Observation 34793: Parmelinopsis minarum (Vainio) Elix & Hale
When: 2010-03-13
Herbarium specimen reported

Notes: Location: 35°12’38.36"N, 85°54’0.40"W, el. 587 m, Beckwith’s Point Trail.

Substrate and habitat: Growing on the boles of forest trees within a few m of the ground, in oak-hickory woodland on the western rim of the Cumberland Plateau.

Chemistry:
cortex: C-, K-, KC-, Pd- [K+ pale yellow expected]
medulla: C+ pinkish red (immediately, then fading and disappearing in a few sec), K-, KC+ reddish (immediately, then fading and disappearing in a few sec), Pd+ pale buffy yellow (slowly)

Identification: Densely isidiate, corticolous shield lichen of modest size, with sparse axillary cilia and black lower cortex, lightening to brown under marginal lobes. The medulla is C+ pinkish red, KC+ reddish, but both reactions are fleeting. The curvy outlines of the outer lobes and densely isidiate center of the shield are distinctive. Similar species include Parmelinopsis horrescens (isidia with cilia, medulla C-) and Myelochroa obsessa (saxicolous; medulla white, yellowish, or orange; medulla K+ yellow, Pd+ orange) (Hinds and Hinds, 2005, pp.325 and 342—343).

References:
Sharnoff’s Parmelinopsis minarum gallery
CNALH images, description, and locality map, and a larger, interactive locality map.

Voucher specimen:
United States, Tennessee, Franklin County, Sewanee, Beckwith’s Point Trail. 13 Mar 2010. Chris Parrish 0077, det. James C. Lendemer (NY).

Common name: hairless-spined narrow-shield. Parmelinopsis minarum is so named to contrast with Parmelinopsis horrescens, which is called the hairy-spined narrow-shield. However, as far as names go, narrow-shield is weak, hairless-spined dubious, and someone missed a bet in not leveraging off of horrescens in some graphic way (e.g., horrific narrow-shield).

Species Lists

Images

81114
thallus, 10x
81115
thallus, 12.5x
81116
isidiate surface, 7.1x
81117
isidiate surface, 10x
81118
isidiate surface, 12.5x
81119
isidia, 20x
81120
isidia, 40x
81121
isidia, 40x
81122
isidia, 63x
81123
axillary black cilia, 50x
81124
axillary black cilia, 80x
81125
axillary cilia, 50x
81126
marginal cilia, 63x
81127
apothecial rim, 32x
81128
apothecial rim, 32x
81129
apothecial rim, 40x
81130
apothecial rim, 40x
81131
lower cortex, 63x
81132
lower cortex, 115x
81133
black lower cortex, 100x
81134
black lower cortex, 110x

Proposed Names

85% (1)
Eye3 Eyes3
Used references: Hinds and Hinds, 2005, pp.342—344

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Eye3 = Observer’s choice
Eyes3 = Current consensus

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Created: 2010-03-14 01:11:09 MST (-0700)
Last modified: 2010-06-09 01:04:10 MDT (-0600)
Viewed: 242 times, last viewed: 2017-06-06 18:18:19 MDT (-0600)
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