TABLE 2 in Morphology of the egg-case and larva of Paracymus aeneus (Germar) (Coleoptera: Hydrophilidae)

TABLE 2. Comparison of morphological characters of immature stages of Paracymus. For references, see Table 1.
CharacterP. aeneusP. pygmaeusP. subcupreusP. rufocinctusEgg-caseMast of egg-caseLong, slender?Short, stoutLong, slenderLarvaNumber of nasale teeth3443 and small ventral irregular teethEpistomal lobeProjecting as far as nasaleNot projecting further than nasaleProjecting as far as nasaleDistinctly projecting further than nasaleShape of epistomal lobeRoundedRounded, slightly angulateRoundedAngulateNumber of setae on gFR22223 (two on apex, one lateral)FR2Present, pore-like?Absent?Position of PA7Midlength of head capsule?Posterior third of head capsule?Number of inner teeth on mandible3332Antennal segment 2Without cuticular spines?Without cuticular spinesWith cuticular spinesDorsal surface of stipesLargely membranousSclerotized?SclerotizedSclerotizedMaxillary palpomere 1Incompletely cylindrically sclerotized?Incompletely cylindrically sclerotizedCylindrically sclerotizedCuticular spines on maxillary palpomere 1AbsentPresentPresentAbsentDorsal teeth on mentumA few teeth?Many teeth (L1), a few teeth (L3)Many teethSecondary setae on distal margin of mentum2–4 pairs?6 or 7 pairs3 pairsCuticular spines on anterior corner of mentumPresent (indistinct or absent in L3)?Absent?Absent?Cuticular spines of prementumPresent?PresentAbsentLigulaShortLong, as long as palpusLong, slightly shorter than or as long as palpusVery long, more than twice as long as palpusLigulaPartly sclerotized?SclerotizedMembranousPosition of LA12 on ligulaApical area?Apical areaSubapical areaThorax and abdomenWeakly lobedLobedWeakly lobedStrongly lobedDorsal sclerites of abdominal segments 2–6One pair of small, oval scleritesSingle sclerite, transverseSingle sclerite, transverseOne pair of sclerites and two transverse scleritesAbdominal lobesMembranous?MembranousSclerotized
......continued on the next page