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Systematic position of the enigmatic Quentinia mesovitellinica (Rêgo, 1967) (Cestoda, Cyclophyllidea)

V. Haukisalmi
V. Haukisalmi
   | Dec 26, 2023
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Article Category: Research Note
Published Online: Dec 26, 2023
Page range: 246 - 252
Received: Sep 12, 2023
Accepted: Sep 21, 2023
DOI: https://doi.org/10.2478/helm-2023-0031
Keywords
© 2023 V. Haukisalmi, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Fig. 1.

A–D, Quentinia mesovitellinica (Rêgo, 1967), redrawn from Quentin (1967). A, scolex. B, early mature proglottid. C, late mature proglottid. D, gravid proglottid. E, Monoecocestus petiso Haverkost & Gardner, 2010, mature proglottid. F, G, Quentinia eljefe (Haverkost & Gardner, 2010) n. comb. F, mature proglottid. G, gravid proglottid (scale-bar not available). E–G redrawn from Haverkost & Gardner (2010). Scale-bars in micrometers. T, testes; CS, cirrus sac; O, ovary; Va, vagina; Vi, vitellarium; SR, seminal receptacle; U, uterus; VO, ventral longitudinal osmoregulatory canal; DO, dorsal longitudinal osmoregulatory canal.
A–D, Quentinia mesovitellinica (Rêgo, 1967), redrawn from Quentin (1967). A, scolex. B, early mature proglottid. C, late mature proglottid. D, gravid proglottid. E, Monoecocestus petiso Haverkost & Gardner, 2010, mature proglottid. F, G, Quentinia eljefe (Haverkost & Gardner, 2010) n. comb. F, mature proglottid. G, gravid proglottid (scale-bar not available). E–G redrawn from Haverkost & Gardner (2010). Scale-bars in micrometers. T, testes; CS, cirrus sac; O, ovary; Va, vagina; Vi, vitellarium; SR, seminal receptacle; U, uterus; VO, ventral longitudinal osmoregulatory canal; DO, dorsal longitudinal osmoregulatory canal.

Fig. 2.

Catenotaenia matovi Genov, 1971. A, mature proglottid, redrawn from Tenora et al. (1980). Longitudinal osmoregulatory canals ventral to terminal genital ducts; dorso-ventral position with respect to other organs undefined. B, pregravid proglottid, redrawn from Genov (1971). Scale-bars in micrometers. For symbols, see Fig. 1.
Catenotaenia matovi Genov, 1971. A, mature proglottid, redrawn from Tenora et al. (1980). Longitudinal osmoregulatory canals ventral to terminal genital ducts; dorso-ventral position with respect to other organs undefined. B, pregravid proglottid, redrawn from Genov (1971). Scale-bars in micrometers. For symbols, see Fig. 1.

Main morphologic features that separate Quentinia Spasskii, 1969 from Catenotaenia sensu lato (Catenotaeniidae) and associate it with Monoecocestus Beddard, 1914 sensu Beveridge (1994) (Anoplocephalidae sensu stricto).

Quentinia Monoecocestus Catenotaenia sensu lato
Dorsal longitudinal osmoregulatory canals, position lateral to ventral canals lateral to ventral canals medial to ventral canals, pass between arches of transverse connecting canals
Genital atrium, size prominent, capable of forming genital papilla prominent, capable of forming genital papilla inconspicuous, not capable of forming genital papilla
Genital pores, alternation irregularly in very short series regularly or irregularly in very short series irregularly in relatively long series
Vagina, position runs anterior to cirrus sac distally, opens anterior to male pore runs (partly) anterior to cirrus sac, opens anterior to male pore runs posterior to cirrus sac, opens posterior or postero-ventral to male pore
Ovary, shape symmetrical, arched symmetrical; arched, transversely elongated or ovoid asymmetrical, extensive
Vitellarium, position median median or slightly poral poral
Fully developed uterus, shape sparsely lobulated/sacculated without distinct trunk, secondary ramifications absent sparsely lobulated/sacculated without distinct trunk, secondary ramifications absent deeply lobulated with distinct trunk, secondary ramifications usually present (“dendritic”)
Pyriform apparatus in eggs, presence present in Q. eljefe, undefined in Q. mesovitellinica present absent
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