468 PROCEEDINGS HELMINTHOLOGICAL SOCIETY VOL. 2, NO. 1 



Ovaries 2 (for alternative see preceding page) 

 Gonads 9 outstretched; spinneret present; marine 



Amphid "folded" or crook-shaped; pharynx conoid; striae plain (Axonolaimus de Man 1889) 



Amphid multispire; striae of dots, altered on lateral fields 



Spicula 2-jointed ; nema 2% wide Dorylaimopsis Ditlev. 1918 



( = Xinema Cobb 1920) 



Spicula entire; nema 4% wide Mesonchium Cobb 1920 



( = Pepsonema Cobb 1920) 

 Gonads 9 reflexed; spinneret present 



Amphid large, multispire; striae resolvable into elements; often nemativorous 

 Pharynx 2 chambers; mid-pharynx denticulate, apophyses forward & backward; striae of dots 

 Circular muscles about anterior pharynx; phar. small; denticles irregular. . Cobbionema Fil. 1922 

 Circular muscles none; pharynx capacious; denticles regularly placed H alichoanolaimus de Man 1886 



( = Smalsundia Allgen 1929) 



Pharynx not of 2 chambers; denticles absent (Demonema ?) 

 Mandibles none 

 Dots of striae not larger laterally; jaws with many horny teeth anteriorly. . ..Demonema Cobb 1894 



Dots of striae larger laterally; onchia equal, apices axial Mesonchium Cobb 1920 



( = Pepsonema Cobb 1920) 

 Mandibles 2 or 3; Selachineminae 



Dorsal mandible a mere rod, developed mandibles 2 Selachinema Cobb 1915 



Dorsal mandible developed, making 3, split; subordinate hooks pres. ; cutic. pores pres. 

 Central mandibular prong 1, no. hooks odd ; striae of dots ; c? supplements 2 Synonchium Cobb 1920 

 Central mand. prongs 2,no. hooks even;stri.dots, dashesic? supplements 20 Synonchiella Cobb 1933 

 Amphid small, opening circular, obscure; lips 3, large; Enoplinae 



Lips not conoid, nor high as broad; labial papillae seldom setose; jaws 2-pointed. .Enoplus Duj. 1845 



( = Enoplostoma Marion 1870) 

 Lips large, conoid, often as high as broad; labial papillae 6, setose 



Mandibles 2-clawed; lips radially striate; spicula long, striate Enoploidex Saveljev 1912 



Mandibles absent; lips not striate 

 Basal onchia large, reaching lips % 



Framework of jaws absent Sai-eljevia Fil. 1927 



Framework of jaws present Filipjeria Kreis 1928 



Basal onchia absent; "jaws" 3. without hooks 



Jaw framework bearing 3 equal mid-pharyngeal teeth Enoplolaimus de Man 1893 



Jaw framework without teeth Parenopius Fil. 1927 



^The teeth iunequal in size, usually not mobile radially; amph., in Enoplidae, oft obscure (from pg. 467) 

 Female not known 



Cephalic setae 0; spiculum 1, gubernaculum absent Dioncholaimus Kreis 1932 



Cephalic setae pres.; spicula 2, gubernac. pres. (Hyptiolaimus, Cacolaimus, Convexolaimus, J only) 

 Amphid multispire, head width; striae of dots, wings 2; labial "palps" 12, jointed Pomponema Cobb 1917 

 Amphid circular, elliptical or monospiral 



Pharynx with denticles, or many subordinate onchia ; labial pa pill. 6, setose; amph. round or oval 

 Labial"palps"12, tips large; onch. dorsal, denticles not basal; wingscalariform Anaionchium Cobb 1920 



Labial "palps" 0; base of pharynx filled with subordinate onchia Polydontus Schulz 1932 



Pharynx without denticles or numerous subordinate onchia 



Bulb around pharynx set off by sudden constriction Hyptiolaimus Cobb 1930 



Bulb around pharynx none or not set off by constriction 



Striae coarse; onchia 2, lateral or subventral; labial papillae 4 DiodonMaim us Southern 1914 



Striae none or very fine; onchia 3 



Lips 4, 2 of them bearing papillae; cephalic setae 4; cf supplements tubular . .Dayda Southern 1914 

 Lips 6, papillae 6, setose; cephalic setae 10, short; J 



Head set off by thicker cuticle; wall of pharynx thin Cacolaim us Kreis 1932 



Head not set off, its cuticle thin; wall of pharynx distinct Conrexolaimus Kreis 1928 



Female known 

 Ovary 1 , anterior (Pseudoncholaimus ?) 



Median onchium spear-like, dorsal onchium minute, basal Enoplocheilus Kreis 1932 



Median spear-like onchium absent 



Gonad 9 outstretched; amphid circular or monospiral 



Onchia 2, like vertical plates, subventral; amphid monospire. longer than wide. .Gonimichus Cobb 1920 

 Onchia not plate-like, basal, outlets of oesoph. glands; amph. round; tail isetaceous Cobbia de Man 1907 

 Gonad 9 reflexed 



Spinneret absent; phasmids present 



Cardiac bulb iglandular, not valvate; median swelling often present (Odonto pharynx de Man 1912) 

 Card, bulb valvate, oes. cephaloboid; vagina directed forward, muscles heavy Turbatrix Peters 1927 



( = Anguillula auctores) 



~ Spinneret present; phasmids absent; amphid with internal pocket, usually small 

 Cephalic setae 0; papillae in 2 circlets; in soil and fresh water 



Pharynx large, open, d= parallel-sided; spinneret terminal Mononchus Bast. 1865 



Pharynx narrow, iconoid; spinneret ventrad Mononchulus Cobb 1918 



: Cephalic setae present; papillae 1 circlet; marine or in brackish waters; Oncholaiminae 

 Demanian system absent 



Ovary posterior; vulva 73-77%; gubernaculum none Pseudoncholaimus Kreis 1932 



Ovary ant.; vulva 70-75%; gubernaculum pres.; spicula rttail length. . Prooncholaimus Micol. 1924 

 Demanian system present 



Uvette and exit pores present Metoncholaimus Fil. 1918 



Uvette ampulla-like, exit pores absent 



Male with pre-anal appendicule Oncholaimium Cobb 1930 



Male without pre-anal appendicule Oncholaimus Duj. 1845 



Ovaries 2 



Gonads 9 outstretched; striae of rods.exc. laterally; amph. a slit. . . .Dicriconema Steiner & Hoeppli 1926 

 Gonads 9 reflexed 



Habitat soil and fresh water (for alternative see next page) 



Spinneret 0; anterior oesoph. (corpus) with or without non-valvate med. bulb ; amph. round or oval 

 "Spear" none; dorsal onch. opposed by ventral tooth or ridge; ceph. set. 6-10 . . .Butlerius Goodey 1929 



