Feinstruktur pigmentierter und unpigmentierter Photoreceptoren bei Proseriata (Plathelminthes)

Sopott‐Ehlers, Beate

doi:10.1111/j.1463-6409.1984.tb00017.x

Cited by 21 publications

(11 citation statements)

References 24 publications

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“…Our findings on the monophyly of the Ncodermata confirm earlier findings by Ehlers (1984Ehlers ( , 1985a, Brooks, O'Grady & Glen (1985) and Rohde (1990) using mainly morphological data, by Bavcrstock et al (1991), Blair (1993) and using partial 18s rDNA sequenccs, and those by using combined ultrastructural and DNA evidence. The monophyly of this taxon can now he considered as beyond doubt.…”

Section: Neodermatasupporting

confidence: 93%

The interrelationships of all major groups of Platyhelminthes: phylogenetic evidence from morphology and molecules

Littlewood

Rohde

Clough

1999

Biological Journal of the Linnean Society

730

163

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We used a data matrix of 65 morphological characters from 25 ingroup and 6 outgroup taxa, and an alignmcnt comprising complete 18s rDNA scqucnccs from 82 species of parasitic and free-living Platylielminthcs and from 19 species of loivcr invcrtchratcs to analyse phylogenctic relationships ofvarious platyhclminth taxa. Of the 1358 unambiguously aligiiablc molecular positions, 995 wcrc variable and 757 \vcrc phylogcnetically informative (parsimony criterion); complete 18s rDNA sequences ranged in length from 1755 to 2873 lip. Main conclusions arc: Ncodermata are monophyletic, and the Trematoda, hlonogcnca and Cestoda within thcm arc monophylctic as well. The sister group of thc Ncodcrmata is all the otlicr Ncoophora; the Kalyptorhynchia, 'I'yphloplanida, Dalyclliida and Tcmiiocephalida form one clade, and the last three another. Rlonophyly of the Seriata is rejected, but Polycladida/ Rfacrostomida/Haplopharyngida arc monophylctic, as arc the last two taxa. As a consequence, validity of the taxon Trepaxonemata is rejected. Further studies must show the corrcct position of the Acoela and Ncmcrtodermatida. It is strcsscd that morphological and molecular data in some respects lead to contradictory results, for instance concerning the position of the Fccampiidac/ 1 ~r a . r t o n i n / Z~i i t /~~o~h~~~ and the rclativc position of the Lccithoepitlicliata. Denser sampling of taxa for molecular data, complcmcntary scqucnccs from independent gcncs, and inclusion of additional morphological data arc necessary to resolve thcsc contradictions. 0 1:)w 'l'l1r l . i l l 1 l~~~~l Socict) 01 1.011d011

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Section: Neodermatasupporting

confidence: 93%

The interrelationships of all major groups of Platyhelminthes: phylogenetic evidence from morphology and molecules

Littlewood

Rohde

Clough

1999

Biological Journal of the Linnean Society

730

163

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“…A-E modified from Purschke & Mu¨ller (1996), G modified from Purschke (1990b). similar events observed in several platyhelminth species (Sopott-Ehlers, 1984. The functional significance of such ocelli is unknown and some hypotheses have been suggested by Bartolomaeus (1993).…”

Section: Unpigmented Ocellimentioning

confidence: 86%

Sense organs in polychaetes (Annelida)

Purschke

2005

Hydrobiologia

151

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Polychaetes possess a wide range of sensory structures. These form sense organs of several kinds, including the appendages of the head region (palps, antennae, tentacular cirri), the appendages of the trunk region and pygidium (parapodial and pygidial cirri), the nuchal organs, the dorsal organs, the lateral organs, the eyes, the photoreceptor-like sense organs, the statocysts, various kinds of pharyngeal papillae as well as structurally peculiar sensory organs of still unknown function and the apical organs of trochophore larvae. Moreover, isolated or clustered sensory cells not obviously associated with other cell types are distributed all over the body. Whereas nuchal organs are typical for polychaetes and are lacking only in a few species, all other kinds of sensory organs are restricted to certain groups of taxa or species. Some have only been described in single species till now. Sensory cells are generally bipolar sensory cells and their cell bodies are either located peripherally within the epidermis or within the central nervous system. These sensory cells are usually ciliated and different types can be disinguished. Structure, function and phylogenetic importance of the sensory structures observed in polychaetes so far are reviewed. For evaluation of the relationships of the higher taxa in Annelida palps, nuchal organs and pigmented ocelli appear to be of special importance.

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“…Two hypotheses have been proposed: (i) pigment has been lost in the stem species of the Proseriata and the character "pigmented mantle cell" reexpressed in the Unguiphora (Martens and Schockaert, 1988) and (ii) pigment has been lost at the base of the Lithophora, a synapomorphy for the taxon, and the Unguiphora thus have the plesiomorphic condition for the Rhabditophora (Ehlers and Sopott-Ehlers, 1990). It is noteworthy that some Monocelididae possess a shading device built up by an additional multicellular pigment shield, which is the result of secondary evolution (Sopott-Ehlers, 1984a, 1993b.…”

Section: Morphological and Karyological Character Definitions Used Tomentioning

confidence: 96%

The Interrelationships of Proseriata (Platyhelminthes: Seriata) Tested with Molecules and Morphology

Littlewood

Curini‐Galletti

Herniou

2000

Molecular Phylogenetics and Evolution

362

174

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Feinstruktur pigmentierter und unpigmentierter Photoreceptoren bei Proseriata (Plathelminthes)

Cited by 21 publications

References 24 publications

The interrelationships of all major groups of Platyhelminthes: phylogenetic evidence from morphology and molecules

The interrelationships of all major groups of Platyhelminthes: phylogenetic evidence from morphology and molecules

Sense organs in polychaetes (Annelida)

The Interrelationships of Proseriata (Platyhelminthes: Seriata) Tested with Molecules and Morphology

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