When: 2021-05-18

Collection location: Hi Mountain Lookout Rd., San Luis Obispo Co., California, USA [Click for map]

(coordinates hidden from public) 787m

Who: Skullroy (mdmulroy21@gmail.com)

No specimen available

Thallus gray-brown, matte, areolate, with tall areoles that are fairly blocky. Larger areoles ~1mm diam. Apothecia few, black, immersed, some with a raised thalline rim. Pycnidia abundant, frequently with thick thalline rim also. Thin black hypothallus present around margins. Largest apothecia ~0.6 mm diam Micro: Hymenium ~145 um tall (in 2 other measured aps got closer to 110, but less certain about those measurements), hyaline, subhymenium at deepest point ~85 um, slightly brownish. Conidia 8, 13, 12, 11, 12,10,13 um long.

Update 5/18/21: Smaller ap: hymenium measured ~110 um. Paraphyses moniliform, with upper ~4 cells subglobose, apical cell: 4.5-5.5 um (2 measured).

Spores: large, ovoid, hyaline, 8/ascus: 22×13, 23×12, 24×13, 22×14, 29×15, 22×13 micrometers.

Chemistry: Thallus tissue VERY strongly K+R norstictic acid


Thallus strongly K+R norstictic acid
Ascus measured
unusually large spore (all others we smaller)

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Add Comment
Added santamonicae to MO Names
By: J-Dar
2021-05-29 10:50:45 CDT (-0400)

Figured we might as well call it what it is! I saw your notes that you split this specimen from Aspicilia pacifica in the same collection, two K+R species together, pretty cool!

I think this is excellent habitat for it
By: Jason Hollinger (jason)
2021-05-18 20:47:25 CDT (-0400)

I bet it goes a good deal farther north. But I agree, it looks like a perfect match to me, too. Cool! I’ve never run across this one before.

Same here!
By: Skullroy (mdmulroy21@gmail.com)
2021-05-18 20:05:14 CDT (-0400)

This would be my first time with santamonicae but it really does seem to match up well with the species description and keys there! For what it’s worth the thallus also matches pretty well with the photo on CNALH. This seems like a pretty far north record for santamonicae but the elevation/habitat/substrate fits well (siliceous sandstone in chaparral, ~800m elevation).

Looks like this keys to A. santamonicae
By: Jason Hollinger (jason)
2021-05-18 19:44:19 CDT (-0400)

Is that what you find, too? Do you have experience with santamonicae?