Sagittiferidae

































Sagittiferidae

Symsagittifera schultzei (from Graff, 1891).png

Symsagittifera schultzei

Scientific classification
Kingdom:
Animalia
Phylum:
Xenacoelomorpha
Class:
Acoela
Order:
not assigned
Family:
Sagittiferidae
Genera


  • Antrosagittifera


  • Convolutriloba[1]

  • Praesagittifera

  • Sagittifera

  • Symsagittifera



Sagittiferidae is a family of Acoela.




Contents






  • 1 Systematics


  • 2 Characteristics


  • 3 Species


    • 3.1 Antrosagittifera


    • 3.2 Convolutriloba


    • 3.3 Sagittifera


    • 3.4 Symsagittifera




  • 4 References





Systematics


The family is divided into five genera (see taxobox) and contains about 20 species (Turbellarian taxonomic database, 2006). The affinities of the genera are as yet unclear. Some biologists prefer to exclude the genus Praesagittifera, leaving into the family only the genera with sagittocysts.[2]



Characteristics


Sagittiferidae are small flat worm-like animals. Several of them grow symbiotic algae Tetraselmis in their body cavity and tissues.


Special characteristics include a ciliated or non-ciliated sac-like male antrum. Most members have sagittocysts on their skin.[3] Sagittocysts are needle like bodies 18-50 µm long that contain some secretory product. They can be extruded from the body by an associated muscle.[1] They are believed to play a role in defence and prey capture. Ultrastructurally, they have a vesicular core surrounded by a mesh of actin filaments.



Species



Antrosagittifera


Contains the following species:



  • Antrosagittifera corallina Hooge & Tyler, 2001


Convolutriloba


Main article: Convolutriloba

Contains the following species:




  • Convolutriloba hastifera Winsor 1990


  • Convolutriloba longifissura Bartolomaeus & Balzer, 1997


  • Convolutriloba macropyga Shannon & Achatz, 2007


  • Convolutriloba retrogemma Hendelberg & Akesson 1988



Sagittifera


Contains the following species:



  • Sagittifera sagittifera (Ivanov, 1952)


Symsagittifera


Contains the following species:




  • Symsagittifera bifoveolata (Mamkaev, 1971)


  • Symsagittifera corsicae Gschwentner, Baric & Rieger, 2002


  • Symsagittifera japonica (Kato, 1951)


  • Symsagittifera macnaei (Marcus, 1957)


  • Symsagittifera nitidae (Yamasu, 1982)


  • Symsagittifera poenicea Kozloff 1998


  • Symsagittifera psammophila (Beklemischev, 1957)


  • Symsagittifera roscoffensis (Graff, 1891)


  • Symsagittifera schultzei (Schmidt, 1852)


  • Symsagittifera smaragdina Achatz, Gschwentner & Rieger, 2005



References




  1. ^ ab Gschwentner, Robert; Ladurner, Peter; Salvenmoser, Willi; Rieger, Reinhard; Tyler, Seth (1999), "Fine Structure and Evolutionary Significance of Sagittocysts of Convolutriloba longifissura (Acoela, Platyhelminthes)", Invertebrate Biology, American Microscopical Society, 118 (4): 332, doi:10.2307/3227005, JSTOR 3227005.mw-parser-output cite.citation{font-style:inherit}.mw-parser-output .citation q{quotes:"""""""'""'"}.mw-parser-output .citation .cs1-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .citation .cs1-lock-limited a,.mw-parser-output .citation .cs1-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .citation .cs1-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration{color:#555}.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration span{border-bottom:1px dotted;cursor:help}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Wikisource-logo.svg/12px-Wikisource-logo.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output code.cs1-code{color:inherit;background:inherit;border:inherit;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;font-size:100%}.mw-parser-output .cs1-visible-error{font-size:100%}.mw-parser-output .cs1-maint{display:none;color:#33aa33;margin-left:0.3em}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-right{padding-right:0.2em}


  2. ^ Achaz,J.G, Gschwentner,R, Rieger,R, "Symsagittifera smaragdina sp. nov.: A new acoel (Acoela: Acoelomorpha) from the Mediterranean Sea", Zootaxa 1085: 33-45, 2005


  3. ^ Kostenko,A.G, Mamkaev,Y.V. "The position of "green convoluts" in the system of acoel turbellarians (Turbellaria, Acoela). 1. Simsagittifera gen. n. 2. Sagittiferidae fam. n", Zool Zh 69(6):11-21,1990


  • Turbellarian taxonomic database online







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