Mature females of Mermis nigrescens are exceptionally large for a nematode (100 mm long) and unusual in having a single eye.
Specimens of the mature adult female of Mermis nigrescens Cobb 1926 were collected as they were ovipositing on vegetation near Vancouver, Canada.
The four cephalic and two amphidial sensilla of Mermis nigrescens are attached to the anterior cuticle about 46 [micro]m and 64 [micro]m, respectively, from the tip (Fig.
When an adult female of Mermis nigrescens crawls on a horizontal surface, it glides on its ventral surface (unlike other nematodes), its anterior is elevated above the surface, and there is a continual side-to-side (lateral) and vertical (dorsoventral) bending of the "head" (Burr et al.
Scanning motion, ocellar morphology and orientation mechanisms in the phototaxis of the nematode Mermis nigrescens.
Naturally crystalline hemoglobin of the nematode Mermis nigrescens.
Properties of a hemoglobin from the chromatrope of the nematode Mermis nigrescens.
The role of hemoglobin in the phototaxis of the nematode Mermis nigrescens.
The structure of the filament layer is diagrammed in Figure 1 for the two main types of muscle fiber architecture found in nematodes: platymyarian, represented here by Caenorhabditis elegans, and coelomyarian, represented by Mermis nigrescens.
In the coelomyarian muscle type, seen in Mermis nigrescens (19, 29) and various other large nematodes including Ascaris lumbricoides (reclassified suum) (1214), the plate of myofilaments is folded lengthwise so that most of the contractile layer lies radially [ILLUSTRATION FOR FIGURE 1 OMITTED].
Free-living stages of Mermis nigrescens (about 100 mm in length and 0.