A phylogenetic analysis of Tubificinae and Limnodriloidinae (Annelida, Clitellata, Tubificidae) using sperm and somatic characters

Ferraguti, Marco; Erséus, Christer

doi:10.1046/j.1463-6409.2002.00117.x

Cited by 21 publications

(11 citation statements)

References 42 publications

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“…First, a particular focus on spermatozoal ultrastructure and 'spermiocladistics' (Jamieson, 1987a) during the last 20 years has proved beneficial for inferring clitellate relationships. Clitellate spermatozoa show several synapomorphic features (see, e.g., Jamieson, 1986;Ferraguti, 2000), but also a great variation that has been explored in numerous papers (e.g., Garavaglia et al, 1974;Jamieson, 1978Jamieson, , 1982Jamieson, , 1983Jamieson, , 1984Jamieson, , 1987aJamieson, , 1987bBraidotti & Ferraguti, 1982;Jamieson et al, 1983Jamieson et al, , 1987Ferraguti, 1984Ferraguti, , 2000Ferraguti et al, 1989Ferraguti et al, , 1994Ferraguti & Gelder, 1991;Westheide et al, 1991;Erse´us & Ferraguti, 1995;Westheide & Purschke, 1996;Cardini et al, 2000;Gelder & Ferraguti, 2001;Marotta et al, 2003). These studies demonstrate that sperm often carry a phylogenetic signal that is congruent with that of other morphological data.…”

Section: Relationships Revealed By Morphological Datamentioning

confidence: 99%

Phylogeny of oligochaetous Clitellata

Erséus

2005

Hydrobiologia

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Clitellata, with more than one third of all annelid species described, is briefly introduced, and an overview of the hypotheses of phylogenetic relationships among the groups traditionally referred to as oligochaetes is given. The presentation is placed in a historical context and describes the trend to move from intuitive, narrative approaches to more formal analyses of character patterns. Monophyly of the earthworms (the megadriles, or Metagynophora sensu Jamieson), or at least a major part of them (Crassiclitellata sensu Jamieson), and paraphyly of the 'microdrile' largely aquatic, groups are supported by both morphological and molecular data. Further, DNA sequences as well as spermatozoal ultrastructure corroborate that all leech-like taxa (Hirudinida, Acanthobdellida and Branchiobdellida) constitute a clade derived within 'Oligochaeta', closely related to the family Lumbriculidae. Molecular systematic studies also support relationships already identified on the basis of morphological data, e.g., the position of Naididae within Tubificidae, the position of Phreodrilidae close to, but outside, the same family, and the putative sistergroup relationship between the newly discovered Capilloventridae and the rest of Clitellata. A recent study using 18S rDNA suggests that Enchytraeidae is closely related to Metagynophora, and that these two taxa, which contain all terrestrial oligochaetous clitellates, form a clade derived from aquatic 'microdriles' This refutes a recent hypothesis proposing that the ancestor of Clitellata was terrestrial. To a great extent, however, the basal resolution of the oligochaetous clitellates remains unclear.

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Section: Relationships Revealed By Morphological Datamentioning

confidence: 99%

Phylogeny of oligochaetous Clitellata

Erséus

2005

Hydrobiologia

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“…Since the last review on the sperm of Clitellata by Ferraguti (1999a,b), there have been two further publications on sperm of taxa in this clade (Ferraguti et al, 1999;Marotta et al, 2003). These papers have provided further evidence of the utility of sperm based characters for the phylogenetic analysis of clitellates.…”

