora atkinsonii with Septoria exotica on the basis of ICMP 17860 which was always identified as P. atkinsonii. There is no real substantiating evidence to support the asserted synonymy. The two species are not synonyms! A similar error was made with Mycospharella coacervata.
J.A. Cooper
J.A. Cooper
Assigned reference numbers
JA Cooper Fungarium:
JAC11680
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