Corticolous on manawa (Avicennia marina subsp. resinifera). Associated with Lecanora c.f. carpinea, Bacidia sp., Opegrapha agelaeoides and Ramalina celastri.

Specimens fit here best using the New Zealand Lichen "Flora" (Galloway 2007) Caloplaca key. Apothecia orange, closely grouped, minute, up to 0.3 mm diameter; asci 8-spored, ascospores oval, 12.5 microns long, 7 microns wide, septum c. 4 microns thick (about one third spore length).

Voucher: UNITEC.

On the canopy branchlets of Metrosideros excelsa × M. robusta.

Apothecia with well developed exciple, ascospores dark ('buelloid'), 12.5-15 × 5-7 microns. Thallus K+ yellow (atranorin).

Specimen identified by A.J. Marshall 20 June 2023.

Occasional. Corticolous on tarahinau (Dracophyllum arboreum). Thallus pale cream brown, smooth and somewhat 'waxy'. Peritheca often paired, mutliple-chambered with shared ostioles. Ascospores submuriform, 5-7 transverse septate 32 x 12.5 µm.

Determination by A.J. Marshall from specimen (image of ascospores and drawing taken 26 April 2023).

Voucher: P.J. de Lange CH4389, UNITEC 14092.

Abundant. Saxicolous on undifferentiated Te Whanga Limestone. Thallus when fresh (moist) grey to grey-green, bearing numerous, erumpent, black, simple or fused perithecia. Ascospores red-brown, 3-septate, 23-26 × 6-8 μm in those measured.

When first noted on this island (12 February 2023 - see https://inaturalist.nz/observations/150552121) I had considered it uncommon. However on the day this observation was made (18 April 2023) the island had been subjected to rain showers for several days - all exposed limestone examined was covered in masses of this lichen.

Intriguingly it was not seen in any abundance on the adjacent shoreline of Te Whanga on the same substrate. I speculate the difference is that Motuhinahina has fewer mammalian predators, and as such supports a thriving sea bird population. I wonder if the guano they deposit encourages this lichen to flourish?

Voucher collected:

Common on limestone (undifferentiated Te Whanga limestone) - this specimen noted under a dense canopy of taupata (Coprosma repens). Identification confirmed from specimen collected - see https://inaturalist.nz/observations/157417883, https://inaturalist.nz/observations/150552121 for other records).

Abundant. Saxicolous on exposed limestone outcrops in sites subjected to salt water inundation / wave splash. Thallus oily black, much cracked, cracks more or less reticulate (deeply fissured, more obvious when dry - see last image). Perithecia immersed with only ostioles evident when wet, more conspicuous when dry - see last image). Ascospores ellipsoid, 12-16 × 7-8 µm.

Determination by A.J. Marshall 21 April 2023

Voucher: P.J. de Lange CH4465 & H. Tuanui-Chisholm, UNITEC 14229.

Saxicolous on undifferentiated Te Whanga Limestone. Abundant. Confined to sem--shaded and shaded rock exposures under a dense canopy of inihina (Melicytus chathamicus) and taupata (Coprosma repens). Thallus when fresh pinkish-grey, drying buff-yellow, copiously fertile, perithecia semi-immersed, ascospores muriform, hyaline, thin-walled, 18−25 × 7−8 µm. Hymenium I+ blue-green. Agreeing in all respects except ascospores thinner than suggested in descriptions (7−8 c.f. 11-17 µm).

Voucher: P.J. de Lange CH4466 & H. Tuanui-Chisholm, UNITEC 14230 (Duplicate: AK)

Determination by A.J. Marshall confirmed by D.J. Blanchon and P.J. de Lange.

Common. Corticolous on inihina (Melicytus chathamicus) and taupata (Coprosma repens).

Thallus dirty white, grey, lumpy but otherwise smooth and not cracked, apothecia 0.5-1.2 mm diameter, sessile or immersed, brown (not black as is usually the case for this species in New Zealand), rounded, subangular, radiating or stellate.
Ascospores 25 × 10 μm, colourless, ovoid-obovate, 5-septate.

