;Chaetarthriini;Anacaenini Character;Chaetarthria;Guyanobius;Crenitis;Crenitulus;Pseudorygmodus "Nasale, symmetry";symmetrical;symmetrical;asymmetrical;asymmetrical;asymmetrical "Nasale, teeth";"3 teeth, middle one much longer";"5 teeth";"5 teeth";"5 teeth";"5 teeth, lateral ones grouped" "Epistomal lobes with inner spines";present;present;absent;absent;absent "Frontal lines";"subparallel, widely separated basally";"lyriform, converging towards base of head capsule";"lyriform, converging towards base of head capsule";"lyriform, converging towards base of head capsule";"lyriform, converging towards base of head capsule" Stemmata;"closely aggregated, difficult to count";"6 distinctly separated";"6 distinctly separated";"6 distinctly separated";"6 distinctly separated" "Antennal sculpture";"A1 and A2 smooth";"A1 and A2 with sharp cuticular spines";"A1 and A2 with sharp cuticular spines";"A1 and A2 with sharp cuticular spines";"A1 and A2 smooth" Antenna;"A1 not wider than A2, A3 as long as wide";"A1 distinctly wider than A2, A3 longer than wide";"A1 distinctly wider than A2, A3 longer than wide";"A1 distinctly wider than A2, A3 longer than wide";"A1 slightly wider than A2, A3 longer than wide" Mandible;"with 2 retinacula";"with 3 retinacula";"with 3 retinacula";"with 3 retinacula";"with 2 retinacula" Stipes;"without spine";"with a stout apical spine on inner margin";"without spine";"without spine";"without spine" "Maxillary palpomere 1";smooth;"with sharp dorsal and mesal cuticular spines";"with sharp dorsal and mesal cuticular spines";"with sharp dorsal and mesal cuticular spines";"with sharp dorsal and mesal cuticular spines" "Maxillary palpomere 1";"incompletely sclerotized";"incompletely sclerotized";"completely sclerotized";"incompletely sclerotized";"incompletely sclerotized" Mentum;"as wide as prementum";"much wider than prementum";"much wider than prementum";"much wider than prementum";"much wider than prementum" Prementum;"incompletely sclerotized dorsally";"completely sclerotized";"completely sclerotized";"completely sclerotized";"completely sclerotized" Ligula;"round, as long as labial palpi";"elongate, subtriangular, longer than labial palpi";"elongate, subtriangular, longer than labial palpi";"elongate, subtriangular, longer than labial palpi";"elongate, subtriangular, longer than labial palpi" "Pronotal plate";"without lateral projections";"without lateral projections";"with lateral projections";"with lateral projections";"with lateral projections" Legs;"reduced, 3-segmented";"normal, 5-segmented";"normal, 5-segmented";"normal, 5-segmented";"normal, 5-segmented" "Thoracic and abdominal pleura";"slightly lobed";"strongly lobed";"strongly lobed";"slightly lobed";"strongly lobed" "Abdominal tergum VIII";divided;entire;entire;entire;entire "Posterior margin of tergum VIII";"not trifurcated";"not trifurcated";trifurcated;trifurcated;trifurcated "Head capsule, latero-ventrally with many secondary setae";absent;absent;present;present;absent gFR1;"with 6 setae";"with 8 setae";"with 6 setae";"with 6 setae";"with 8 setae" gFR2;"3–4 simple setae";"4 bifid apically setae";"4 simple setae";"4 simple setae";"3 simple setae" "Secondary setae along frontal lines";"at most 5 setae";"at least 8 stout setae";"3–4 setae";"1 seta";"no secondary setae" "Setae FR4-6";"arranged in a triangle";"arranged in a straight line";"arranged in a straight line";"arranged in a triangle";"arranged in a triangle" "Seta FR12 position";"posterior to FR13";"posterior to FR13";"anterior to FR13";"anterior to FR13";"anterior to FR13" "Pore PA6 position";"distant from frontal lines";"distant from frontal lines";"close to frontal lines";"close to frontal lines";"close to frontal lines" "Setae MX8-11";"apex simple";"bifid apically";"apex simple";"apex simple";"apex simple" "Seta MX21 position";"closer to inner edge of palpomere";"closer to inner edge of palpomere";"closer to inner edge of palpomere";"closer to outer edge of palpomere";"closer to outer edge of palpomere" "Seta LA3";"very long, slender";"short, stout";"short, slender";"long, slender";? "Pore LA8 position";distal;"at midlength";distal;distal;distal "Seta LA10 position";"on intersegmental membrane";"at base of ligula";"on intersegmental membrane";"on intersegmental membrane";? "Pore LA11 position on ligula";"at midlength";basal;"at midlength";"at midlength";?