TABLE 3 in Larval chaetotaxy and morphometry of Megasternini: Cercyon (Paracercyon) Seidlitz, Cryptopleurum Mulsant and Pelosoma Mulsant (Coleoptera: Hydrophilidae)

TABLE 3. Comparative table of selected chaetotaxic characters among known first instar Cercyon larvae. CharacterC. analisC. convexiusculusC. praetextatusC. quisquiliusFR1shortlongshortshortFR4close to antennal socketclose to antennal socketfarther from antennal socketfarther from antennal socketgFR1left setae short and stoutleft setae rather longleft setae short and stoutleft setae short and stoutPA7shortlonglongshortPA12–141 short, 2 longall longall long1 long, two shortPA17distal to PA26between PA16 and PA26between PA16 and PA26distal to PA26PA18rather shortlonglongshortPA16 and PA28shortervery longvery longshortergMX28 setae7 setae8 setae7 setaeMX6similar to MX5shorter than MX5shorter than MX5shorter than MX5MX13–141 long 1 shortboth long1 long 1 short1 long 1 shortMX23rather shortlongrather shortshortMX24shorter than MP4as long as MP4shorter than MP4shorter than MP4LA1shortlonglongshortLA6shortervery longvery longvery longLA15at midlengthapicalat midlengthat midlength表3 已知圆胸隐翅甲属（Cercyon）一龄幼虫的部分毛序特征对比表 | 特征 | Cercyon analis（肛圆蕈甲） | Cercyon convexiusculus（凸圆蕈甲） | Cercyon praetextatus（饰圆蕈甲） | Cercyon quisquilius（粪圆蕈甲） | |------|---------------------------|-----------------------------------|-----------------------------------|---------------------------------| | FR1 | 短 | 长 | 短 | 短 | | FR4 | 贴近触角窝 | 贴近触角窝 | 远离触角窝 | 远离触角窝 | | gFR1 | 左侧刚毛短而粗壮 | 左侧刚毛稍长 | 左侧刚毛短而粗壮 | 左侧刚毛短而粗壮 | | PA7 | 短 | 长 | 长 | 短 | | PA12–14 | 1根短、2根长 | 均为长 | 均为长 | 1根长、2根短 | | PA17 | 位于PA26远端 | 处于PA16与PA26之间 | 处于PA16与PA26之间 | 位于PA26远端 | | PA18 | 偏短 | 长 | 长 | 短 | | PA16与PA28 | 较短 | 极长 | 极长 | 较短 | | gMX28刚毛数 | 7根刚毛 | 8根刚毛 | 7根刚毛 | （原文缺失对应数据） | | MX6 | 与MX5相似 | 短于MX5 | 短于MX5 | 短于MX5 | | MX13–14 | 1根长、1根短 | 均为长 | 1根长、1根短 | 1根长、1根短 | | MX23 | 偏短 | 长 | 偏短 | 短 | | MX24 | 短于MP4 | 与MP4等长 | 短于MP4 | 短于MP4 | | LA1 | 短 | 长 | 长 | 短 | | LA6 | 较短 | 极长 | 极长 | 极长 | | LA15 | 位于中部 | 位于顶端 | 位于中部 | 位于中部 |