Section: Recent Descriptions Of Annelid Sperm Ultrastructurementioning

confidence: 99%

Annelid sperm and fertilization biology

Rouse

2005

Hydrobiologia

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It is largely accepted that features such as parental care of young (brooding) and complex fertilization biology are derived features, having always evolved from simple reproductive methods such as external fertilization with no parental involvement in offspring survival. This is reflected in the continued use of words such as 'primitive' and 'modified' sperm. I will review cases where these terms are fundamentally misleading and reiterate calls for their abandonment. An update on the published ultrastructural descriptions of sperm in annelids since the reviews by Ferraguti (1999a) and Rouse (1999a) is provided. The structure of spermatozoa across Annelida in relation to phylogenetic hypotheses for the group is reviewed. It is concluded that until an adequate understanding of the root placement for the tree of Annelida is discovered then we cannot infer the plesiomorphic sperm and fertilization mode in the group. The fascinating fertilization mechanisms of Serpulidae are discussed. New ultrastructural data on sperm and spermathecae in the group is presented. The variability of sperm in Spirorbinae is marked and given that the fertilization mechanism is similar across the group this provides an unprecedented opportunity to correlate sperm structure with function. Hydrobiologia (2005) 535/536: 167-178

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“…Within Clitellata the ultrastructure of spermatozoa has proved useful for phylogenetic assessment, not only at high taxonomic levels (Jamieson, Erséus & Ferraguti, 1987; Ferraguti & Erséus, 1999), but also at lower taxonomic levels, among species of branchiobdellids (Cardini & Ferraguti, 2004), enchytraeids (Westheide, Purschke & Middendorf, 1991), and tubificids (Marotta, Ferraguti & Erséus, 2003). Nevertheless, in a study of tubificid relationships based on sperm morphology, Erséus & Ferraguti (1995) pointed out that at low taxonomic levels ‘the spermatozoal character patterns are complex and contain elements of convergence and probably also reversal, and therefore they should be used … [in tubificids] … only in combination with other information’.…”

Section: Introductionmentioning

confidence: 99%

Combined-data phylogenetics and character evolution of Clitellata (Annelida) using 18S rDNA and morphology

Marotta

Ferraguti

Erséus

et al. 2008

Zoological Journal of the Linnean Society

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This is the first phylogenetic analysis of Clitellata using 18S rDNA in combination with morphological data of a selection of species representing Hirudinida, Acanthobdellida, Branchiobdellida, and eight oligochaetous families. The morphological data set includes 48 somatic (light-microscopical) and 34 spermatozoal (ultrastructural) characters. Eight new sperm models belonging to Lumbriculidae (two), Enchytraeidae (two), Phreodrilidae (one), and Tubificidae (three) are compared with the spermatozoal pattern already described among Clitellata. Somatic characters for each species are extracted from both general literature and the original species description. One new 18S sequence of Lumbriculidae and two of Tubificidae are reported, and are aligned together with corresponding sequences of 36 previously studied clitellate taxa. Two polychaete species are used as outgroups. The phylogenetic trees recovered using parsimony and Bayesian inference as optimization criteria of both individual and combined data sets yield largely consistent results. Our combined-data phylogenetic analysis is congruent with recent molecular studies. Somatic and spermatozoal characters contribute to the 18S rDNA phylogeny under both optimization criteria: in resolving the 18S topology, in adding new nodes, and in increasing the support for many groups. Morphological characters in combination with 18S rDNA suggest the following sister-group relationships:(1) between Acanthobdella and Hirudinida, with Branchiobdellida as their plesiomorphic sister group, and (2) between enchytraeids and Propappus, with both taxa grouping at the base of a large assemblage containing Lumbricidae, Lumbriculidae, Branchiobdellida, Acanthobdella, and Hirudinida. Maximum parsimony and maximum likelihood ancestral character state reconstructions on the combined-data tree indicate a new set of somatic and spermatozoal autapomorphies, and propose new evolutionary trends of somatic and spermatological characters. The observed complexity of the spermatozoal characters patterns among oligochaetous clitellates is discussed. This analysis supports a trend from primarily aquatic forms, with bifid chaetae indefinite in number, towards a more terrestrial mode of life leading to a simplification of the chaetae, thus supporting the hypothesis that the first clitellate was an aquatic form.

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A phylogenetic analysis of Tubificinae and Limnodriloidinae (Annelida, Clitellata, Tubificidae) using sperm and somatic characters

Cited by 21 publications

References 42 publications

Phylogeny of oligochaetous Clitellata

Phylogeny of oligochaetous Clitellata

Annelid sperm and fertilization biology

Combined-data phylogenetics and character evolution of Clitellata (Annelida) using 18S rDNA and morphology

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