Horsehair worms are slender (1/25 to 1/8 inch wide), very long (4 to 24. Gordius dimorphus larvae are similar to previous light microscope descriptions. Some species of flies lay their eggs on other insects or on objects that may. One large spine is present on the posterior portion of the postseptum. On the surface of each projection, 3 pairs of aculeiforms spines are aligned and lean toward the proboscis opening. The worldwide phylum Nematomorpha, that parasitise aquatic and terrestrial invertebrates, is a relict group unrelated to any other living or extinct phylum. The proboscis is retractile, dorsoventrally flattened, with 1 pair of forceps-like projections on its distal-most portion. They do not harm people, pets, or plants. They have turned up in bird baths, water troughs, wet sidewalks, toilets, and crops in moist soil. In New Hampshire they are mostly found during the late spring and summer. Three concentric rings with 6 spines each surround the proboscis. Download Resource Introduction Horsehair worms are very long, slender parasites of insects that are found in moist places. Larvae have a cylindrical body, annulated and divided into 2 sections, plus an anterior preseptum and a posterior postseptum.
dimorphus (2 males and 1 female) were maintained under laboratory conditions until oviposition, which occurred within long strings commonly referred to as egg strings. The morphologies and DNA sequences of 29 adult horsehair worms (24 Acutogordius and 5 Chordodes) were examined. Scanning electron microscopy was used to analyze superficial features of Gordius dimorphus Poinar, 1991, larvae that might serve as generic or specific diagnostic characters.
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