Kenkiidae

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Kenkiidae
Sphalloplana mohri.jpg
Sphalloplana (Sphalloplana) mohri
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Platyhelminthes
Order: Tricladida
Superfamily: Planarioidea
Family: Kenkiidae
Hyman, 1937
Genera [1]

Kenkiidae is a family of freshwater triclads. Their species can be found sporadically in caves, groundwater, and deep lakes in Central Asia, Far East and North America. [2] [3]

Contents

Description

Species in the family Kenkiidae are characterized by a thickened marginal epidermis, i.e., the epidermis of the body margins have larger cells provided with bigger rhabdites than the epidermis of the rest of the body. [4] Kenkiidae species have the testicles situated anterior to the pharynx, feature also common in the Dugesiidae and Planariidae. They have an anterior adhesive organ, which is also found in the family Dendrocoelidae. The inner muscles of the pharynx are divided in two layers. Kenkiidae species are not pigmented and they are usually blind. [2]

Phylogeny

Kenkiidae is the sister group of the family Dendrocoelidae. Both families have an apomorphic anterior adhesive organ. [4] [5]

Phylogenetic supertree after Sluys et al., 2009: [5]

Tricladida

Related Research Articles

<span class="mw-page-title-main">Planarian</span> Flatworms of the Turbellaria class

Planarians (triclads) are free-living flatworms of the class Turbellaria, order Tricladida, which includes hundreds of species, found in freshwater, marine, and terrestrial habitats. Planarians are characterized by a three-branched intestine, including a single anterior and two posterior branches. Their body is populated by adult stem cells called neoblasts, which planarians use for regenerating missing body parts. Many species are able to regenerate any missing organ, which has made planarians a popular model in research of regeneration and stem cell biology. The genome sequences of several species are available, as are tools for molecular biology analysis.

<i>Dugesia</i> Genus of flatworms

Dugesia is a genus of dugesiid triclads that contains some common representatives of the class Turbellaria. These common flatworms are found in freshwater habitats of Africa, Eurasia, and Australia. Dugesia is best known to non-specialists because of its regeneration capacities.

<span class="mw-page-title-main">Planariidae</span> Family of flatworms

Planariidae is a family of freshwater planarians.

<span class="mw-page-title-main">Geoplanidae</span> Family of flatworms

Geoplanidae is a family of flatworms known commonly as land planarians or land flatworms.

<span class="mw-page-title-main">Continenticola</span> Clade of flatworms

Continenticola is a clade that includes the land planarians (Geoplanidae) and the freshwater triclads.

<span class="mw-page-title-main">Dugesiidae</span> Family of flatworms

Dugesiidae is a family of freshwater planarians distributed worldwide. The type genus is Dugesia Girard, 1850.

<i>Girardia</i> Genus of flatworms

Girardia is a genus of freshwater planarians belonging to the family Dugesiidae.

<span class="mw-page-title-main">Dendrocoelidae</span> Family of flatworms

Dendrocoelidae is a family of freshwater tricladida flatworms that has a holarctic distribution.

<span class="mw-page-title-main">Maricola</span> Suborder of flatworms

Maricola is a suborder of triclad flatworms including species that mainly inhabit salt water environments. However, some species are also known from freshwater or brackish waters.

<span class="mw-page-title-main">Planarioidea</span> Superfamily of flatworms

Planarioidea is a superfamily of freshwater triclads that comprises the families Dendrocoelidae, Kenkiidae and Planariidae.

<span class="mw-page-title-main">Geoplanoidea</span> Superfamily of flatworms

Geoplanoidea is a superfamily of freshwater and land triclads that comprises the species of the Geoplanidae and the Dugesiidae families.

Cura is a genus of freshwater flatworm (triclads) belonging to the family Dugesiidae.

<span class="mw-page-title-main">Dimarcusidae</span> Family of flatworms

Dimarcusidae is a family of triclads found mostly in freshwater habitats of caves, although at least one species, Rhodax evelinae, occurs in surface waters. Currently the family contains only seven species distributed in five genera, although the total number of species is thought to be much higher.

<span class="mw-page-title-main">Microplaninae</span> Subfamily of flatworms

Microplaninae is a subfamily of land planarians.

Neppia is a genus of dugesiid triclad that is found in South America, Subantarctic region, Africa, Tasmania and New Zealand.

<i>Bdellocephala</i> Genus of flatworms

Bdellocephala is a genus of freshwater triclad that inhabits different regions of Eurasia.

<span class="mw-page-title-main">Geoplaninae</span> Subfamily of flatworms

Geoplaninae is a subfamily of land planarians endemic to the Neotropical region. Members of this family are sometimes referred to as the Neotropical land planarians. However, one species, Obama nungara has been introduced in Europe.

<span class="mw-page-title-main">Reproductive system of planarians</span>

The reproductive system of planarians is broadly similar among different families, although the associated structures can vary in complexity.

<span class="mw-page-title-main">Rhynchodeminae</span> Subfamily of flatworms

Rhynchodeminae is a subfamily of land planarians with a worldwide distribution.

<span class="mw-page-title-main">Caenoplanini</span> Tribe of flatworms

Caenoplanini is a tribe of land planarians in the subfamily Rhynchodeminae mostly found throughout the Australasian and Oceanian realms.

References

    • Tyler S, Schilling S, Hooge M, and Bush LF (comp.) (2006-2012) Turbellarian taxonomic database. Version 1.7 Database Archived 2012-02-04 at the Wayback Machine
  1. 1 2 Ball, I. R.: A contribution to the phylogeny and biogeography of the freshwater triclads (Platyhelminthes: Turbellaria). Biology of the Turbellaria (Edited by: Riser NW and Morse MP). New York: McGraw-Hill New York 1974 , 339-401.
  2. Hyman, L. H. (1937). "Studies on the Morphology, Taxonomy, and Distribution of North American Triclad Turbellaria. VIII. Some Cave Planarians of the United States". Transactions of the American Microscopical Society. 56 (4): 457–477. doi:10.2307/3222667. JSTOR   3222667.
  3. 1 2 Sluys, R.; Kawakatsu, M. (2006). "Towards a phylogenetic classification of dendrocoelid freshwater planarians (Platyhelminthes): A morphological and eclectic approach". Journal of Zoological Systematics and Evolutionary Research. 44 (4): 274. doi:10.1111/j.1439-0469.2006.00371.x.
  4. 1 2 Sluys, R.; Kawakatsu, M.; Riutort, M.; Baguñà, J. (2009). "A new higher classification of planarian flatworms (Platyhelminthes, Tricladida)". Journal of Natural History. 43 (29–30): 1763–1777. doi:10.1080/00222930902741669.

Wikispecies-logo.svg Data related to Kenkiidae at Wikispecies