Geomonhystera michoacana
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Ordo: Monhysterida
Familia: Monhysteridae
Genus: Geomonhystera
Name
Geomonhystera michoacana Prado-Vera & Ferris & Subbotin, 2018 – Wikispecies link – Pensoft Profile
- Geomonhystera michoacana Prado-Vera, Ignacio Cid Del, 2018, Zootaxa 4471: 82-85.
Description
Measurements.Tables 2 and 3.
G.mexiquense G. michoacana G.longispiculata G.ecuatoriana G. galindoi G.chiautzingoensis sp. n. sp. n. sp. n. sp. n. sp. n. sp. n.Body length0.905 0.782 0.952 0.820 0.952 0.782a33.5 31.3 39.7 30.4 35.3 34b5.9 5.4 5.6 5.4 5.3 5.1c7.9 6.5 8.4 7.8 6.2 8.5c’5.2 6.0 5.7 5.5 6.6 5.4Head width13 14 13 11 16 11Body width27 25 24 27 27 23Outer labial setae length 9.0 8 6 6 9 5Cephalic setae length5 5 5 5 5 4amphid to head18 16 25 17 19 19Pharynx length152 146 170 152 179 154Pharynx in % of body length16.8 18.7 17.9 18.5 18.8 19.7Rectum length30 29 35 25 34 31Rectum/anal body diameter0.94 1.5 0.74 1.3 1.5 1.8V%83 79.5 82.2 81.6 79.2 80.8Vulva to anus distance32 28 47 39 39 42Vulva to anus distance / 1.5 anal body diameter1.4 2.4 2.1 1.7 2.5Tail length115 120 113 105 153 92Tail length in % of body 12.7 length15.3 11.9 12.8 16.1 11.8Tail length/vulva-anus distance3.6 4.2 2.4 2.7 3.9 2.2 Female (n=5). Body strongly curved ventrally after fixation; cuticle 1 µm thick, with very fine striations; body setae rare, occasionally on tail and cervical region; head convex continuous with body contour, head width 13–14 (13.8±0.5) µm; lips triangular, fused at the base and clearly separated distally; inner labial papillae very small, coniform, 2.0 µm long; outer labial setae not segmented, 7–8 (7.5±0.6) µm long or 36–57 (48±9.0) % of head width; cephalic setae thin, 5–6 µm long or 36–43 (38±4.2) % of head width; amphid apertures rounded, 4.0–5.0 (4.2±0.5) µm diameter, 15–21 (17±2.4) µm from the anterior margin to the head, both amphids at the same level; pharynx muscular, 123–178 (147±21.8) µm long or 18–21 (19±1.3) % of the body length, and 368–537 (441±68.1) µm from vulva and 395–673 (495±108.6) µm from anus; nerve ring 63–80 (69±7.8) µm from the anterior end; cardia 6–10 (8.0±2.0) µm long and 7–12 (9.4±2.3) µm wide, composed of three small cells. Rectum 23–32 (27±4.0) µm long and 1.3–1.7 (1.5±0.2) times anal body diameter, thick, anterior end almost at level of vulva. Anterior anus lip slightly protruding. Gonad difficult to see in all specimens. Vulva lips slightly protruding; vagina short, post-vulval uterine sac absent; vulva-anus distance 24–37 (29±4.9) µm or 1.4–1.9 (1.6±0.2) times anal body diameter. Tail tapering evenly, 110–135 (118±10.4) µm long or 15–17 (16±1.1) % of the body length, with a few setae; three caudal glands ducted into an ampulla 5–10 (7.5±2.4) µm long and then into the conspicuous spinneret, 2–3 µm long.
