Geomonhystera longispiculata
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Ordo: Monhysterida
Familia: Monhysteridae
Genus: Geomonhystera
Name
Geomonhystera longispiculata Prado-Vera & Ferris & Subbotin, 2018 – Wikispecies link – Pensoft Profile
- Geomonhystera longispiculata Prado-Vera, Ignacio Cid Del, 2018, Zootaxa 4471: 85-88.
Description
Measurements.Tables 2, 3 and 4. Female (n=7). Body slightly curved, tail curved ventrally after fixation. Cuticle 1 µm thick with conspicuous fine striation. Somatic setae scattered along the body. Cephalic region slightly convex, rounded in some specimens, 11–15 (14±1.5) µm wide. Lips triangular, fused at the base and clearly separated distally. Inner labial papillae conical, 2.0 µm long, outer labial setae unsegmented, 5–7 (5.9±0.7) µm long and 13–18 (14±1.8) % and 33–55 (42±7.3) % of head width respectively. Cephalic setae thinner, 3–5 (4.4±0.8) µm long and 21–39 (32±5.9) % of head width. Stoma funnel shaped. Amphidial fovea circular, 5.0 µm diameter, 17–26 (23±3.1) µm from anterior border to anterior of body. Pharynx a muscular tube, slightly expanded near posterior end, 160–182 (172±8.4) µm long. Nerve ring in the anterior part of the pharynx at 60–89 (76±11.4) µm from the anterior end. Cardia coneshaped, 5–13 (9±2.9) µm long and 8–14 (10±1.9) µm wide. Rectum 29–35 (33±2.4) µm long and 0.6–1.8 (1.3±0.5) times anal body diameter. Gonad (n=2) 424–726 (575±213) µm long, ovary short, 42–68 (55±18) % of body length, with one or two rows of oocytes. Vagina short, 8–15 (11.6±2.8) µm long, bent anteriorly. Vulval lips protruding; vulva-anus distance 34–51 (44±6.0) µm or 1.8–2.4 (2.2±0.2) times anal body diameter. Tail ventrally arcuate, 94–136 (112±13.5) µm long or 9.2–14 (11.5±1.4) % of the body length, with a few caudal setae. Three caudal glands arranged in tandem, with ducts terminating in a common ampulla, 9–11 (10.4±0.8) µm long, opening through a blunt-ended, terminal, spinneret, 2–3 (2.1±0.4) µm long. Male (n=9). Body slightly curved, tail strongly curved ventrally after fixation. Cuticle very thin, 1 µm, with conspicuous fine striation and scattered setae. The somatic setae are thin and in latero-ventral and latero-dorsal positions. Cephalic region low, slightly convex and rounded in some specimens, 12–16 (14.6±1.2) µm wide. Inner labial papillae conical, 2.0 µm long. Outer labial setae unsegmented, 5–8 (6.3±0.9) µm long and 36–58 (44±6.7) % of head width. Four cephalic setae, thinner, 4–5 (4.8±0.4) µm long and 27–42 (33±4.4) % of head width. Amphidial fovea circular, 5.0 µm diameter, anterior border 22–27 (24±1.5) µm from anterior of body. Pharynx a muscular tube slightly expanded near posterior end, 152–191 (171±11.1) µm long. Nerve ring in the anterior part of the pharynx, 70–87 (80±6.7) µm from the anterior end. Cardia cone-shaped, 5–13 (8.6±2.2) µm long and 7–11 (9.2±1.2) µm wide. Testis outstretched, 600–655 (625±22.7) µm long and 52–61 (59±4.6) % of total body length. Spermatozoa oval shape, 8–9 µm long. Spicules slender, 55–85 (75±9.0) µm long; gubernaculum 8–11 (9.8±0.8) µm long, slightly ventrally curved, with rounded distal tip. In the ventral precloacal region is a series of 39–57 papilloid cuticular folds. Tail ventrally arcuate, 114–142 (128±10.1) µm long or 11–13 (12±0.6) % of body length, with three large caudal glands ducted into an ampulla, 10–12 (11.2±1.0) µm long, and then through a 3 µm long, blunt-ended spinneret.
Diagnosis
Diagnosis and relationships.Geomonhystera longispiculata sp. n. is distinguished from all the species of the genus with males by the long, 55–85 (75±9.0) µm, slender spicules. The new species is also characterized by the conspicuous fine cuticular striation and somatic setae scattered along the body.
Materials Examined
Type locality and habitat. Collected on March 6, 2015, from a filamentous epicphyte, Misodendrum sp. (Misodendraceae) growing on a tree in the Botanical Garden of the Ecology Institute of Jalapa, Veracruz, México, 19°30'47.4" N 96°56'32.9” W, elevation 1400 m asl. Type specimens. Holotype female on slide 10388; allotype male on slide 10389, five paratype females on slide 10390 in CNHE. Other type material is deposited in the UCRNC on slide number 28541, WaNeCo slide number WT3718, and CPNC on slide number A-099.
Etymology
Etymology. The species name is based on the length of the spicules.
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: 85-88. doi
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