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 Add this item to the list   822232 Original description
   
Remarks (public):Cadophora antarctica, recovered from a soil sample contaminated with diesel in King George Island (Antarctica), displays the typical features of a psychrotrophic organism: has an optimal temperature of growth at 15ºC and is not able to grow over 25ºC. Cadophora antarctica differs from all previously known species of the genus because displays a holoblastic conidiogenesis, forming conidiophores morphologically similar to cladosporium-like taxa. 
Description type:Original description 
Description:Mycelium composed of hyaline to olivaceous-brown, smooth to verrucous, thin- to thick-walled, septate, anastomosing hyphae, 2‒4 µm wide. Conidiophores mostly reduced to a short chain of ramoconidia on a scar, laterally or terminally disposed on a recurved or compressed coiled hyphae, rarely well-developed, simple, stalked, erect or decumbent, up to 200 µm long, up to 4 µm broad. Ramoconidia holoblastic, one-celled, rarely two-celled, brown to dark brown, sometimes inequilaterally coloured, with one side darker than the opposite, in longitudinal chains of up to six, smooth- and thick-walled, lemon-shaped, flask-shaped, clavate or nearly cylindrical, 5‒13 x 2‒4 µm, with one basal and up to four apical scars. Conidia holoblastic, one-celled, brown to dark brown, inequilaterally coloured, being one side darker than the opposite, disposed in long, simple or ramified chains, with up to four small-sized scars, smooth- and thick-walled, mostly broadly lens-shaped but inequilateral due to one side more flattened than the another one, 4‒5 x 3‒4 µm.
Colonies on MEA after three weeks at 15°C reaching a diam. of 52‒54 mm, velvety, zonate, successively light grey (1D1), dark brown (6F4), medium grey (1E1), dark grey (1F1), pale grey (1B1) and greyish-brown (5E3) from the center towards the edge; exudates absent; diffusible pigment absent; sporulation abundant; reverse successively greyish-orange (5B3), greyish-brown (5E2), grey (7E1) and orange white (5A2) from the center towards the edge. Colonies on MEA after three weeks at 5°C of 17-18 mm in diam., flat, floccose, form greyish-orange (5B3) at center and to yellowish-grey (4B2) at the edge; exudates absent; diffusible pigment absent; sporulation absent; reverse pale orange (5A3) at center and yellowish-grey (4B2) at the edge. Colonies on OA after three weeks of incubation at 15°C of 44‒45 mm in diam., flat, floccose at the center, greyish-brown (6D3) at the center and brownish-orange (5C4) at the edge; exudates absent; diffusible pigment absent; sporulation sparse; reverse greyish-brown (6D3) at the center and light grey (1D1) at the edge. Colonies on PDA after three weeks at 15°C, reaching a diam. of 39‒41 mm, floccose, slightly elevated, zonate, yellowish-brown (5F8) at the center, yellowish-white (1A2) in an intermediate area, and golden yellow (5B7) towards the edge; exudates absent; diffusible pigment absent; sporulation abundant; reverse yellowish-white (1A2). Minimum temperature of growth, 5°C; optimum temperature of growth, 15°C; maximum temperature of growth, 25°C.
 
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