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Flatworms

  • 89 Members
  • 266 Sightings
  • 0 Posts

The flatworms, known as Platyhelminthes are a phylum of fascinating, simple bilaterian, unsegmented, soft-bodied invertebrate animals. Unlike other bilaterians, they have no body cavity, and no specialized circulatory and respiratory organs, which restricts them to having flattened shapes that allow oxygen and nutrients to pass through their bodies by diffusion. The digestive cavity has only one opening for both the ingestion and expulsions of undigested wastes) -this means that food cannot be processed continuously. Platyhelminthes are divided into Turbellaria, which are mostly nonparasitic animals such as planarians, and three entirely parasitic groups: Cestoda, Trematoda and Monogenea. Free-living flatworms are mostly predators, and live in water or in shaded, humid terrestrial environments such as leaf litter. We are fortunate to have as a member of BowerBird, Dr Leigh Winsor from the Jame Cook University at Townsville who is a free-living flatworm expert. Leigh is most keen for members to find and upload images of flatworms. He would also like from time to time for members to collected into alcohol flatworms they find which will be used in his DNA analysis of this difficult group of animals.

  • Reiner Richter described a sighting

    Sighting Small Mottled Flatworm (Reomkago wellingtoni)

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    Sighted 11 Jan 2018
    Reiner Richter 19 January 2018
    Tagged With reomkago wellingtoni
    Reiner Richter says

    Found under a log in damp forest. Seems to fit Reomkago wellingtoni as identified previously on BowerBird by Dr Leigh Winsor. Unfortunately we forgot to photograph the underside as previously suggested.

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  • Reiner Richter added a sighting

    Small Mottled Flatworm (Reomkago wellingtoni)

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    Sighted 11 Jan 2018
    Batts Creek Track, Reefton VIC 3799, Australia

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  • Dr Leigh Winsor described a sighting

    Sighting Black Flatworm

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    Sighted 25 Dec 2017
    Dr Leigh Winsor 31 December 2017
    Tagged With parakontikia sp. cf atrata
    Dr Leigh Winsor says

    Well done Reiner in getting a photo that shows the single row of large eyes towards the anterior end where they stand out against the greyish ground colour laterally. I am sure that this is a Parakontikia, probably P. atrata that is jet black dorsally without any dorsolateral markings, though in your photos the reflection of light is suggestive of a pale longitudinal stripe. Unfortunately the diagnostic ventral stripes cannot be seen - they comprise a median and marginal dark grey longitudinal stripes, separated by a narrow interval of light grey ground colour. The species was originally described from specimens collected in the Upper Manning River district in NSW. Subsequently I have found the species in Victoria (Lower Plenty, Templestowe, Romsey, and Mt Buffalo), and in Tasmania (Launceston). It has also recently been reported from the UK - another introduction there. Reiner has previously posted this species on BowerBird (http://www.bowerbird.org.au/observations/53828 15 Jan 2016 Big Waterhouse Lake Track, Waterhouse TAS 7262, Australia (shows ventral surface and is associated with Lenkunya munda), and http://www.bowerbird.org.au/observations/56198 15 Feb 2016 Wicks Reserve, The Basin VIC 3154, Australia RR) . The species is often encountered in urban gardens, and in rural areas is often found close to water courses together with the water-loving species Lenkunya munda.

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  • Dr Leigh Winsor identified a sighting

    Sighting Black Flatworm

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    Sighted 25 Dec 2017
    Dr Leigh Winsor 31 December 2017
    Rhabditophora
    (class)
    Taxonomy: Animalia: Platyhelminthes: Rhabditophora
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  • Reiner Richter added a sighting

    Black Flatworm

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    Sighted 25 Dec 2017
    424 Liverpool Rd, Kilsyth South VIC 3137, Australia

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  • Dr Leigh Winsor described a sighting

    Sighting Fletchamia sugdeni 2006

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    Sighted 26 Dec 2006
    Dr Leigh Winsor 23 December 2017
    Dr Leigh Winsor says

    I agree with Reiner that this is a specimen of F. sugdeni. It is well within its range. Interestingly the beginning of the yellow dorsal ground colour anteriorly appears as a pale yellow median dorsal stripe within the brownish pigment of the head, and seems to extend slightly along the back, though this could be an effect of lighting. This species is frequently encountered moving about by day, and there is reason to believe that the bright yellow colour is a warning to potential predators that the species is harmful.

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  • Dr Leigh Winsor described a sighting

    Sighting Flatworm: Reomkago wellingtoni?

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    Sighted 14 Dec 2017
    Dr Leigh Winsor 23 December 2017
    Tagged With reomkago wellingtoni
    Dr Leigh Winsor says

    Reiner's superb photos are of Reomkago wellingtoni. We have seen this species previously on BowerBird. It is found in the eastern highlands of Victoria, and also in Tasmania. A beautiful little species. The typical "portholing" of the eyes in which the individual eyes are surrounded by a pigment free zone along the side of the planarian, are just discernible. The species is close to Reomkago quadrangulata.

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  • Dr Leigh Winsor identified a sighting

    Sighting Flatworm: Reomkago wellingtoni?

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    Sighted 14 Dec 2017
    Dr Leigh Winsor 23 December 2017
    Rhabditophora
    (class)
    Taxonomy: Animalia: Platyhelminthes: Rhabditophora
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  • Dr Leigh Winsor described a sighting

    Sighting Rhabditophora flatworm - yellow with green stripes - thanks Leigh

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    Sighted 9 Dec 2017
    Dr Leigh Winsor 23 December 2017
    Tagged With caenoplana dubia
    Dr Leigh Winsor says

    Rog’s clear photos are of Caenoplana dubia. The specific name "'dubia'' means ''uncertain'', and was given to this species because it resembles two other similarly striped species, C. hoggii and C. sulphurea whose ranges overlap with C. dubia. However, on close examination C. dubia is quite different to these two species from which it is differentiated in that the paired inner lateral dark dorsal longitudinal stripes are in direct contact with the median paired greenish stripes. In the other two species, the outermost dark lateral stripes are separated from the paired greenish median stripes by an interval of yellow ground colour. Caenoplana dubia was first recorded near Narre Warren in South Gippsland, and I have also found it in the Gembrook area, and I have a record of the species at Bunyip, which is the most easterly record of the species to date. I am sure that this is the first BowerBird record of this species. The “slug” in the photo looks to me more like the larvae of some arthropod rather than a mollusc. A beautiful planarian and a nice record.

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  • Dr Leigh Winsor described a sighting

    Sighting Planarian specie

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    4 notes
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    Sighted 21 Mar 2010
    Dr Leigh Winsor 23 December 2017
    Tagged With australopacifica sp.
    Dr Leigh Winsor says

    In reviewing this species, I realized that I had not assigned it to a genus. For the present it is placed in the collective genus Australopacifica sp.. I do so reluctantly as collective genera become dumping grounds from which it is difficult to even roughly guess to which other genus the species could belong.

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