Syndesmis aonikenki, Brusa & Montes & Marcotegui & Martorelli, 2017
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publication ID |
https://doi.org/ 10.1016/j.ijppaw.2017.03.002 |
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publication LSID |
lsid:zoobank.org:pub:A20D54CF-7B34-4330-A5E3-A93DFB9866ED |
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persistent identifier |
https://treatment.plazi.org/id/7793A210-B3BD-4D80-9F8C-A4834E9E4EC5 |
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taxon LSID |
lsid:zoobank.org:act:7793A210-B3BD-4D80-9F8C-A4834E9E4EC5 |
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treatment provided by |
Felipe |
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scientific name |
Syndesmis aonikenki |
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3.2. Syndesmis aonikenki n. sp.
( Figs. 3 — 4 View Fig View Fig ).
3.2.1. Morphology
Worms 0.74 — 1.56 mm (1.11 ± 0.26, n = 8) long, 0.51 — 0.98 mm (0.75 ± 0.18, n = 8) maximum width at level of middle part of body. Mouth anteroventral, opening into a doliiform pharynx. Pharynx 87.5 — 130 M m (108.54 ± 15.46, n = 12) in diameter ( Figs. 3 View Fig and 4 View Fig ).
Paired testes on both sides of anterior body midline, slightly lobulated, extending from anterior region of pharynx overlapping vitellaria posteriorly ( Fig. 3 View Fig ). Ejaculatory duct close to midline, runs to the posterior body region, and coils posteriorly to the proximal stylet region ( Fig. 4B View Fig ); seminal vesicles not observed. Long penis stylet, beginning at funnel-like structure and projecting into male antrum, 105 — 220 M m (148.75 ± 50.22, n = 4) long. Male antrum opening into a common genital atrium. Genital pore at posterior tip of body ( Fig. 4A, C View Fig ).
Vitellaria branched, reaching the pharynx region and overlapping with testes, fan-like ( Fig. 4A View Fig ). Paired ovaries between vitellaria and filament glands, overlapping posterior vitellaria region. They are lobulated. The bodies of the filament glands are in the latero-posterior part of the body, reaching the posterior vitellaria region. The ducts of the filament glands meet before discharge in the last portion of the uterus.
Vitellaria and ovaries enter a large and wide seminal receptacle at its anterior portion. The lumen of the seminal receptacle narrows posteriorly to form the vagina and connect the common genital atrium ( Fig. 4C View Fig ). Without seminal bursa. Uterus ventrally, about 2/3 of the body length. Entry of uterus into common genital atrium ventral to entrances of male antrum and vagina. Filament glands occupying almost whole posterior third of body, almost lateral. Mature egg capsules ovoid, 90 — 125 M m (103.57 ± 12.89, n = 7) long, 57.5 — 100 M m (81.07 ± 16.94, n = 7) wide, brown in color, with a long filament on one pole ( Figs. 3 View Fig and 4A View Fig ). This filament is straight and thick and then has its distal region threaded ( Fig. 4A View Fig ) sometimes thickening at tip.
3.2.2. Etymology
This species is named in honor of the Aonikenk or Tehuelche who lived in the region where this species was found.
3.2.3. Study material
Eight whole mount specimens stained with Gill's Hematoxylin, three specimens cleared in polyvinyl-lactophenol and one specimen serially sectioned at 4- M m thick stained with Masson's trichrome method.
3.2.4. Specimens deposited
The studied specimens have been deposited at the Invertebrate Collection of the Museo de La Plata. Holotype MLP-He 7267, whole mount specimen stained with Gill's Hematoxylin. Paratype MLP-He 7269, whole mount specimen stained with Gill's Hematoxylin. MLP-He 7274, sagittal section specimen stained with Masson's trichrome method .
3.2.5. Localities Bahía Camarones (44 Ǫ 51, 2.09́S, 65 Ǫ 40, 52́W) .
3.2.6. Prevalence of infection 14% (5/36 urchins).
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.