Description and ecological notes on Isoctenus malabaris sp. nov. (Araneae, Ctenidae) from southern Brazil

Polotow, Daniele; Brescovit, Antônio D.; Ott, Ricardo

doi:10.1590/s0073-47212007000200011

Cited by 7 publications

(11 citation statements)

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“…Isoctenus Bertkau, 1880: 61. Type species Isoctenus foliiferus Bertkau, 1880, by monotypy; Pickard‐Cambridge, 1897; Mello‐Leitão, 1936; Bonnet, 1957: 2311–2312; Lehtinen, 1967: 241; Silva, 2003; Polotow et al. , 2005, 2007; Platnick, 2008.…”

Section: Taxonomymentioning

confidence: 99%

“…Isoctenus malabaris Polotow et al. , 2007: 216, figs 1–5 (male holotype and female paratype from Centro de Pesquisas e Conservação da Natureza Pró‐Mata (29°28′21″S, 50°09′25″W), São Francisco de Paula, Rio Grande do Sul, Brazil, 02.i.2001, R. Ott, deposited in MCN 39321, examined; paratypes with same data as holotype: 3 males and 3 females, deposited in IBSP 51957, 51958; MCTP 17142, 17143; MZSP 25327, 25328, examined).…”

Section: Taxonomymentioning

confidence: 99%

“…Lehtinen (1967) considered Isoctenus as an independent genus and removed it from synonymy of Ctenus . Currently, ten species are described in this genus (Polotow, Brescovit & Ott, 2007; Platnick, 2008).…”

Section: Introductionmentioning

confidence: 99%

“…Diagnosis: Isoctenus malabaris resembles I. strandi by the morphology of tibia and presence of two small apical spines in male palp (Polotow et al. , 2007, figs 1, 2) and morphology of the spermathecae in the epigynum (Polotow et al. , 2007, figs 3–5), but can be distinguished by conical ventral branch of RTA, slender dorsal branch of RTA, elongated embolus (Fig.…”

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confidence: 99%

“…, 2007, figs 3–5), but can be distinguished by conical ventral branch of RTA, slender dorsal branch of RTA, elongated embolus (Fig. 19D) and robust median apophysis in male palp (Polotow et al. , 2007, figs 1, 2) and by the oval median field projected posteriorly and short lateral spurs in the epigynum (Polotow et al.…”

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confidence: 99%

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Revision and cladistic analysis ofIsoctenusand description of a new neotropical genus (Araneae, Ctenidae, Cteninae)

Polotow

Brescovit

2009

Zoological Journal of the Linnean Society

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A cladistic analysis was applied to test the monophyly of the genus Isoctenus. The data matrix comprised 28 taxa scored for 53 morphological and two behavioural characters. The analysis resulted in two equally parsimonious trees of 89 steps. The strict consensus was used to discuss the relationships of Isoctenus and related Cteninae genera. Ctenopsis Schmidt is synonymized with Isoctenus. Isoctenus foliifer Bertkau, I. strandi Mello‐Leitão, I. eupalaestrus Mello‐Leitão, I. janeirus (Walckenaer), I. coxalis (Pickard‐Cambridge), I. corymbus Polotow, Brescovit & Pellegatti‐Franco and I. malabaris Polotow, Brescovit & Ott are maintained in Isoctenus. Four species currently included in Ctenus are transferred to Isoctenus: I. griseolus (Mello‐Leitão) comb. nov., I. taperae (Mello‐Leitão) comb. nov., I. herteli (Mello‐Leitão) comb. nov. and I. minusculus (Keyserling) comb. nov. The following specific names are synonymized: Ctenus sanguineus Walckenaer, C. semiornatus Mello‐Leitão and Ctenopsis stellata Schmidt with Isoctenus janeirus (Walckenaer), Ctenus mourei Mello‐Leitão with Isoctenus herteli (Mello‐Leitão) and Ctenus pauper Mello‐Leitão with Isoctenus strandi Mello‐Leitão. Isoctenus sigma Schenkel, described from French Guiana, is transferred to Ctenus. Four species are newly described: Isoctenus areiasp. nov. from Paraíba, Brazil, I. charada sp. nov. and I. segredo sp. nov. from Paraná, Brazil, and I. ordinario sp. nov. from south and south‐eastern Brazil and north‐eastern Argentina. Isoctenus latevittatus Caporiacco is considered species inquirenda. Parabatingagen. nov. is proposed to include Ctenus brevipes Keyserling. The following synonymies are established: Ctenus taeniatus Keyserling, C. tatarandensis Tullgren, C. anisitsi Strand, C. atrivulvus Strand, C. mentor Strand, C. brevipes brevilabris Strand, Isoctenus masculus Mello‐Leitão and Ctenus birabeni Mello‐Leitão with Parabatinga brevipes (Keyserling) comb. nov. © 2009 The Linnean Society of London, Zoological Journal of the Linnean Society, 2009, 155, 583–614.

