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DERMAPTERA (earwigs) GRYLLOBLATTODEA (iceworms, rock crawlers) MANTOPHASMATODEA (African rock crawlers )
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Embiodea(=Embioptera) Zoraptera Dermaptera Grylloblattodea Mantophasmatodea ? Orthoptera Plecoptera Phasmatodea prognathous head Aquatic nymphs Ovipositor lost Terrestrial nymphs Silk glands No silk glands Cerci modified to forceps Cerci not modified Saltatorial hind legs Hind legs not saltatorial
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Dermaptera Number of Species Common names Distinguishing characteristics Other features Typical habitats Hexapod Orders >1900 earwigs Derma - skin, ptera - wing - cerci - large forceps - fossorial - damp, dark - females show parental care
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Myths about earwigs
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Earwig Food
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Dermaptera - Cerci
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Dermaptera – Life cycle Female lays eggs in top few cm of soil Hatch in 1 week Female tends eggs & nymphs for 2 weeks Overwinter in soil Mate and complete 1 more cycle Mate
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Suzuki, J.Ins.Sci. 10:2-8 Effect of maternal care
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Suzuki, J.Ins.Sci. 10:2-8
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Female preference in offspring feeding - high quality food - dyed green - Low quality food - no dye Mas et al, Proc. R. Soc. B 276 2847-2853
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Kohno, Res. Pop. Ecol. 39:11-16 Matricide 86.7%
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Giant earwig – St. Helena
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Grylloblattodea Number of Species Common names Distinguishing characteristics Other features Typical habitats Hexapod Orders 25 Iceworms, rock crawlers Gryllo - cricket, blatto - roach - near melting snow, litter in alpine forests -multi-segmented cerci -wingless -live in cold habitats -restricted to Northern Hemisphere -omnivorous
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Grylloblattid - Habitat
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Grylloblattid – Life cycle Female lays eggs in soil or moss Hatch in 1 month to 3 years Nymphs – 8 instars (about 7 years) Females sexually mature after 1 year Mate
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Grylloblattid Distribution
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Mantophasmatodea Number of Species Common names Distinguishing characteristics Other features Typical habitats Hexapod Orders 8 African rock crawlers, gladiators, heelwalkers Manto - mantid, phasmato - stick insect -xeric, rocky habitat -wingless -enlarged arolium -closest relative - Grylloblattodea -carnivores
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Discovered in amber
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Mantophasmatodea - Predatory adaptations Large eyes Spines on forelegs
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Mantophasmatodea - Life cycle Eggs hatch - juveniles develop in winter (wet) months Autumn rains (May) Mating Eggs laid in egg pod -resists desiccation
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Mantophasmatodea - Relationship to other orthopteroid orders Egg cases (roaches, mantids) Predatory adaptations (mantids) Wingless (grylloblattids) Prolonged mating (phasmids) Substrate communication (stoneflies) Male eaten after mating (mantids) Male much smaller than female (mantids)
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Mantophasmatodea - Distribution
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Mantophasmatodea - Distribution Grylloblattids Mantophasmatodea
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Embiodea(=Embioptera) Zoraptera Dermaptera Grylloblattodea Mantophasmatodea ? Orthoptera Plecoptera Phasmatodea prognathous head Aquatic nymphs Ovipositor lost Terrestrial nymphs Silk glands No silk glands Cerci modified to forceps Cerci not modified Saltatorial hind legs Hind legs not saltatorial Notoptera = Grylloblattodea + Mantophasmatodea
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