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 Add this item to the list  822920 Original description
   
Remarks (public):Penicillium uruguayensis belongs to section Lanata-Divaricata. Phylogenetically, it is located in a basal branch into P. javanicum clade (Visagie et al. 2015). This clade includes other sexually reproducing species, i.e. P. caperatum, P. elleniae, P. javanicum, P. malacosphaerulum and P. reticulisporum. Penicillium uruguayensis is characterized by having a good growth at 37 ºC on all media tested, by the production of acid on CREA and by its restrictive growth on DG18. Within P. javanicum clade, only P. elleniae and P. caperatum produce acid on CREA. However, these two latter species show ascospores with two longitudinal flanges or equatorial ridges (Visagie et al. 2015), which are inconspicuous and sub-equatorial in P. uruguayensis. In addition, P. caperatum has smooth ascospores, wherears in P. elleniae and P. uruguayensis they are spinose. The latter two can be differentiated by their conidial ornamentation, i.e. spinose in P. elleniae and smooth in P. uruguayensis. Penicillium malacosphaerulum and P. reticulisporum also have smooth conidia, but their ascospores are finely rough-walled with two longitudinal flanges. Penicillium javanicum and P. uruguayensis are the only species in the clade showing ascospores with inconspicuous longitudinal furrow but, unlike the other related species, P. javanicum produces roughened stipes.

LSU LT904730, ITS LT904729, BenA LT904699, CaM LT904698
 
Description type:Original description 
Description:Section Lanata-Divaricata Colony diameter in 7 d (mm) — On CYA: 25ºC 48–50, 30°C 54–56, 37°C 39–50; on MEA: 25ºC 44–47, 30°C 50–52, 37°C 42–45; on YES: 25ºC 53–55, 30ºC 54–56; 37°C 50–53; on OA: 25ºC 40–45, 30ºC 50–60, 37°C 40–45; on DG18: 25ºC 10–12; on CREA: 25ºC 10–12, weak acid production. Colony characters at 25º in 7 d — On CYA, colonies velvety, slightly raised at the centre, radially sulcate, mycelium brownish grey (7C2) to yellow (3A7), margin entire; reverse reddish brown (9F8) to greyish yellow (3B5); conidial sporulation absent; abundant production of cleistothecia; exudate present, consisting of small hyaline to yellow droplets along the sulcus; soluble pigment golden yellow (5B7). On MEA, colonies granular, flat, mycelium white, margin entire; reverse greyish yellow (4B5); abundant cleistothecia; conidial sporulation absent; exudate and soluble pigment absent. On YES, colonies somewhat cerebriform at the centre, radially sulcate towards the perifery, mycelium white; reverse brown (6E8); sporulation absent; exudate and soluble pigment absent. On OA, colonies granular, flat, mycelium white, margin entire; reverse light yellow (2A5); abundant production of cleistothecia; conidial sporulation scarce, with conidial masses dull green; exudate and soluble pigment absent. Micromorphology —Conidiophores only observed on OA, monoverticillate; stipes 20–50 x 2–2.5 μm, smooth-walled, hyaline. Phialides in verticils of three to four per verticili, ampuliform, 8–10 x 2–2.5 μm. Conidia globose to subglobose, 2–3 x 2.5–3 μm, smooth-walled, dull green. Cleistothecia observed after 1–2 wk on CYA, MEA and OA at 25 °C, superficial, globose, 90–210 µm diam, greyish yellow. Asci claviform to ovoid, 7–9 x 5–7 μm. Ascospores mostly subglobose, 3–3.5 × 3–4 μm, finely spiny, with conspicuously pleated sub-equatorial crests. 
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