Dorylaimea

Figure 1.Crassolabium persicum sp. n. (all images are in lateral view) A Anterior region B Lip region and amphid fovea in surface C Pharyngeal expansion D Vagina E Spicules and lateral guiding piece F Female, posterior body region G Female, anterior genital branch H Male, posterior body region I Male, entire J Female, entire.

Figure 1.Longidorus cholevae sp. n. Female: A Anterior end F Habitus I Pharyngeal bulb J Anterior genital branch Male: G Habitus H Pharyngeal bulb Juveniles: B–E Habitus of first-, second-, third- and fourth-stage juveniles. Scale-bars: A, H, I, J 50 μm; B–G 1 mm.

Figure 2.Calcaridorylaimus castaneae sp. n. Female: A Pharyngeal gland nuclei B Anterior region C Pharyngeal region D Genital system E Vulval region F Sperm cells in uterus. Scale bars: A, B, E, F – 30 μm; C, D – 50 μm.

Figure 2.Crassolabium persicum sp. n. (light micrographs all in lateral view).A Female, entire B Anterior region C Pharyngo–intestinal junction D Female, genital system E Neck region F Male, entire G Male, posterior region H Vagina I Female, caudal region J Spicules K Lateral guiding piece L Oviduct–uterus junction M Lateral chord and pores. (Scale bars: A, F – 500 µm; B, H, K – 10 µm; C, G – 50 µm; D, E – 100 µm; I, J, L, M – 20 µm).

Figure 9.Longidorus cholevae sp. n. Scatter plot of the functional (˜, juveniles and adults, females in orange) and replacement (™, juveniles) odontostyle in relation to body length of the juvenile developmental stages and adults.

Figure 3.Calcaridorylaimus castaneae sp. n. Female: A Posterior region. Male: B, C Extruded spicules with supplements D Posterior region. Scale bar: A–D – 30 μm.

Figure 10.Phylogenetic relationships of Longidorus cholevae sp. n. and its closest species for the D2-D3 rDNA. Bayesian Inference strict consensus tree acquired under GTR+G model. Numbers at the nodes indicating posterior probabilities higher that 0.8 and bootstrap values more that 70% for ML and NJ are presented.

Figure 4.Calcaridorylaimus castaneae sp. n. Female: A Anterior end C Amphid F–I Tail shapes Male B Anterior end D Posterior end with extruded spicules, arrow indicating the spur E Posterior end. Scale bars: A, B, D–I – 20 μm; C – 6 μm.

Figure 11.Phylogenetic relationships of Longidorus cholevae sp. n. and its closest species for the partial 18S-ITS1 rDNA regions. Bayesian Inference strict consensus tree acquired under K2+G model. Numbers at the nodes indicating posterior probabilities higher that 0.8 and bootstrap values more that 70% for ML and NJ are presented.

Figure 5.Calcaridorylaimus castaneae sp. n. Female: A Entire body B Lip region D Prerectum, arrow pointing tongue-like valve E Pharyngeal bulb F Vulval region with posterior uterus G Vulval region with egg in posterior uterus H, I Vulval region J Cardia L Lateral field. Male: A Entire body C Lip region K Cardia M Supplements. Scale bars: A – 200 μm; B, C, M – 6 μm; E–L – 20 μm.

Figure 6.Calcaridorylaimus castaneae sp. n. Male: A Posterior end B Sperm cells in testis C–F Spicular region C Lateral piece of spicules D, E Extruded spicules, arrows pointing the spur F Spicules in the body. Scale bars: A, B – 20 μm; C–F – 18 μm.

This is an illustration of the life cycle of Trichuris trichiura, the causal agent of Trichuriasis.Created: 2002

Magnified 128X, this photomicrograph revealed some of the ultrastructural features displayed by a Trichuris trichiura egg. The nematode, or roundworm, is also called the human whipworm. T. trichiura eggs are 50µm-55µm by 20µm-25µm. As is exemplified by this specimen, eggs are football-shaped, thick-shelled, and possess a pair of polar plugs at each end. Eggs are passed unembryonated in stool.Created: 1979

This diagram depicts the various stages in the life cycle of the nematode Trichinella spiralis.Created: 1982

Magnified 500X, this photomicrograph of an unstained, formalin-preserved stool specimen mount, revealed the presence of a Trichuris vulpis nematode egg. T. vulpis is a whipworm that is common to dogs.Adult worms are 30 – 50nm in length, and as parasites, reside in the ceceum, a region of the large intestine where it is joined by the small intestine or ileum. This specie of whipworm, though common to canines, has been found in the human digestive tract.Created: 1973

Fig. 1. Fotomicrografía de la región anterior de la hembra. Foto: A. Esquivel

Fig. 2. Fotomicrografía de la región genital de la hembra. Foto: A. Esquivel

Fig. 3. Fotomicrografía de la región posterior de la hembra. Foto: A. Esquivel

Fig.1: Fotomicrografía de la región anterior de la hembra. Foto: A. Esquivel.

Fig.2: Fotomicrografía de la región posterior (cola) de la hembra. Foto: A. Esquivel.

Fig.1 Fotomicrografía de la región anterior de la hembra.Foto: A. Esquivel.

Fig.2 Fotomicrografía de la región genital de la hembra.Foto: A. Esquivel

Fig.3 Fotomicrografía de la región posterior de la hembra.Foto: A. Esquivel

Fig.1 Fotomicrografía de la región anterior de la hembra. Nótense los labios fuertemente separados y la longitud del odontoestilete. Foto: A. Esquivel.