Phylogenomic analyses reveal a Palaeozoic radiation and support a freshwater origin for clitellate annelids

Erséus, Christer; Williams, Bronwyn W.; Horn, Kevin M.; Halanych, Kenneth M.; Santos, Scott R.; James, Samuel W.; Châtelliers, Michel Creuzé des; Anderson, Frank E.

doi:10.1111/zsc.12426

Cited by 40 publications

(67 citation statements)

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“…We have analyzed only one representative of Haplotaxidae and, keeping in mind that haplotaxids are a paraphyletic group, we cannot generalize the data obtained. However, the species studied belongs to Haplotaxide sensu stricto, and the "Tubifex" type of its ovary corresponds to that transcriptomic study (Erséus et al, 2020) and indicates the close relation of haplotaxids sensu stricto to the lumbriculids + branchiobdellids + hirudinids clade.…”

Section: Germ-line Cysts and Internal Ovary Structure In Comparisonsupporting

confidence: 74%

“…leruthi forming the sister group to Metagynophora, and H . gordioides as a sister group to these, with Lumbriculidae, Branchiobdellida, and Hirudinida as intervening groups (Figure 1; Erséus et al, 2020). We have analyzed only one representative of Haplotaxidae and, keeping in mind that haplotaxids are a paraphyletic group, we cannot generalize the data obtained.…”

Section: Discussionmentioning

confidence: 99%

“…The next haplotaxid genera should be analyzed to find out if the organization of their gonads in fact reflects suggested evolutionary affinities, especially in the context of paraphyly in the Haplotaxidae (Erséus et al, 2020). Currently, we can state only that the "Tubifex" ovaries in the Haplotaxis species studied and several other microdriles seem to be the most widespread form of ovaries in microdriles and allied taxa (Figure 1; Gorgo n et al, Świątek et al, 2012;Urbisz et al, 2018, Urbisz et al, 2015Urbisz & Świątek, 2013;Urbisz et al, 2010).…”

Section: Germ-line Cysts and Internal Ovary Structure In Comparisonmentioning

confidence: 99%

“…More recent molecular analyses confirmed that Haplotaxidae are the closest relatives to Crassiclitellata, although as a paraphyletic assemblage (Anderson et al, 2017; Martinez‐Ansemil, Creuzé Des Châtelliers, Martin, & Sambugar, 2012). Finally, a broad phylogenetic assessment based on transcriptomic genetic data (Erséus et al, 2020) showed that haplotaxids are not monophyletic and that some of them cluster either with Crassiclitellata or Moniligastridae (earthworm‐sized terrestrial non‐crassiclitellates). The third haplotaxid group, that is, Haplotaxidae sensu stricto, which is restricted to Haplotaxis species with a gizzard associated with a predatory lifestyle, clusters in turn with the group including Lumbriculidae, Branchiobdellida, and Hirudinida (Figure 1).…”

Section: Introductionmentioning

confidence: 99%

“…See text for more details. Tree topology after Erséus et al (2020) oocytes detach to the coelom (in enchytraeids and phreodrilids), or oocyte growth occurs exclusively outside the ovaries within the cysts freely floating in the body cavity (in naidinae naidids; Gorgo n et al, Świątek et al, 2018;Świątek, Pinder, & Gajda, 2020;Urbisz et al, 2017).…”

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confidence: 99%

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Microorganization of ovaries and oogenesis of Haplotaxis sp. (Clitellata: Haplotaxidae)

