Hirudinea


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Related to Hirudinea: Nematoda

Hir·u·din·e·a

(hir'ū-din'ē-ă),
The leeches, a class of worms (phylum Annelida) with flat, segmented bodies, a sucker at the posterior end, and often a smaller sucker at the anterior end; they are predatory on invertebrate tissues, or feed on blood and tissue exudates of vertebrates.
[L. hirudo, leech]

Hirudinea

Parasitology A class of segmented annelids–ie, leeches, the most well-known of which is Hirudo medicinalis, that evolved from earthworms and are found in fresh water and soil in the subtropics and tropics Genera Haemadipsa, medicinal leech, Dinobdella, Haementeria, Helobdella, Hirudinaria, Hëmopis, Limnatis, Macrobdella, Poecilobdella, Pontobdella; the leech is flat, has 2 suckers, the cranial sucker houses a mouth–the impression left by a leech bite has been fancifully likened to the Mercedes-Benz insignia; the caudal sucker is involved in crawling

Hir·u·din·e·a

(hir'ū-din'ē-ă)
The leeches, a class of worms in the phylum Annelida with flat, segmented bodies, a sucker at the posterior end, and often a smaller sucker at the anterior end; they are predatory on invertebrate tissues, or feed on blood and tissue exudates of vertebrates. The class includes parasitic forms.
[L. hirudo, leech]

Hirudinea

a class of the phylum Annelida that includes the leeches, those worms which lack chaetae or parapodia, have an apparent external segmentation much greater than the small number of internal segments and possess suckers for attachment. Most species feed on blood.
References in periodicals archive ?
Collection of parasitic and nonparasitic leeches (Hirudinea, Clitellata) from 12 geographical sampling sites (Figure 1) was performed during the two-year seasons in Lake Gusinoe and its catchment area.
SISTEMAS DE MANEJO TAXA Labranza Labranza Suelo Pradera de Tradicional Minima Desnudo kikuyo Acarina 33 0 0,6 5 Aranae 9 5 0,6 5 Coleoptera 29 59 29 32 Collembola 16 2 3 12 Dermaptera 1 0 0,5 1 Diptera 3 5 3,3 9 Haplotaxida 3 2 37 27 Hirudinea 0 2 5 1 Lithobiomorpha 4 2 4 3 Polydesmida 2 25 17 5 Total (%) 100 100 100 100 Tabla 3.
Grupos taxonomicos Abundancia em 0,1 [m.sup.2] Rio Gravatai Canal de Irrigacao Nematoda -- 4,24 (2,9) (1) Trematoda -- -- Rotifera -- -- Annelida Oligochaeta 36,78 (19,3) 205,83 (46,2) Hirudinea 2,12 (1,5) 0,71 (0,7) Mollusca Bivalve Sphaeriida -- -- Gastropoda Hydrobiidae -- -- Planorbidae Biomphalaria sp.
** Naididae Nais ** Hirudinea 1 ** (clase) Total de familias reportadas 8 31 31 18 GREMIO TROFICO FAMILIA Dytiscidae Por lo general Hydrophillidae las larvas son depredadoras o Elmidae microfagas y los adultos vegetarianos (fitofagos).
Population dynamics of Piscicola geometra (Hirudinea: Rhynchobdellida) on Oreochromis niloticus (Cichlidae) cultured in a rainforest fish pond, southeastern Nigeria.
Prey Habitat % FO % Total weight Osteichthyes B,I 79.4 86 Invertebrates 67.2 8.8 Molluska I, B 1.6 7.2 Chaetognatha P 3.1 <0.1 Nematoda (free-living) B 3.1 <0.1 (unspecified) I 1.5 <0.1 Nemertea B 4.6 <0.1 Trematoda I 7.6 <0.1 Polychaeta B 3.8 <0.1 Hirudinea I 0.8 <0.1 Crustacea B, P 17.6 0.3 Other I 58 5.2
Representatives of some other freshwater Insecta and Mollusca, as well as Hirudinea, Mermithidae, Hydracarina, Gammarus, and Bryozoa were observed seldom and as single individuals.
* * * * * D Turbellaria * * * * * D Nematoda * ** ** *** ** D Hirudinea * * * * * D Oligochaeta Naidinae Pristina leidyi * *** *** *** ** C-R Pristina menoni * * * * * C-R Pristina aequiseta * * * * * C-R Pristina macrochaeta * * * * * C-R Pristina biserrata * * * * * C-R Pristina jenkinae * * * * * C-R Pristina americana * * ** * * C-R Chaetogaster diaphanus * * * * * D Dero (Dero) * * ** ** * C-R multibranchiata Dero (Dero) sawayai * ** * ** * C-R Dero (Dero) nivea * * * * * C-R Dero (Dero) obtusa * * * * * C-R Dero (Dero) botrytis * * * * * C-R Dero sp.
It has also been demonstrated that mature spermatozoon, significantly differs in its ultrastructure, from others clitellate spermatozoa (Branchiobdellida y Hirudinea) and even more from Polychaetes.
0.2 0.2 October 7 Chironomidae 85.7 15.5 5.8 8.7 4.7 Zygoptera 85.7 8.7 4.6 5.7 3.8 Anisoptera 28.6 0.3 0.2 3.7 3.6 Trichoptera 28.6 0.1 0.07 0.1 0.07 Ephemeroptera 28.6 0.3 0.2 0.1 0.06 Hirudinea 14.3 0.04 0.04 0.2 0.2 Mollusca 28.6 2.5 2.4 0.4 0.3 Amphipoda 71.4 52.2 14.0 52.6 15.6 Cladocera 28.6 3.0 2.9 0.3 0.29 Fish 14.3 14.3 14.3 14.3 14.3 UIR 28.6 3.1 2.4 13.8 13.7 Plant material 42.9 .