Reproductive isolation among three populations of the genus Grammostola from Uruguay (Araneae, Theraphosidae)

Postiglioni, Rodrigo; Costa, Fernando Guilherme Perazzo

doi:10.1590/s0073-47212006000100013

Cited by 9 publications

(11 citation statements)

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“…) and behaviour. As such, it is the integration of the genetic, phylogenetic and phenotypic results, including behavioural differences (Costa & Pérez‐Miles ; Postiglioni & Costa ) which suggests that G. anthracina as currently understood is composed of two species; one corresponding to the black morph and other to the brown‐reddish morph. Even when the black morph and the brown‐reddish morph clades show internal structure, most of these subclades lack significant support and, more importantly, there are not morphologic differences among them.…”

Section: Resultsmentioning

confidence: 99%

“…coexisting at the same locality. Postiglioni & Costa () suggested that the absence of overlapping is mainly due to ecological factors. We also consider that usually theraphosids have poor vagility (Ferretti et al .…”

Section: Discussionmentioning

confidence: 99%

“…Females and juveniles are burrowers, while the males are the more vagile sex, dispersing in search of females during the mating season. Grammostola anthracina has two known allopatric colour morphs: black populations in the north of Uruguay and brown‐reddish in the south of the country, both apparently separated by the Negro river; however, Postiglioni & Costa () suggested that the isolation of both morphs is due to ecological factors. Previous studies have shown behavioural differences between these colour morphs in copulatory duration and insertion patterns (Costa & Pérez‐Miles ; Postiglioni & Costa ).…”

Section: Introductionmentioning

confidence: 99%

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An integrative approach for species delimitation in the spider genus Grammostola (Theraphosidae, Mygalomorphae)

D’Elı́a

Pérez‐Miles

2015

Zoologica Scripta

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approach for species delimitation in the spider genus Grammostola (Theraphosidae, Mygalomorphae). -Zoologica Scripta, 45, 322-333. The mygalomorph genus Grammostola (family Theraphosidae) is endemic to South America. The species Grammostola anthracina is one of the largest spiders in Uruguay and reputed to be the longest lived tarantula in the world. This nominal species has two distinct colour morphs comprising black and reddish-brown forms with controversial taxonomic status. Here, we present a phylogenetic study based on molecular characters (cytochrome c oxidase subunit I) of haplotypes of G. anthracina and closely related species. Our analysis together with new morphological data and biogeographical information indicates that the two morphs of G. anthracina constitute different species that are not sister to each other. Consequently, a new species, Grammostola quirogai is described, diagnosed and illustrated to encompass the black morph. Phylogenetic relationships and new taxonomic characters for Grammostola species included in this study are discussed.

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Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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An integrative approach for species delimitation in the spider genus Grammostola (Theraphosidae, Mygalomorphae)

D’Elı́a

Pérez‐Miles

2015

Zoologica Scripta

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“…Additionally, current biogeographical barriers such as the Uruguay River between Argentina and Uruguay, and the Negro River within Uruguay (Fig. 1), could be important causes of divergence among the groups analyzed (Postiglioni & Costa 2006).…”

Section: Discussionmentioning

confidence: 99%

“…Although it is difficult to identify geographic factors that cause these variations and to separate these factors from genotypic effects, it is known that local and clinal variations in genitalic characters do exist (Lachaise et al 1981;Hribar 1994;Tatsuta & Akimoto 1998;Kelly et al 2000;Jennions & Kelly 2002;Tatsuta et al 2001). Studies performed in different groups of insects and arachnids have shown that populations of a single species can begin differentiating both morphologically and genetically as a result of allopatric distribution, reaching reproductive isolation afterwards (Yamashita & Polis 1995;Postiglioni & Costa 2006;Holwell 2008).…”

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confidence: 99%

Morphometry and geographical variation of Bothriurus bonariensis (Scorpiones: Bothriuridae)

Olivero¹,

Mattoni²,

Peretti³

2012

Journal of Arachnology

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Diversification of morphological characteristics among geographically separated populations is particularly important in understanding evolutionary processes and is considered the early stage of allopatric speciation. In the present study, we investigated geographic variation in scorpion populations of Bothriurus bonariensis (Koch 1842). Our principal goal was to compare different populations of this species with regard to its distribution, analyzing somatic and genitalic characters. In Argentina, specimens of B. bonariensis from Entre Rios and Corrientes Provinces are dark brown, while specimens from La Pampa have reddish coloration. Scorpions of this species from Brazil and south of Uruguay are totally black. Also, we observed variability in body size, some morphological characteristics of adult specimens (e.g., prosoma length, hand height, hand width, and telson height), and genitalic traits (e.g., hemispermatophore lamina length, basal and distal lamina width, dorsal fold length). Results indicate the presence of evident geographic variation: populations from Argentina show similar morphological patterns that differ from populations from Uruguay. We discuss these data in the context of the current phylogeographical and evolutionary knowledge of this species.

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Microgeographic population structuring in a genus of California trapdoor spiders and discovery of an enigmatic new species (Euctenizidae: Promyrmekiaphila korematsui sp. nov.)

Starrett,

Jochim,

Quayle

et al. 2024

Ecology and Evolution

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The recognition and delineation of cryptic species remains a perplexing problem in systematics, evolution, and species delimitation. Once recognized as such, cryptic species complexes provide fertile ground for studying genetic divergence within the context of phenotypic and ecological divergence (or lack thereof). Herein we document the discovery of a new cryptic species of trapdoor spider, Promyrmekiaphila korematsui sp. nov. Using subgenomic data obtained via target enrichment, we document the phylogeography of the California endemic genus Promyrmekiaphila and its constituent species, which also includes P. clathrata and P. winnemem. Based on these data we show a pattern of strong geographic structuring among populations but cannot entirely discount recent gene flow among populations that are parapatric, particularly for deeply diverged lineages within P. clathrata. The genetic data, in addition to revealing a new undescribed species, also allude to a pattern of potential phenotypic differentiation where species likely come into close contact. Alternatively, phenotypic cohesion among genetically divergent P. clathrata lineages suggests that some level of gene flow is ongoing or occurred in the recent past. Despite considerable field collection efforts over many years, additional sampling in potential zones of contact for both species and lineages is needed to completely resolve the dynamics of divergence in Promyrmekiaphila at the population–species interface.

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Reproductive isolation among three populations of the genus Grammostola from Uruguay (Araneae, Theraphosidae)

Cited by 9 publications

References 4 publications

An integrative approach for species delimitation in the spider genus Grammostola (Theraphosidae, Mygalomorphae)

An integrative approach for species delimitation in the spider genus Grammostola (Theraphosidae, Mygalomorphae)

Morphometry and geographical variation of Bothriurus bonariensis (Scorpiones: Bothriuridae)

Microgeographic population structuring in a genus of California trapdoor spiders and discovery of an enigmatic new species (Euctenizidae: Promyrmekiaphila korematsui sp. nov.)

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