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Species Aporrectodea trapezoides (Dugès, 1828)

Southern Worm (reference: http://www.sarep.ucdavis.edu/worms/profile3.htm (University of California Sustainable Agriculture Research & Education Program))

 

Generic Combinations

 

Miscellaneous Literature Names

 

Ecological Descriptors

Adult: soil dweller.

Extra Ecological Information

Found in heavy or sandy soil.

 

Diagnosis

External characters: Length 60-220 mm, clitellum width 3-7 mm, segment number 130-169. Prostomium epilobous. Tail flat or trapezoid. Setae lumbricine. First dorsal pore 6/7-13/14. Clitellum 26,27,28-34,35, saddle-shaped. Spermathecal pores two pairs in 9/10/11, near seta c lines. Female pores paired in 14, lateral to seta b, small slits. Male pores paired in 15, large slits. Tubercula pubertatis in 30,31-33,34, smooth, uninterrupted, occupying bc. Genital tumescences around ab in 9-11, and in 28, 30, 32-34. Live specimens dark gray or grayish brown.

Internal characters: Septa present from 5/6, 6/7-9/10 gradually thickened. Gizzard in 17. Calciferous glands in 11. Intestine from 20. Typhlosale present from 21. Hearts in 6,7-11. Spermathecae two pairs in 10 and 11, round, small. Nephridia holoic. Ovaries in 13. Testes two pairs in 10 and 11. Seminal vesicles in 9-12, small. Prostate glands absent.

 

Diagnosis References

Chang, C.-H., Shen, H.-P. & Chen, J.-H. BiotaTaiwanica: Aporrectodea caliginosa (Savigny, 1826). Version 2010. http://clitellates.biota.biodiv.tw/pages/584 [BiotaTaiwanica is a TaiBIF project funded by National Science Council] (URL accessed 28/1/2012)

 

Systematics

The name A. trapezoides has long been considered either a junior synonym of A. caliginosa or a distinct species by different authors (e.g. Blakemore 2002; Csuzdi & Zicsi 2003 for recent examples). Recent phylogenetic analyses, based on DNA sequences, suggest it is a distinct species (Perez-Losada et al. 2009)

 

History of changes

Note that this list may be incomplete for dates prior to September 2013.
Published As part of group Action Date Action Type Compiler(s)
17-Oct-2023 OLIGOCHAETA 06-Jul-2016 MODIFIED Dr Robin Wilson
17-Oct-2023 OLIGOCHAETA 06-Jul-2016 MODIFIED Dr Robin Wilson
17-Oct-2023 OLIGOCHAETA 27-Nov-2013 MODIFIED Dr Robin Wilson
OLIGOCHAETA 11-Dec-2011 ADDED Dr Robin Wilson