G. mexiquense sp. n. (n=17)G. michoacana G.longispiculata G.ecuatoriana G. galindoi sp. n. (n= 5) sp. n. (n=7) sp. n. (n=2) sp. n. (n=25)G. chiautzingoensis sp. n. (n=9)Body length0.6–1.1 (0.9±0.1)0.63–0.91 (0.8±0.1)0.73–1.1 (1.0±0.1)0.75–0.96 (0.84±0.1)0.75–1.1 (0.95±0.1)0.71–1.1 (0.86±0.1)a22–39 (32±4.6)25–31 (28±2.5)29.39.7 (37±3.7)30–37 (34±3.3)29–39 (35±2.7)31–37 (34±2.2)b4.1–7.1 (5.5±0.6)4.7–5.9 (5.2±0.4)4.5–6.2 (5.7±0.6)5.4–6.6 (6.1±0.6)4.8–6 (5.3±0.3)4.9–6.1 (5.4±0.4)c5.1–9.0 (7.1±0.9)5.7–6.8 (6.4±0.4)7.4–10.8 (8.8±1.1)7.2–8.6 (7.9±0.7)4.5–7.5 (6.5±0.6)7.5–10 (8.4±1.0)c´5.2.6.4 (5.9±0.4)5.8–7.1 (6.3±0.5)4.8–7.2 (5.8±0.8)5.5–5.9 (5.7±0.2)4.3–9.2 (6.7±0.9)4.4–8 (5.9±1.0)Head width13–16 (15.2±0.7)13–14.0 13.8±0.5)11–15 (14±1.5)11–12 (11.3±0.6)12–19 (16±1.4)9–12 (10±0.9)Body width25–30 (26.9±1.5)22–27 (25±1.8)24–30 (27±1.9)22–27 (24±2.8)23–31 (25±2.1)21–28 (25.5±2.2)Pharynx length147–174 (160±8.4)123–178 (147±21.8)160–182 (172±8.4)113–152 (139±22.5)156–198 (179±10.9)133–185 (159±16.4)Outer labial setae7.0–10 (8.9±0.9)7.0–8.0 (7.5±0.6)5–7 (5.8±0.7)5–6 (5.3±0.6)7–10 (9±1.0)4–7 (4.8±1.0)Cephalic setae5–8 (6.1±0.9)5–6 (5.3±0.6)3–5 (4.4±0.8)4–5 (4.3±0.6)5–7 (5.8±0.8)3–5 (3.6±0.7)Amphid to head15–22 (19.2±1.9)15–21 (17±2.4)17–26 (23±3.1)13–18 (16±2.7)15–25 (21±2.4)16–25 (21±2.9)Pharynx % of body length14–24 (18±2.1)18–21 (19±1.3)16–22 (17.7±2.0)15–18.5 (16.5±1.8)16.6–21 (18.9±1.1)17–20 (18.5±1.4)Rectum length27–36 (31.6±2.5)23–32 (27±4.0)29–35 (33±2.4)25–30 (27±2.7)25–45 (33±4.9)25–44 (31±5.9)Rectum/anal body 0.9–1.8 diameter (1.5±0.2)1.3–1.7 (1.5±0.2)0.64–1.8 (1.3±0.5)1.3–1.6 (1.4±0.2)1.0–2.2 (1.6±0.3)0.6–2.2 (1.4±0.7)V%74–84 (80±2.7)78–80 (79±0.9)79–86 (83±2.4)80–82 (81±1.0)77–86 (80±1.8)80–86 (82±1.8)Vulva to anus31–42 (36±3.1)24–37 (29±4.9)34–5 (44±6.0)37–48 (41±5.9)35–50 (41±4.5)37–50 (42±4.4)Vulva to anus/anal 1.5–2.0 body diameter (1.7±0.2)1.4–1.9 (1.6±0.2)1.8–2.4 (2.2±0.2)2.1–2.5 (2.2±0.3)1.5–2.2 (1.9±0.2)2–3.4 (2.5±0.4)Tail length112–135 (123±6.2)110–135 (118±10.4)94–136 (113±13.5)103–112 (107±4.7)126–184 (149±12.6)79–131 (104±19.4)Tail in % of body length11–19.5 (14±1.9)15–17 (16±1.2)9.2–14 (11.5±1.4)12–14 (12.8±1.1)13–21 (15.8±1.8)10–13 (12±1.3)Tail/vulva-anus3.2–3.8 (3.5±0.2)3.6–4.6 (4.1±0.4)2–4 (2.6±0.7)2.3–2.8 (2.6±0.3)3.1–4.4 (3.7±0.3)1.9–2.9 (2.5±0.3) Male. Unknown.
Diagnosis
Diagnosis and relationships.Geomonhystera michoacana sp. n. has a body that is strongly ventrally curved after fixation; the cuticle appears smooth but actually is finely striated; relatively few setae, primarily located in cervical and tail regions; the tail is 15–17 (16±1.1) % of body length and the rectum is 23–32 (27±4.0) µm long.
Materials Examined
Mexico The Tzararacua National Park
Etymology
Etymology. The species name recognizes that the type locality is in Michoacan State.
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: 82-85. doi
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