Appendix 6.3(22). Representative benthic invertebrates described for the 

 Fresh Marsh Habitat in coastal southeastern Louisiana (Thomas 1976) . 



Phylum: Annelida 



Class: Hirudinea (leeches) 

 Family: Hirudidae 



Macrobdella ditetra (Moore) 

 Family: Glossiphoniidae 

 Placobdella sp. 



Phylum: Mollusca 



Family: Ancylidae (limpets) 



Laevapex sp. 

 Family: Bythinidae (snails) 



Pomatopyrgus sp. 

 Family: Lymnaeidae (pond snails) 



Pseudosuccinea sp . 

 Family: Physidae (pouch snails) 



Physa sp. 

 Family: Planorbidae (orb snails) 



Heliosoma sp. 



Gyraulus sp. 

 Family: Viviparidae (large snails) 



Viviparus sp. 

 Family: Sphaeriidae (fingernail clams) 



Sphaerium sp. 

 Family: Unionidae (clams) 



Anodonta grand is (Soy") 



Anodonta imbecillus (Soy) 



Villosa lienosa 



Phylum: Arthropoda 

 Class: Crustacea 

 Family: Balanidae (barnacles) 



Balanus sp. 

 Order: Isopoda (aquatic sow bugs) 

 Family: Asellidae 



Asellus sp . 

 Order: Amphipoda (scuds, sideswinners) 

 Family: Amphithoidae 



Cymadusa compta (Smith) 

 Family: Gammaridae 



Crangonyx gracilis 



Gammarus f asciatus 

 Family: Talitridae 



Hyalella azteca ( Saussure) 

 Order: Decapoda 

 Family: Cambaridae 



Cambarellus shufeldtii (Faxon) (small crayfish) 



Orconectes lancifer (Hagen) (crawfish) 



Procambarus clarkii (Girard) (swamp crawfish) 



Phylum: Bryozoa (moss animalcules) 

 Family: Lophopodidae 



Pectinatella magnifica (Leidy) 



166 



