Phreodrilidae (Clitellata: Annelida) in north-western Australia with descriptions of two new species

Pinder, Adrian

doi:10.18195/issn.0312-3162.24(4).2008.459-468

Cited by 12 publications

(9 citation statements)

References 15 publications

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“…Once again, previously unstudied aquifers have revealed new taxa of Bathynellidae, confirming the trend of diversification observed for many other stygofaunal groups in the Pilbara, including the Bathynellidae sister family Parabathynellidae (Cho et al, 2005;Hong & Cho, 2009;Cho & Humphreys, 2010;Abrams et al, 2012), the Tainisopidae and Phreatoicidae isopods (Knott & Halse, 1999;Wilson, 2003;Keable & Wilson, 2006;Finston et al, 2009), oligochaetes (Pinder, 2008;Brown et al, 2015) and the Paramelitidae amphipods (Finston et al, 2007(Finston et al, , 2008(Finston et al, , 2011.…”

Section: De Grey River Bathynellidae Diversitysupporting

confidence: 65%

The role of allopatric speciation and ancient origins of Bathynellidae (Crustacea) in the Pilbara (Western Australia): two new genera from the De Grey River catchment

et al. 2019

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The stygofaunal family of Bathynellidae, is an excellent group to study the processes that shape diversity and distribution, since they have unknown surface or marine relatives, high level of endemism, and limited dispersal abilities. Recent research on Bathynellidae in Western Australia (Pilbara) has uncovered new taxa with unexpected distributions and phylogenetic relationships, but the biogeographical processes that drive their diversification on the continent are still unclear. By exploring the diversity, distribution, and Downloaded from Brill.com07/04/2020 07:01:03PM via free access divergence time of Bathynellidae in a setting such as the perched and isolated aquifers of the Cleaverville Formation in the north of the De Grey River catchment (Pilbara), we aim to test the hypothesis that vicariance has shaped the distribution of this family, specifically if one or multiple vicariant events were involved. We analysed the specimens collected from perched water in different plateaus of the Cleaverville Formation, combining morphological and molecular data from mitochondrial and nuclear genes. We described two new species and genera (Anguillanella callawaensis gen. et sp. nov. and Muccanella cundalinensis gen. et sp. nov.), and two additional taxa are recognised using morphology and/or Automatic Barcode Gap Discovery and Poisson Tree Processes species delimitation methods. New genera and species result restricted to isolate perched aquifers on single plateaus and their distributions, phylogenetic relationships, and divergence time estimates support multiple vicariant events and ancient allopatric speciation.

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Section: De Grey River Bathynellidae Diversitysupporting

confidence: 65%

The role of allopatric speciation and ancient origins of Bathynellidae (Crustacea) in the Pilbara (Western Australia): two new genera from the De Grey River catchment

et al. 2019

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“…In a morpho-cladistic analysis (Brinkhurst 1991), the intra-vestibular position of the female pores qualified as an autapomorphy of a monophyletic Astacopsidrilus, whereas Insulodrilus remained paraphyletic. The two genera in their current circumscription are problematic and in need of revision (Pinder & Brinkhurst 1997;Pinder 2008). A main difficulty here is the fact that the key character to distinguish the genera-the location of the female pore-is unknown in many species; it is not even known in the type species of both genera.…”

Section: Discussionmentioning

confidence: 99%

“…(The type species of Insulodrilus is Phreodrilus lacustris Benham, 1903, that of Astacopsidrilus is Astacopsidrilus notablis Goddard, 1909). Furthermore the distinction 'inside vs. outside the spermathecal vestibule' is a "character of degree" (Pinder 2008), and often quite subtle, especially when the female pores are located near the opening of the vestibule (compare Pinder & Brinkhurst 1997, Figs. 86, 90 for Insulodrilus with Pinder & Brinkhurst 1997, Figs.…”

Section: Discussionmentioning

confidence: 99%

“…The global distribution, which includes South America, Africa, the Arabian Peninsula, Sri Lanka, and subantarctic islands, indicates a Gondwanan origin of the family . Phreodrilids are mainly cool-adapted freshwater species; when recorded from warmer environments, their habitat is groundwater (Martínez-Ansemil et al 2002;Pinder 2008). There are also records from acid (dystrophic) peatland waters (Pinder & Brinkhurst 1997), from brackish water (Pinder & Erséus 2000), and from beech forest litter (Stout 1958)-the latter being the only record thus far documenting the presence of phreodrilids in a terrestrial habitat.…”

