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Polychaeta taxon details

Lobatocerebridae Rieger, 1980

869064  (urn:lsid:marinespecies.org:taxname:869064)

accepted
Family
Lobatocerebrum Rieger, 1980 (type by original designation)
marine, brackish, fresh, terrestrial
recent only
Rieger, Reinhard M. (1980). A new group of interstitial worms, Lobatocerebridae nov. fam. (Annelida) and its significance for metazoan phylogeny. <em>Zoomorphologie.</em> 95(1), 41-84., available online at https://doi.org/10.1007/bf01342233
page(s): 76 [details]   
Read, G.; Fauchald, K. (Ed.) (2018). World Polychaeta database. Lobatocerebridae Rieger, 1980. Accessed at: http://www.marinespecies.org/polychaeta/aphia.php?p=taxdetails&id=869064 on 2019-02-16
Date
action
by
2016-02-03 21:07:19Z
created

original description Rieger, Reinhard M. (1980). A new group of interstitial worms, Lobatocerebridae nov. fam. (Annelida) and its significance for metazoan phylogeny. <em>Zoomorphologie.</em> 95(1), 41-84., available online at https://doi.org/10.1007/bf01342233
page(s): 76 [details]   

additional source Rieger, Reinhard M. 1988. Comparative ultrastructure and the Lobatocerebridae: keys to understanding the phylogenetic relationship of Annelida and the acoelomates. Microfauna Marina 4: 373-382.
page(s): 374 [details]   

additional source Rouse, G.W.; Fauchald, K. (1995). The articulation of annelids. <em>Zoologica Scripta.</em> 24(4), 269-301., available online at http://dx.doi.org/10.1111/j.1463-6409.1995.tb00476.x
page(s): 274; note: relation to annelids discussed. Excluded from their analysis [details]   

additional source Haszprunar, Gerhard, Rieger, Reinhard M. and Schuchert, Peter 1991. Extant 'Problematica' within or near Metazoa, in A.M. Simonetta and S. Conway Morris eds., The early evolution of Metazoa and the significance of problematic taxa. Proceedings of an International Symposium held at the University of Camerino, March 27-31, 1989: Cambridge, Cambridge University Press, p. 99-105.
note: Create Phylum Lobatocerebromorpha for the species Lobatocerebrum psammicola [details]   

additional source Weigert, Anne; Bleidorn, Christoph. (2016). Current status of annelid phylogeny. <em>Organisms Diversity & Evolution.</em> 16(2): 345-362., available online at https://doi.org/10.1007/s13127-016-0265-7
page(s): p.8; note: overview [details]   

additional source Laumer, Christopher E.; Bekkouche, N.; Kerbl, A.; Goetz, F.; Neves, R.; Sørensen, M.; Kristensen, R.; Hejnol, A.; Dunn, C.; Giribet, G.; Worsaae, K. (2015). Spiralian Phylogeny Informs the Evolution of Microscopic Lineages. <em>Current Biology.</em> 25(15): 2000-2006., available online at https://doi.org/10.1016/j.cub.2015.06.068
note: authors: "using 402 orthologs mined from genome and transcriptome assemblies of 90 taxa. Lobatocerebrum and Diurodrilus are found to be deeply nested members of Annelida [details]   

additional source Kerbl, Alexandra; Bekkouche, Nicholas; Sterrer, Wolfgang; Worsaae, Katrine. (2015). Detailed reconstruction of the nervous and muscular system of Lobatocerebridae with an evaluation of its annelid affinity. <em>BMC Evolutionary Biology.</em> 15(1): 34pp., available online at https://doi.org/10.1186/s12862-015-0531-x
note: also new species described as L. riegeri [details]   
From editor or global species database
Classification Lobatocerebridae, which have as at end 2015 just two formally described species, are interstitial annelids without chaetae or segmentation. They are hermaphroditic deposit feeders, "microscopic, thread-like, fully ciliated animals with glandular epidermis, living interstitially between sand grains in the subtidal sandy sea-floor" (Kerbl et al 2015), and were first found off North Carolina in shallow water sediments, and monotypic until a second species, found in the Gulf of Aqaba, was formally described in 2015. "Lobatocerebromorpha" was treated as a phylum by G. Haszprunar, R. M. Rieger, and P. Schuchert (1991), and placed next to the Annelida and Sipunculida.
Rouse & Fauchald (1995:274) summarised the then knowledge as follows: "Lobatocerebrum was originally described as an annelid (Rieger 1980), possibly related to the clitellates (but see Brinkhurst 1982: 1044), though they have few macroscopic 'annelid' features. Rieger (1980) reported the nephridia to be metamerically arranged, and used other cytological evidence for placing the family among the annelids. Rieger (1988: 378-379) discussed the relations among the lobatocerebrids and various groups, including annelids and acoelomate phyla, but left the position of the family undetermined. Rieger (1991) described the sperm of the lobatocerebrids as having an acrosomal tube and mitochondrial derivatives between the centrioles and the nucleus, the former present only in clitellates (Ferraguti 1983; Jamieson el al. 1987). The structures of the sperm represent potential synapomorphies for lobatocerebrids and clitellates. This implies that the absence of so many other annelid features in Lobatocerebrum are losses, or, alternatively, that they are the most plesiomorphic members of the clitellate clade. The Lobatocerebridae require further investigation."
Laumer et al (2015) use the name Lobatocerebromorpha informally and found that "using 402 orthologs mined from genome and transcriptome assemblies of 90 taxa. Lobatocerebrum and Diurodrilus are found to be deeply nested members of Annelida".
Kerbl et al (2015) described the anatomy of a new species, L. riegeri, the 2nd to be formally named, in great detail, using advanced techniques such as immunohistochemistry, confocal laser scanning microscopy, and TEM

Weigert & Bleidorn (2016 p8) summarized phylogeny knowledge as follows: "Lobatocerebrum had originally been described as an annelid lineage (Rieger 1980, 1981). Recent investigations of the epidermis, nervous and muscular system of Lobatocerebrum riegeri using transmission electron and confocal microscopy are in line with this initial assessment (Kerbl et al. 2015). As typical for annelids, a mid-ventral nerve could be found; even though as typical for interstitial groups the overall morphology was not only similar to other interstitial annelids, but also meiofaunal members of Platyhelminthes or Gnathostomulida. However, a placement within annelids was confirmed by a phylogenomic analysis, which groups them as sister taxon of Amphinomida + Sipuncula (Laumer et al. 2015)." [details]