TABLE 2 in Larval chaetotaxy and morphometry of Megasternini: Cercyon (Paracercyon) Seidlitz, Cryptopleurum Mulsant and Pelosoma Mulsant (Coleoptera: Hydrophilidae)

TABLE 2. Comparative table of selected morphologic and chaetotaxic characters among known Megasternini larvae. Megasternum is not included since the original larval description does not include chaetotaxic characters (Quennedey, 1965).
CharacterArmostusCercyonMegasternini Cryptopleurum MotonerusOosternumPelosomaStemmataarranged in one spotarranged in one or two spotsarranged in one spotarranged in one spotarranged in one spotarranged in one spotFR1 length (L3)longshortshortlonglongshortFR5-FR6closely groupedclosely groupedclosely groupednot closely groupedclosely groupedclosely groupedFR8-10arranged in a trianglearranged in a trianglearranged in a trianglearranged in a transverse rowarranged in a transverse rowarranged in a triangleFR12shortminuteminuteminuteminuteshortPA12-14not closely groupedclosely groupedclosely groupedclosely groupedclosely groupednot closely groupedPA17between PA16 and PA26between or distal to PA26distal to PA26between PA16 and PA26distal to PA26between PA16 and PA26gANat least 1 long sensoriumat least 1 long sensoriumat least 1 long sensoriumall sensoria shortat least 1 long sensoriumat least 1 long sensoriumBasal 2° setae on MN (L3)222122Additional pores on mandiblepresent distallyabsentabsentabsentabsentabsent# of setae gMX2 right /left (L3)7/77–8/7–96/65/98/88/8MX13-14 (L3)MX13 much longerMX13 much longerMX13 much longersubequal in lengthsubequal in lengthMX13 much longerMX15presentpresentpresentabsentpresentpresentMX26presentpresentpresentabsentpresentpresentMX27presentpresentpresentabsentpresentpresentSubmentumvery widenarrowernarrowervery widenarrowernarrowerPrementumsclerotizedsclerotizedsclerotizedapparently membranoussclerotizedsclerotizedLA5pore-like?minuteminutelongminuteminuteLegs2-segmented1 or 2- segmentedunsclerotized1-segmentedunsclerotized3-segmented