Section: Introductionmentioning

confidence: 99%

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Astacopsidrilus hibernicus sp. nov. (Phreodrilidae, Oligochaeta, Annelida) from Irish peatlands

et al. 2020

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The discovery of a large and flourishing population of Phreodrilidae in terrestrial peatlands in northwest Ireland was surprising on two counts: these oligochaete worms are usually aquatic and most of the species occur in the Southern Hemisphere. The phreodrilids were discovered in a project that targeted Enchytraeidae, therefore methods adapted to the investigation of enchytraeids could be applied, including the study of living animals and properly fixed whole mounts. DNA sequencing was also performed. All worms identified here belong to one species, new to science, and placed in the genus Astacopsidrilus, because of the ventral position of the spermathecal pores and the opening of the female funnels inside the spermathecal vestibule. Astacopsidrilus hibernicus sp. nov. is mainly distinguished by thick segmental cushions of epidermal gland cells on the dorsal side of the posterior body half. Male sexual organs and spermathecae are comparatively small and without the often-observed bizarre modifications common in species of this family. DNA sequencing yielded a fragment of the 16S rRNA gene. This is the first description of a phreodrilid species from Europe; the few previous recordings of this family in Ireland and the United Kingdom had been left unidentified.

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“…The relative abundance of eyeless Nais communis was higher in the perennial-gaining reach than in the other reaches (p \ 0.05, Scheffé tests). Types of Phreodrilidae; BM ventral bundles with one simple-pointed and one bifid crotchets; 2M ventral bundles with two simple-pointed crotchets; 2B ventral bundles with two bifid crotchets; the used nomenclature conformed to the last ICZN rules (Erséus et al 2008); (1) Brinkhurst and Jamieson (1971) (2001); (5) Kasprzak (1973); (6) Juget and Dumnicka (1986); (7) Nielsen and Christensen (1959); (8) Brinkhurst (1990);Pinder (2008); Pinder and Brinkhurst (1997); Pinder and Erséus (2000) EPI epigean, HYPO hypogean, DR desiccation resistance, U undetermined, NR non resistant, R resistant, TI total individuals, RA: relative abundance, FO frequency of occurrence…”

Section: Oligochaete Assemblage Compositionmentioning

confidence: 99%

Hyporheic annelid distribution along a flow permanence gradient in an alluvial river

Datry¹,

Lafont²,

Larned

2010

Aquat. Sci.

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In this study, we examined hyporheic annelid assemblages along a gradient of flow permanence (FP) and compared assemblages in gaining (groundwater-fed) and losing (runoff-fed) sections of the alluvial Selwyn River, New Zealand. To reduce the effects of poor taxonomic resolution, we used a dataset with most taxa identified to the genus or species level. We predicted that annelid assemblages would vary in structure and composition along FP gradients due to differences in desiccation resistance between taxa. We also predicted that groundwater-fed (gaining) and runoff-fed (losing) river sections would be inhabitated by dissimilar annelid assemblages due to differences in river-aquifer connections and recolonization sources. We found a negative relationship between taxon richness and FP, indicating that, on average, two annelid taxa are lost from hyporheic assemblages in the Selwyn River with every 10% decrease in FP. Low FP appears to favour annelid taxa that tolerate moist or dry conditions in sediments, as shown by a negative relationship between FP and the proportion of desiccation-tolerant taxa. A high proportion of hypogean taxa distinguished the groundwater-fed and perennial-gaining reach from the other reaches. In spite of the large differences in physical structure between the intermittent-gaining and the ephemeral-losing reach, we found few between-reach differences in annelid assemblages and, in particular, no differences in % hypogean taxa. These varied results illustrate the need to employ both categorical and continuous variables in ecological analyses: the combined categorical and gradient approach used in the present study is likely to explain more variability than either univariate approach alone.

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Phreodrilidae (Clitellata: Annelida) in north-western Australia with descriptions of two new species

Abstract: -Two new species of oligochaete (Clitellata: Annelida: Phreodrilidae)

Cited by 12 publications

References 15 publications

The role of allopatric speciation and ancient origins of Bathynellidae (Crustacea) in the Pilbara (Western Australia): two new genera from the De Grey River catchment

The role of allopatric speciation and ancient origins of Bathynellidae (Crustacea) in the Pilbara (Western Australia): two new genera from the De Grey River catchment

<p class="HeadingRunIn"><strong><em>Astacopsidrilus hibernicu</em><em>s</em> sp. nov. (Phreodrilidae, Oligochaeta, Annelida) from Irish peatlands</strong></p>

Hyporheic annelid distribution along a flow permanence gradient in an alluvial river

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