Nálezy podle období
Dysderidae 0-19001901-19501951-20002001-2021
Dysdera cechica Řezáč, 2018 Není ohrožený 1x 1x 31x 16x 49x

Dysdera cechica Řezáč, 2018

České jménošestiočka vidlozubá
Stupeň ohroženíNení ohrožený
Nálezy49 nálezů, 25 kvadrátů
Poslední nález 2021 , Vlastimil Růžička, Jan Dolanský

Literatura

 © Ondřej Machač
Pavouci České republiky; Druhy rodu Dysdera (Dysderidae) v Česku; Pholcus alticeps na severozápadě České republiky; Díky osobnímu automobilu; Výprava za stepníky a teplomilnými křižáky na jižní Moravu; Významné nálezy pavouků z ČR IV. / Remarkable records of spiders from Czechia IV.; Inventarizace 2017; Hrabalky (Pompilidae) – specialisté na lov pavouků II: rod Cryptocheilus; Jak dlouho vydrží Dolomedes pod vodou?; Rozloučení se Zdeňkem; Říkali jsme mu „haldový expert“; Zoologické dny Praha 2018; Arachnologická exkurze Litovelské Pomoraví; Česká bibliografie 2018; Britská bibliografie – The Newsletter 140 a 141; Pokyny pro autory

 © Oto Zimmermann

The genus Dysdera Latreille, 1804, a species-rich group of spiders that includes specialised predators of woodlice, contains several complexes of morphologically similar sibling species. Here we investigate species limits in the Dysdera erythrina (Walckenaer, 1802) complex by integrating phenotypic, cytogenetic and molecular data, and use this information to gain further knowledge on its origin and evolution. We describe 16 new species and redescribe four poorly known species belonging to this clade. The distribution of most of the species in the complex is limited to southern France and the north-eastern Iberian Peninsula. The species studied do not show any obvious differences in habitat preference, and some of them even occur sympatrically at certain sites. They probably feed on the same type of prey as they readily capture woodlice. On the other hand, they differ in body size, mouthparts shape, sculpturing of carapace, morphology of the copulatory organs, karyotype and DNA sequences. Experimental interspecific mating showed a partial precopulatory behavioural barrier between Dysdera erythrina and Dysdera cechica, sp. nov. Our data suggest that karyotype evolution of the complex included chromosome fusions and fissions as well as translocations (between autosomes as well as autosomes and sex chromosomes). We hypothesise that chromosome rearrangements generating reproductive incompatibility played a primary role in speciation within Dysdera complexes. Dysdera spiders are poor dispersers, and their original distribution areas (forested areas in the Mediterranean) were repeatedly fragmented during Quarternary climatic oscillations, facilitating integration of chromosome rearrangements into karyotypes by genetic drift. Sympatric occurrence of closely related species may have been promoted by prey segregation as suggested by differentiation in body size in co-occurring species. The following new species are described: D. catalonica, sp. nov., Dysdera cechica, D. dolanskyi, sp. nov., D. fabrorum, sp. nov., D. garrafensis, sp. nov., D. graia, sp. nov., D. kropfi, sp. nov., D. minairo, sp. nov., D. portsensis, sp. nov., D. pradesensis, sp. nov., D. pyrenaica, sp. nov., D. quindecima, sp. nov., D. septima, sp. nov., D. stahlavskyi, sp. nov., D. tredecima, sp. nov. and D. undecima, sp. nov.



Fotografie

Statistiky

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Dle nadmořské výšky


Dle metody sběru (49 použitých nálezů)
Dysdera cechica Řezáč, 2018 ESSamciSamiceMláďataNálezy
Zemní past23212225
Individuální sběr3508
Prosev1202
Neurčeno38012
Smyk2002
 SamciSamiceMláďataNálezy

Dle biotopu (49 použitých nálezů)
Dysdera cechica Řezáč, 2018 ESSamciSamiceMláďataNálezy
Neurčeno3141618
Suché louky1062
Kamenolomy0101
Suché křoviny3103
Lesostepní doubravy4002
Lesy0101
Suché doubravy8909
Paseky0201
Dubohabřiny8605
Porosty borůvek2001
Lesní okraje1001
Suťové a roklinové lesy1001
Ovocné sady s luční vegetací0101
Interiéry budov0101
Acidofilní bory1001
Kamenité suti nižších poloh0001
 SamciSamiceMláďataNálezy