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Polycephalomyces ramosus (Hypocreales, Ascomycota) an interesting troglophilic entomogenous fungus, new for Croatia

Matočec, Neven; Ozimec, Roman; Kušan, Ivana (2012) Polycephalomyces ramosus (Hypocreales, Ascomycota) an interesting troglophilic entomogenous fungus, new for Croatia. In: 21st International Conference on Subterranean Biology, 2–7 September, 2012, Košice, Slovakia (2012 - 7 September 2012) Košice, Slovačka.

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Abstract

During the regular monitoring on Veternica cave (Mt. Medvednica, Croatia) performed in cooperation of Croatian Biospeleological Society experts and Natural Park Medvednica, particular synnematous entomogenous fungus parasitizing on imago of subtroglophilic fly Heteromyza sp. (Heleomyzidae, Brachycera, Diptera) has been found. Specimens, found in the dark zone of the cave were sampled, microclimate data recorded and photo documentation performed. The fungus is identified as Polycephalomyces ramosus (Peck) Mains (Hypocreales, Ascomycota) according to the Seifert’s monograph on stilbellaceous fungi. This anamorphic ascomycetous fungus is often found in caves, living as a hyperparasite on entomogenous fungi viz. Hirsutella guignardii, Cordyceps barnesii and C. entomorrhiza. Relying on data compiled in form of preliminary checklist of Croatian cave fungi, this species is considered as first record for the Croatian mycobiota. This first finding of Polycephalomyces ramosus parasitizing on Heteromyza fly, give us opportunity to perform in situ morphological and ecological assessment and to work on its taxonomical status. Similarly to Cordyceps riverae treated in previous detailed ecological research, Polycephalomyces ramosus too is always found to produce fruitbodies (in this case synnemata) at extremely high air humidity (100%) and condensed water regularly appears on the surface of both synnemata and host bodies. Air temperature (10° C) is also constant ecological factor occurring in such large cave as Veternica, without daily fluctuations and negligible seasonal fluctuations. Both Polycephalomyces ramosus and Cordyceps riverae are members of the same order and may well be rather closely related, especially due to their common subterranean and cavernicolous habitat where they parasitize or hyperparasitize on adult stages of arthropods and both do not require sunlight for completion of their whole life cycle. They are therefore able to live constantly inside cave habitats. However, final conclusions on both taxonomical and ecological issues will be possible only after planned molecular research focused on these troglophilic fungal species.

Item Type: Conference or workshop item published in conference proceedings (UNSPECIFIED)
Uncontrolled Keywords: Ascomycota; cave fungi; Diptera; monitoring; mycobiota of Croatia
Subjects: NATURAL SCIENCES
NATURAL SCIENCES > Biology
Divisions: Division for Marine and Enviromental Research
Projects:
Project titleProject leaderProject codeProject type
Ekološko modeliranje za održivo upravljanje resursima[25590] Tarzan Legović098-0982934-2719MZOS
Depositing User: Ivana Kušan
Date Deposited: 29 Sep 2015 13:29
Last Modified: 29 Sep 2015 13:29
URI: http://fulir.irb.hr/id/eprint/2120

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