Hirudinea - an overview | ScienceDirect Topics
Introduction to Annelida and the Class Polychaeta. Piet F.M. Verdonschot, in Thorp and Covich's Freshwater Invertebrates (Fourth Edition), 2015. Hirudinea (Leeches) The Hirudinea, or true leeches, are highly specialized clitellates, separated from other annelid groups by the presence of an anterior circumoral sucker and a posterior ventral sucker.
Hirudinea - Montana Entomology Collection (MTEC) | Montana …
Annelid. Hirudinea. Aquatic Invertebrates of Montana. Hirudinea. Introduction. Leeches. About 500 species (63 in North America) of primary freshwater annelids, some species are secondarily marine or terrestrial. Recognition. The form is usuallly distinctive. Leeches lack …
(PDF) Systematics of the freshwater leech genus ... - ResearchGate
2014年11月4日 · In total, 435 specimens of the Southeast Asian freshwater leech species within the Hirudinidae family were collected from 17 locations of various types of aquatic habitats in northeastern...
ADW: Hirundinea: CLASSIFICATION
Superclass Gnathostomata jawed vertebrates. Gnathostomata: pictures (15163) Gnathostomata: specimens (6827) Gnathostomata: sounds (709) Euteleostomi bony vertebrates. Euteleostomi: pictures (15026) Euteleostomi: specimens (6826) Euteleostomi: sounds (709) Class Sarcopterygii lobe-finned fishes and terrestrial vertebrates.
The present state of the leech fauna (Annelida, Hirudinea) in the …
2016年6月7日 · Abstract. Hirudinea is a small and ecologically important group of aquatic organisms. However, up to date, the leech fauna of Kazakhstan is poorly studied. The presence of large under-collected areas, such as the Upper Irtysh basin, makes biodiversity studies concerning these invertebrates from Kazakhstan relevant.
Hirudinaria: Habitat, Locomotion and Development - Biology …
The body of Hirudinaria is soft, vermiform, elongated, bilaterally symmetrical and metamerically segmented. In a state of extension the body is dorsoventrally flattened and appears almost strap-shaped but in a state of contraction, the body becomes more or less cylindrical.
The type species of the class Hirudinea Lamarck 1818 (sangsue médicinale, i.e., the medicinal leech), is still accepted today and regarded as a valid species (Figure 2). However, Lamarck’s second taxon, “H. sanguisorba”, remains an enigma. …
Annelida (Clitellata): Oligochaeta, Branchiobdellida, Hirudinida, and ...
2010年1月1日 · I.. Introduction to Oligochaeta, Branchiobdellida, Hirudinida, and Acanthobdellida. Freshwater annelids (oligochaetes, branchiobdellidans, leeches, and acanthobdellids) can be found in both standing and flowing water and are often an …
The spermatozoa of Hirudinea with examples from three different …
2015年3月1日 · The spermatozoa of the hirudinean species examined are long, filiform cells containing, in sequence, the acrosome (formed by an anterior extension of the acrosome tube called the anterior acrosome, and an acrosome proper), the helicoidal nucleus, the single mitochondrion surrounded by a sheath of electron-dense material, the flagellum of the ...
Biodiversity and ecology of Hirudinea (Annelida) from the Natural ...
2009年11月1日 · H. triserialis shows the widest range of tolerance, H. hyalina shows positive relationships to conductivity; H. diploides shows a high correlation with dissolved oxygen, H. striata, H. lineata, and...