Geomonhystera galindoi
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Ordo: Monhysterida
Familia: Monhysteridae
Genus: Geomonhystera
Name
Geomonhystera galindoi Prado-Vera & Ferris & Subbotin, 2018 – Wikispecies link – Pensoft Profile
- Geomonhystera galindoi Prado-Vera, Ignacio Cid Del, 2018, Zootaxa 4471: 89-93.
Description
Measurements.Tables 2, 3 and 4. Female: (n=25). Body shape of fixed specimens almost straight to slightly arcuate ventrad; cuticle thin, 1 µm thick, with very fine and visible transverse striae, Very small setae sparsely scattered over whole body; head 12–19 (15.5±1.4) µm wide and 3–6 µm high; lips not fused; inner labial papillae very small, conical, 2–3 (2.1±0.4) µm long; outer labial setae not segmented, 7–10 (9.4±0.9) µm long or 47–67 (61±6.0) % of head width; cephalic setae thin, 5–7 (5.8±0.8) µm diameter, 28–47 (36±5.7) % of head width; amphid openings rounded 3–5 (4.7±0.6) µm diameter with the anterior edge 15–25 (21±2.4) µm from the head, both amphids at the same level; pharynx muscular, 156–198 (179±10.7) µm long or 16.6– 21 (18.9±1.1) % of the body length, 438–688 (587±62.2) µm from the vulva and 476–735 (632±61.9) µm from the anus; nerve ring at 40–104 (81±15.2) µm from the anterior end; cardia at base of pharynx 5–17 (11±3.4) µm long and 6–15 (9.4±2.7) µm wide, composed of two conspicuous cells. Outer zone of intestinal walls with many granular refractive inclusions; rectum muscular, 25–45 (33±4.8) µm long and 1.0–2.2 (1.6±0.3) times anal body diameter; anterior anal lip slightly protruding. Distance between vulva and anus 35–50 (41±4.5) µm or 1.5–2.2 times anal body diameter. Gonad (n=7) 132–322 (228±69.6) µm long, ovary short with one row of oocytes, 13–35 (23±7.3) % of body length. Vulval lips slightly protruding; vagina with slightly thickened walls, post-vulval uterine sac absent. Tail tapers evenly, 126–184 (149±12.4) µm long or 13–21 (15.8±1.8) % of the body length, with a few setae; three caudal glands, posterior to the anus and in line, ducted into a common ampulla 5–10 (8.1±2.3) µm long and then through a conspicuous, terminal spinneret which is 2–5 (3.1±0.8) µm long. Male (n=3): After fixation, body slightly curved with the posterior end strongly curved ventrally, giving a hook-shaped appearance; cuticle 1 µm thick, with exceedingly fine striations; somatic setae rare to few; head 12 µm wide; six lips not fused; inner labial papillae very small, coniform 2 µm long; outer labial setae unsegmented, 6 µm long or 50% of head width; cephalic setae thin, 4–5 (4.3±0.6) µm long or 33– 42 (36±4.8) of head width; amphid apertures rounded, 4 µm diameter and 21–23 (21.7±1.2) µm, or 1.7–1.9 times the head width from the anterior edge of the amphid to the anterior end, respectively; both amphids at the same level; pharynx muscular 160–166 (163±3.0) µm long; nerve ring at 80–85 (82±2.7) µm from the anterior end; cardia 6–10 (8.7±2.3) µm long and 7–11 (9.0±2.0) µm wide, composed of conspicuous cells. Copulatory spicules equal in length, slightly arcuate, 30–34 (32.5±2.1) µm long, with acute tips and non-cephalate; gubernaculum 9–11 (10.3±1.1) µm long. In the ventral precloacal region is a series of 30–37 papilloid cuticular folds. Tail 109–145 (129±18.4) µm long with a few thin setae (4–8 observed), ending in conspicuous, terminal, spinneret 4–6 µm long.
Diagnosis
Diagnosis and relationships.Geomonhystera galindoi sp. n. has fine cuticlar striation and sparsely–scattered body setae; the outer labial setae are unsegmented; vulval lips are slightly protruding; vulva-anus distance 35–50 (41±4.4) µm and 1.5–2.2 times anal body diameter; the outer labial setae are 47–67% of head width and the cephalic setae thin, unsegmented and 28–47 (36±5.7) % of the body width; caudal gland ampulla 5–10 µm long and spinneret conspicuous, 2–5 µm long.
Materials Examined
Mexico Izayoc
Etymology
Etymology. The species is dedicated to the memory of Dr. Jorge Galindo Alonso, eminent Mexican plant pathologist and outstanding professor and artist.
Taxon Treatment
- Prado-Vera, Ignacio Cid Del; Ferris, Howard; Subbotin, Sergei A.; 2018: Six new and one known species of Geomonhystera (Nematoda, Monhysteridae) from moss, an epiphytic plant and soil in México and Ecuador, Zootaxa 4471: 89-93. doi
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