Cladonia aff. sphacelata Vain. (1887: 456)

Yánez-Ayabaca, A., Ahti, T. & Bungartz, F., 2013, The Family Cladoniaceae (Lecanorales) in the Galapagos Islands, Phytotaxa 129 (1), pp. 1-33: 25-26

publication ID

http://doi.org/ 10.11646/phytotaxa.129.1.1

persistent identifier

http://treatment.plazi.org/id/9360F21A-087B-7732-FF05-FBEFFAAEF82F

treatment provided by

Felipe

scientific name

Cladonia aff. sphacelata Vain. (1887: 456)
status

 

Cladonia aff. sphacelata Vain. (1887: 456)  

( Fig. 6c View FIGURE 6 )

Primary thallus persistent, of laciniate squamules, esorediate, epruinose; podetia common, grayish green becoming deep brown in parts (melanotic), elongate, 1–5 cm tall; moderately branched; branching pattern irregular anisotomic, mainly dichotomous, rarely trichotomous; axils closed; tips often divided in 2–6 branchlets; ascyphose; surface ecorticate, apically initially with granules becoming larger and branching into microsquamules, eventually developing into narrow and laciniate basal squamules; esorediate; pycnidia with hyaline jelly; apothecia not seen.

Spot tests and chemistry: P+ yellow, K+ yellow, C−, KC−, UV−; thamnolic acid (according Ahti (2000), the spot test reactions and chemistry correspond to chemotype I; no other chemotype has so far been confirmed for the Galapagos).

Distribution and ecology: New to Ecuador and Galapagos; known from Isabela and Santa Cruz Island; all specimen from the humid zone, growing on the ground in fern-sedge vegetation.

Notes: This species is characterized by repeatedly branched podetia with tips often divided in 2–6 (–10) branchlets and a surface densely covered in narrow squamules. The identification of this species is somewhat provisional. Ahti (2000) reported it only from Brazil. However, since then Ahti & Sipman (2013a, 2013b) have reported it from the Guiana Highlands, even segregating two new species off it in the same area. The identity of the Galapagos material is thus not completely clear and molecular studies might help to elucidate it.

Selected specimens examined: ECUADOR. GALAPAGOS: Isabela Island, Volcán Sierra Negra, South side of Sierra Negra crater, trail to Alemania , 0°51’17.60”S, 91°8’55.2”W, 924 m, humid zone, on rock, 16 Aug 2008, Clerc, P. 08- 249, 08-198, 08-197 ( CDS 40103 View Materials , 40052) GoogleMaps   , 40051), Bungartz , F. 8349 ( CDS 40995 View Materials )   . Santa Cruz Island, along trail from Media Luna to El Puntudo , 0°39’0”S, 90°20’2.9”W, 740 m, humid zone, on bark, 8 Oct 2008, Clerc, P. 08-118, 08-125B ( CDS 39972 View Materials , 46960) GoogleMaps   , eastern slope below the summit of El Puntudo , 0°38’42”S, 90°20’14”W, 780 m, humid zone, on soil, 28 Feb 2006, Aptroot, A. 64672 ( CDS 31246 View Materials ) GoogleMaps   .

covered in a variety of propagules like true soredia, granules, microsquamules, even squamules (Nugra 21, scale 3 mm).

CDS

Charles Darwin Research Station