Acanthocephala


Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.

Acanthocephala

 [ah-kan″tho-sef´ah-lah]
a phylum of elongate, mostly cylindrical organisms (thorny headed worms) parasitic in the intestines of all classes of vertebrates.

A·can·tho·ceph·a·la

(ă-kan'thō-sef'ă-lă),
The thorny-headed worms, a phylum (formerly considered a class) of obligatory parasites without an alimentary canal, characterized by an anterior introvertible spiny proboscis. They superficially resemble nematodes but are cestodelike in other traits, and hence are grouped as a distinctive phylum of helminths. In the adult stage they are parasites of vertebrate animals, mostly fish and amphibians; the larval stage is passed in invertebrates, chiefly crustaceans and insects.
[acantho- + G. kephalē, head]

Acanthocephala

/Acan·tho·ceph·a·la/ (ah-kan″tho-sef´ah-lah) a phylum of elongate, mostly cylindrical organisms (thorny-headed worms) parasitic in the intestines of all classes of vertebrates; in some classifications, considered to be a class of the phylum Nemathelminthes.

Acanthocephala

a phylum of elongate, mostly cylindrical organisms (thorny-headed worms) parasitic in the intestines of all classes of vertebrates.
References in periodicals archive ?
A number of Acanthocephala has been reported from the House Crow from Pakistan (Khan and Bilqees 1998 Khan et al.
sucetta Intestine Valid macrorchis Christensen & Calentine, 1983 Proteocephalus Amphiuma Intestine Valid Alternans Riser, 1942 tridactylum Acanthocephala Neoechinorhynchus Ictiobus Intestine Valid strigosus Van, bubalus Cleave 1949
Acanthocephala Specimens undetermined * Table 2 Prevalence (P) and Mean Abudance (MA) [+ or -] the standard deviation of the parasites collected from six species of sigmodontines rodents from the wetlands of the Rio de la Plata, Buenos Aires.
Only one species of Acanthocephala was observed, the Acanthocepahlus sp.
X 8 letters: ARAUCANA, EYEPIECE, SYSTASIS 9 letters: ATHABASKA, CONCYCLIC EBENACEAE, GONGAGENG, HACHSHISH, OGBOMOSHO, SUSPENSES 10 letters: ANATHEMATA, EVERYWHERE, SYSTEMISES 11 letters: ANAMNIONATA, ELEAGNACEAE, HEATHTHRUSH, KNICKAKNOCK, YMAGYNYNGLY 12 letters: ACCIACCATURA (cham), EVIDENCEABLE, LIGULIFLORAL (cham), REVERBERATOR, SYSTEMATISES 13 letters: EXPERGISCENCE, PIMPERLIMPIMP, READER-PRINTER, WINDOWSWALLOW 14 letters: ACANTHOCEPHALA, ELECTROPHORESE, THROSTLE-THROAT 15 letters: SERORESISTANCES 16 letters: ABRACHIOCEPHALIA (sted), SINISTROTORSIONS (sted) 17 letters: TRANSIT-INSTRUMENT 18 letters: EMPLOYMENT-EXCHANGE (b) Pattern X ?
Predators of scuds include fish, birds, aquatic insects, and amphibians, and parasites include tapeworms, flukes, roundworms, and Acanthocephala.
The ability to alter intermediate host behavior is widespread in the phylum Acanthocephala (Moore 1984), where the alterations usually involve responses to specific environmental stimuli rather than generalized host debilitation (Holmes and Bethel 1972).
Human parasites are classified in five major subdivisions: 1) Protozoa (ameba, flagellates, ciliates, sporozoans, and coccidia); 2) Platyhelminthes or flatworms (cestodes and trematodes); 3) Acanthocephala or thorny-headed worms; 4) Nematoda or round worms; and 5) Arthropoda (insects, spiders, mites, and ticks).
According to Taraschewski (2000), representatives of the Phylum Acanthocephala do not present intestinal tract and this characteristic led them to develop a highly specialized syncytial epidermis for nutrients absorption.
2 and 5 Other Metazoa Phyla Other Eukaryote Phyla Chaetognatha Ciliophora Ctenophora Other Alvelata Entoprocta Amoebozoa Hemichordata Cryptophyta Loricifera Loukozoa Gnathifera Glaucophyta Onochophora Choanozoa Porifera Picozoa Rotifera Foraminifera Xenoturbeiidea Rhodophyta Acanthocephala Myzozoa Chordata Apusozoa Cycliophora Heliozoa Gnathostomulida Percolozoa Kinohycha Euglenozoa Mesozoa Haptophyta Nematomorpha Metamunada Placozoa Cercozoa Priapulida Radiozoa Sipuncula Uncultured unicellular Uncultured Metazoa Eukaryote