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Section: Taxonomymentioning

confidence: 99%

Section: Taxonomymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Revision and cladistic analysis ofIsoctenusand description of a new neotropical genus (Araneae, Ctenidae, Cteninae)

Polotow

Brescovit

2009

Zoological Journal of the Linnean Society

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Systematics and biogeography of Spinoctenus, a new genus of wandering spider from Colombia (Ctenidae)

Hazzi

Polotow

Brescovit

et al. 2018

Invert. Systematics

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Among ctenid spiders, ctenines comprise the most diverse subfamily. In this study, a new genus of Cteninae, Spinoctenus, is proposed to include the type species S. yotoco, sp. nov. Ten new species are also described: S. escalerete, S. pericos, S. eberhardi, S. spinosus, S. stephaniae, S. nambi, S. florezi, S. tequendama, S. chocoensis and S. flammigerus. Results of the parsimony and Bayesian phylogenetic analyses using morphological and behavioural characters indicate the monophyly of this genus, closely related to Phoneutria Perty, 1883 and Ctenus Walckenaer, 1805. This genus can be distinguished from the remaining Ctenidae by three unambiguous synapomorphies: embolus with folded process, tegulum with median process, and RTA curved internally close to the cymbium. A dispersal-vicariance biogeographical analysis of the genus in the Andean and Chocó regions indicates the origin of Spinoctenus in the Western and Central Andean Cordilleras. From this region, three events of dispersal occurred to the other regions (one to the Chocó and two to the Eastern Cordillera), which were subsequently followed by three events of vicariance, suggesting that dispersal and vicariance were equally important in shaping the current distribution patterns of Spinoctenus species. The discovery of this new genus containing a large number of new species in the Andean and Chocó regions highlights the current poor knowledge of the Colombian biodiversity. http://zoobank.org/urn:lsid:zoobank.org:pub:A7DA044C-8A59-4FAE-8F3B-00D3D2498820

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Tracking dietary habits of cave arthropods associated with deposits of hematophagous bat guano: A study from a neotropical savanna

et al. 2014

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Carbon and nitrogen stable isotopes were used to track major dietary variations in arthropods found in a cave located in a neotropical savanna in Central Brazil. We determined the δ 13 C and δ 15 N for cave crickets, cockroaches, spiders, guano of a hematophagous bat, and leaf litter found on the ground near the cave entrance. The δ 13 C and δ 15 N for the cricket and cockroaches showed that bat guano was not the only food item for these arthropods. They had intermediate δ 13 C and δ 15 N between bat guano and leaf litter, which means that they consumed additional food resources other than guano in their diet, independent of distribution of guano deposits in the cave.The spiders, predators with great mobility, seemed to not have a preferential diet item since their isotope signals indicated they hunt both crickets and cockroaches. The δ 13 C of the bat guano (−15.4‰) indicated that the diet of these hematophagous bats relied on animals fed with C4 plants. The conversion of native savanna vegetation of which the debris is mostly from C3 plants, to pasture, based on C4 African grass, a remarkably common land use transformation in the region, is indirectly influencing the diet of hematophagous bats, which basically relied on exotic fauna. The C and N stable isotope ratios showed that the arthropods inside the cave do not rely solely on bat guano for their diet, but interact directly with the external environment, through litter debris, indicating a significant exchange of energy and matter between the cave environment and the surrounding area.

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Description and ecological notes on Isoctenus malabaris sp. nov. (Araneae, Ctenidae) from southern Brazil

Cited by 7 publications

References 1 publication

Revision and cladistic analysis ofIsoctenusand description of a new neotropical genus (Araneae, Ctenidae, Cteninae)

Revision and cladistic analysis ofIsoctenusand description of a new neotropical genus (Araneae, Ctenidae, Cteninae)

Systematics and biogeography of Spinoctenus, a new genus of wandering spider from Colombia (Ctenidae)

Tracking dietary habits of cave arthropods associated with deposits of hematophagous bat guano: A study from a neotropical savanna

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