Body has more than two cell layers, tissues and organs.Bilaterally symmetrical, and vermiform.Nematomorphan Species Count:- There are currently 361 species of Nematomorpha known to science (COL), however scientists think there may be many more species as yet unrecognized. (2009) Marine Ecology Progress Series 389: 139-147 ĭata on spatial variation of infections in 36 bivalve-trematode and 49 crustacean-trematode species pairs, from Thieltges et al.Nematomorpha Etymology: From the Greek Nema for Thread, and Morphe for shape or form. (2011) Oikos 120: 740-747 ĭata on taxonomic resolution in 950 surveys of helminth communities in 650 species of vertebrate hosts, from Poulin and Leung (2010) Parasitology 137: 1967-1973 ĭata on species richness of cestodes in 326 species of elasmobranchs, from Randhawa and Poulin (2010) Ecography 33: 866-877 ĭata on 106 experimental metacercarial infections, from Poulin (2010) Parasitology 137: 889-898 ĭata on 145 experimental cercarial infections, from Poulin (2010) International Journal for Parasitology 40: 371-377 ĭata on the body sizes of 571 species of cestodes parasitic in elasmobranchs, from Randhawa and Poulin (2009) Oecologia 161: 759-769 ĭata on trematode infections in 290 crustacean samples, from Thieltges et al. (2012) Evolutionary Ecology 26: 1497-1512 ĭata on parasite species richness and host body size in host species from 6 taxonomic groups, from Poulin et al. (2015) PNAS 112: 1791-1796 ĭata on aggregation levels of helminths in 410 samples of fish hosts, from Poulin (2013) Parasitology 140: 541-546 ĭata on morphometrics of transmission stages from 404 trematode species, from Koehler et al.
Data on the geographic coordinates where 4943 helminth species have been discovered, from Poulin and Jorge (2019) Parasitology 146: 168-175 ĭata on densities of 310 populations of parasitic metazoans and those of their hosts in lake ecosystems, from Lagrue and Poulin (2015) Oikos 124: 1639-1647 ĭata on body masses and densities of free-living and parasitic metazoans from lake ecosystems, from Lagrue et al.
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