Prisotnost pajka dinarske vrste rodu Mesostalita (Deeleman-Reinhold, 1971) (Arachnida: Araneae: Dysderidae) v Beneških Predalpah (SV Italija)

Abstract

Mesostalita is a genus of woodlouse hunter spiders (Arachnida: Araneae: Dysderidae), currently including three species: M. nocturna, M. kratochvili, and M. comottii. These are cave-dwelling species, endemic to the Dinarides. The genus distribution range is examined, focusing on published localities. In particular, the presence of Mesostalita in the Julian Prealps (NE Italy) is investigated by researching previous reports from the area. A new record, Foran di Landri cave, is reported, representing the fourth known occurrence of the genus in the area. A brief description and some photographs of the female specimen found in the cave are provided. Following this finding, the genus distribution range must be extended northwards to include the Julian Prealps, on the other side of the Isonzo-Soča river (representing a biogeographical barrier for many cave-dwellers), opposite to the Dinarides. This makes Mesostalita one of the few troglobitic north-western Dinaric genera living on both sides of the river. Further sampling in caves in the area (to find at least a male individual) and molecular analyses are necessary to clarify the proper, specific status of specimens living in the Julian Prealps and their phylogenetic relationships within the genus.Mesostalita je rod lovskih pajkov (Arachnida: Araneae: Dysderidae), trenutno so opisane tri vrste: M. nocturna, M. kratochvili in M. comottii. To so jamske vrste, endemične za Dinarsko gorovje. Proučeno je bilo območje razširjenosti pajkov tega rodu s poudarkom na objavljenih najdiščih. Natančneje, prisotnost pajkov rodu Mesostalita v Beneških Predalpah (SV Italija) je bila raziskana s proučevanjem prejšnjih poročil z navedenega območja. Poročamo o novem najdišču v jami Foran di Landri, ki pomeni četrto znano najdišče pajkov tega rodu na navedenem območju. Navedeni so kratek opis in nekaj fotografij samice, najdene v jami. Po tej ugotovitvi je treba območje razširjenosti pajkov tega rodu razširiti proti severu in vanj vključiti Beneške Predalpe na drugi strani Soče (to za mnoga jamska bitja pomeni biogeografsko oviro), nasproti Dinarskega gorovja. Tako so pajki rodu Mesostalita eni redkih troglobiontov med pajki severozahodnih dinarskih rodov, ki živijo na obeh straneh reke. Potrebni so še nadaljnje vzorčenje v jamah na navedenem območju (da bi našli vsaj še samca) in molekularne analize za razjasnitev pravilnega, specifičnega statusa osebkov, ki živijo v Beneških Predalpah, in njihovih filogenetskih odnosov znotraj rodu

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ZRC SAZU Publishing (Znanstvenoraziskovalni center - Slovenske akademije znanosti in umetnosti)

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