As currently circumscribed for New Zealand Arthonia peraffinis is a variable species, especially with respect to apothecia size, shape and colour (brown or black). New Zealand "Arthonia peraffinis" would repay further taxonomic investigation.

Voucher collected.

Determination by A.J. Marshall.

Saxicolous on Te Whanga Limestone. Abundant - probably the most common saxicolous lichen on limestone on this island. Apothecia variable many grey-pruinose, otherwise agreeing with description of this species in the New Zealand Lichen "Flora" series.

I+ blue hymenium. Dark, 1 septate spores around 12 x 5 microns. Convex apothecia, rimmed at first then lacking at maturity

Voucher:

Determination by A.J. Marshall & D.J. Blanchon (23 February 2023). Images by A.J. Marshall from specimen collected on 12 February 2023

Saxicolous on Te Whanga Limestone. Uncommon (or more probaby just overlooked). Associated with Buellia albula, specimen agreeing with description of this species in the New Zealand Lichen "Flora" series and images of it on worldwide lichen websites.

Voucher:

Determination by A.J. Marshall (23 February 2023). Images by A.J. Marshall from specimen collected on 12 February 2023

Saxicolous on Te Whanga Limestone. Abundant - just extremely hard to collect as it was growing on smooth overhanging limestone flags. Specimen agreeing with description of this species in the New Zealand Lichen "Flora" series.

Voucher:

Determination by A.J. Marshall (23 February 2023). Images by A.J. Marshall from specimen collected on 12 February 2023

Corticolous on mahoe (Melicytus ramiflorus subsp. ramiflorus). Common.

Noted for Farewell Spit - Wharariki Bioblitz 2019.

Voucher: P.J. de Lange 14517 & T.J.P. de Lange, UNITEC 11201

First three images: P.J. de Lange in situ
Last four images: A.J. Marshall (11 November 2022)

= Fissurina dumastii Fée

New record for New Zealand (Marshall et al. in prep.). Morphological and chemistry details to come later.

Locally present on the bark and exposed roots of kahikatea (Dacrycarpus dacrydioides). Specimens copiously fertile.

Determination made by A.J. Marshall confirmed by R. Lücking (Berlin Natural History Museum).

Common on ramarama (Lophopmyrtus bullata).

As determined from specimen. Thallus papillate; apothecia with 4-10(-12) ostioles per verruca; asci 2-spored, ascospores broadly ellipsoid 220(-260) × 46(-18) μm, walls thick (c.16 μm) with zonation of inner wall conspicuous.

Corticolous (and muscicolous) on ramarama (Lophomyrtus bullata). Thallus diffuse, granular-edffuse, powdery, greyish, olivaceous, in places pale rusty brown, ochraceous; apothecia sessile, solitary or paired, confluent, 0.5-1.4 mm diameter, disc pale brown to dark brown, often centrally blemished dark chestnut brown, immarginate; hypothecium pale yellow-brown, c.340 μm thick; asci 4-8 spored, ascospores 20-septate, 155 × 2.5 μm, filiform, sinous. UV+ pale rust-red.

Voucher: P.J. de Lange UNITEC 13058

Determination by D.J. Blanchon, confirmed by A.J. Marshall and P.J. de Lange

Close match for type - see: https://artsandculture.google.com/asset/bapalmuia-buchanani-stirt-kalb-l-%C3%A5%C2%A4cking/QAEiNcTva34ybQ?fbclid=IwAR0LMKQVyoGFg2g6lekKCcR7iidmveMSJRi8Se6QWpgVA64TCXOZxz3B-28

Common on pine cones and bark of Pinus radiata and also in Ligustrum lucidum branches. Thallus olivaceous - greyish-green when fresh, areolate, minutely rugulose, margin with obvious black prothallus; apothecia sessile, brown-black, epithecium granular, blue-black, with obvious yellow-brown hypothecium; ascospores 10-18-septate, spirally curved, 65-89 x 2-4 microns.

Determination: A.J. Marshall 22 November 2021.

Voucher: P.J. de Lange 15150 & A.J. Marshall, UNITEC 13004