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Head of a spider showing poison gland (c) and its relation to the chelicera (a)

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Head of a spider showing poison gland (c) and its relation to the chelicera (a).jpg Head and pronotum of (a) dog flea; (b) of cat flea; (c) of hen flea (d) Nycteridiphilus (Ischnopsyllus) hexactenusThumbnailsIxodes ricinus; male, ventral aspectHead and pronotum of (a) dog flea; (b) of cat flea; (c) of hen flea (d) Nycteridiphilus (Ischnopsyllus) hexactenusThumbnailsIxodes ricinus; male, ventral aspectHead and pronotum of (a) dog flea; (b) of cat flea; (c) of hen flea (d) Nycteridiphilus (Ischnopsyllus) hexactenusThumbnailsIxodes ricinus; male, ventral aspectHead and pronotum of (a) dog flea; (b) of cat flea; (c) of hen flea (d) Nycteridiphilus (Ischnopsyllus) hexactenusThumbnailsIxodes ricinus; male, ventral aspect