Urbisz

Martin

Lagnika

et al. 2020

Journal of Morphology

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Ovaries of Haplotaxis sp. were studied in active and nonactive states, that is, in a sexually mature specimen and in specimens outside of the reproductive period. Two pairs of ovaries were found in segments XI and XII. Especially in the nonactive state, they were in close contact with copulatory glands. Each ovary was composed of germ cells interconnected with syncytial cysts, which were enveloped by a layer of somatic cells. Within cysts each germ cell had one ring canal connecting it to the common anuclear cytoplasmic mass called a cytophore. During oogenesis clustering germ cells differentiated into nurse cells and oocytes; thus, the oogenesis was recognized as meroistic. Vitellogenic oocytes were detached from the ovaries and continued yolk absorption within the body cavity. Because recent studies have shown the variety of ovaries and germ line cyst organization in clitellates and suggest their evolutionary conservatism at the family or subfamily level, the data presented here can be valid in understanding the phylogenetic relationships among Clitellata. In this context, ovaries found in Haplotaxis sp. resembled those of the "Tubifex" type. "Tubifex" ovaries are characteristic for numerous microdrile taxa (tubificines, limnodriloidines, propappids, lumbriculids, and leech-like branchiobdellids) and can be regarded as the primary character for these Clitellata in which germ-line cysts are formed during early oogenesis. As the family Haplotaxidae is currently considered to be paraphyletic and the species studied here belongs to Haplotaxidae sensu stricto, our results support the close relationship of Haplotaxidae sensu stricto to the clade consisting of Lumbriculidae, Branchiobdellida, and Hirudinida, in which lumbriculids are sister to the latter two.

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Section: Germ-line Cysts and Internal Ovary Structure In Comparisonsupporting

confidence: 74%

Section: Discussionmentioning

confidence: 99%

Section: Germ-line Cysts and Internal Ovary Structure In Comparisonmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Microorganization of ovaries and oogenesis of Haplotaxis sp. (Clitellata: Haplotaxidae)

Urbisz

Martin

Lagnika

et al. 2020

Journal of Morphology

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Ovary micromorphology and oogenesis in a rhyacodriline oligochaete (Clitellata: Naididae, Rhyacodrilinae)

Świątek

Rodríguez

Małota

et al. 2022

Journal of Morphology

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The main goal of the article is to describe the ovary organization and oogenesis in Peristodrilus montanus, an aquatic oligochaete of the subfamily Rhyacodrilinae. The presented analysis will not only enrich the knowledge about how eggs are formed but, because of the suggested conservatism of ovary organization in clitellate annelids, can contribute to disentangling the complex phylogenetic relationships of the rhyacodrilines within Naididae. The paired, conically shaped ovaries are located in segment XI. They are composed of a dozen or so syncytial germ‐line cysts, which are associated with somatic cells. Each germ cell in a cyst has one intercellular bridge that joins it to a central and anuclear cytoplasmic mass, the cytophore. This pattern of cyst organization is typical for all clitellates that have been studied to date. Initially, the germ cells in a cyst undergo a synchronous development, however, there is no synchrony between cysts, and therefore there is a developmental gradient (oogonia, pre‐diplotene germ cells, germ cells in diplotene) of oogenesis along the long ovary axis. The cysts are composed of a maximum of 32 cells. Cysts with cells in diplotene detach from the ovaries and the extraovarian phase of oogenesis begins. The developmental synchrony is lost, one cell (an oocyte) per cyst starts to gather cell components and yolk and grows considerably. The remaining cells grow to some extent and function as nurse cells. Like in other microdriles, P. montanus oocytes are rich in yolk; other features of oogenesis are also similar to those that are known from other microdrile taxa. The system of ovary organization found in the studied species is broadly similar to the corresponding features known from Naidinae and Phreodrilidae and, to some extent, in Enchytraeidae. However, this system is different from the one that is known in Tubificinae, Limnodriloidinae and Branchiurinae.

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Independent acquisition of sulfide tolerance in a population of tubificine worms: a habitat extension for the Limnodrilus hoffmeisteri complex

et al. 2023

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Phylogenomic analyses reveal a Palaeozoic radiation and support a freshwater origin for clitellate annelids

Cited by 40 publications

References 147 publications

Microorganization of ovaries and oogenesis of Haplotaxis sp. (Clitellata: Haplotaxidae)

Microorganization of ovaries and oogenesis of Haplotaxis sp. (Clitellata: Haplotaxidae)

Ovary micromorphology and oogenesis in a rhyacodriline oligochaete (Clitellata: Naididae, Rhyacodrilinae)

Independent acquisition of sulfide tolerance in a population of tubificine worms: a habitat extension for the Limnodrilus hoffmeisteri complex

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