Vermilacinia acicularis

Vermilacinia acicularis
Scientific classification
Kingdom: Fungi
Division: Ascomycota
Class: Lecanoromycetes
Order: Lecanorales
Family: Ramalinaceae
Genus: Vermilacinia
Species: V. acicularis
Binomial name
Vermilacinia acicularis

Vermilacinia acicularis is a fruticose lichen that occurs in the Channel Islands of California.[1] The type specimen was collected from San Clemente Island. Other specimens have been collected from Santa Barbara Island and Anacapa Island.[1]

Distinguishing features

Vermilacinia acicularis is classified in the subgenus Vermilacinia in which it is distinguished by the rounded outline of the thallus with clumps of basal lobes (or branches). The thallus size varies from 5–10 mm in diameter.[1] Basal branches are loosely united and frequently divided dichotomously into similar branches, the ultimate branchlets have tiny isidia-like branchlets, or true isidia, that distinguishes the species from others in the subgenus.

The thallus of Vermilacinia acicularis has a cortex up to 100 microns thick. Lichen substances are primarily of the following three terpenes that are characteristic of the subgenus Vermilacinia: an unknown referred to as “T3”, (-)-16 α-hydroxykaurane, and zeorin. No accessory substances reported. Reproductive features include pynidia (conidium); apothecia unknown.[1]

Taxonomic history

Vermilacinia acicularis was described in 1996. It has alternatively been treated in the genus Niebla under a broader species concept, N. ceruchoides, without explanation.[2] Niebla differs from Vermilacinia by the cortex differentiated into two layers,[3] by the development of chondroid strands in the medulla,[4] and by the absence of the diterpene (-)-16 α-hydroxykaurane and the tritepene zeorin.[4] Vermilacinia ceruchoides differs from V. acicularis by the absence of isdia, and by the branches arising from a less defined basal area that become shortly bifurcate near apex. The whole thallus sometimes intricately branched throughout.[1]

References

  1. 1 2 3 4 5 Spjut, R. W. Niebla and Vermilacinia (Ramalinaceae) from California and Baja California. Sida Miscellany 14
  2. ↑ Bowler, P. and J. Marsh. 2004. Niebla. Lichen Flora of the Greater Sonoran Desert 2: 368–380
  3. ↑ Bowler, P.A. 1981. Cortical diversity in the Ramalinaceae. Canad. J. Bot. 59: 437–453; abstract N. homalea group, on page 448 the other two groups, N. combeoides group and the N. ceruchis group indicated to represent another evolutionary line.
  4. 1 2 Spjut R. W. 1995. Vermilacinia (Ramalinaceae, Lecanorales), a new genus of lichens. In: Flechten Follmann; Contr. Lichen in honor of Gerhard Follmann; F. J. A. Daniels, M. Schulz & J. Peine, eds., Koeltz Scientific Books: Koenigstein, pp. 337-351.

External links

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