Pronoprymna petrowi ( Layman, 1930 ) Bray & Gibson, 1980
publication ID |
https://doi.org/ 10.1080/00222933.2021.1923852 |
publication LSID |
lsid:zoobank.org:pub:6217E5D2-00FD-4135-A8DA-CDBAFACA529B |
DOI |
https://doi.org/10.5281/zenodo.5496872 |
persistent identifier |
https://treatment.plazi.org/id/C0083640-B33B-AF33-79FB-FED7FCE6E6AB |
treatment provided by |
Plazi |
scientific name |
Pronoprymna petrowi ( Layman, 1930 ) Bray & Gibson, 1980 |
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Pronoprymna petrowi ( Layman, 1930) Bray & Gibson, 1980 View in CoL ( Figure 1 View Figure 1 (b))
Host. Clupea pallasii pallasii .
Site of infection. Intestine.
Locality. Off eastern shore of Kamchatka Peninsula (59°15ʹ6 N & 163°43ʹ9E) at a depth of 80 m GoogleMaps .
Prevalence. 15 of 30 host specimens (50%).
Intensity of infection. 1–120 worms per host specimen.
Deposited material. Two paragenophores (IPEE RAS 14295).
Representative DNA sequences. A partial 28S rRNA gene sequence was deposited in Genbank (NCBI) as MT872204 View Materials .
Description (based on a slightly macerated paragenophore). Body fusiform, length 1,018, maximum width 217 at level of ventral sucker, 21.3% of length. Tegument unarmed. Oral sucker cup-shaped, 98 × 126, length 9.6% of body length; oral opening subterminal. Ventral sucker 112 × 112, length 10.9% of body length. Sucker width ratio 1:0.89. Forebody 25.4% of body length. Prepharynx not detected. Pharynx 45 × 39, length 4.5% of body length. Oral sucker to pharynx width ratio 1:0.31. Oesophagus 87, 8.6% of body length. Intestinal bifurcation in posterior quarter of forebody. Caeca terminating at level of testes; post-caecal distance 43.9% of body length.
Testes two, entire, opposite, in anterior third of hindbody, separated from ventral sucker; left 116 × 70, length 11.3% of body length; right 105 × 63, length 10.3% of body length. Post-testicular region length 43.9% of body length. Cirrus-sac clavate, thin-walled, extending posteriorly slightly beyond ventral sucker, enclosing bipartite seminal vesicle, very small vesicular pars prostatica, and ejaculatory duct, 126 × 35, length 12.4% of body length. Genital atrium tubular. Genital pore median, anterior to ventral sucker.
Ovary trilobed, median, post-testicular, 126 × 88, length 12.4% of body length. Laurer’s canal not detected. Mehlis’ gland anterior to ovary. Uterus filling most of hindbody. Eggs 31 × 17. Vitellarium from two lateral compact oval masses, posterior to ventral sucker, left 91 × 49, length 8.9% of body length, right 70 × 45, length 6.9% of body length. Vitelline ducts wide, running towards median line of body, ventral to testes.
Excretory vesicle almost V-shaped; excretory pore terminal.
Remarks. Layman (1930) originally described Pr. petrowi under the name ‘ Monorcheides (?) petrowi ’ basing on specimens found in Osmerus dentex Steindachner & Kner, 1870 (Osmeridae) caught in the Peter the Great Bay ( Japan Sea). The genus affiliation of this species has been repeatedly discussed by various authors (see reviews of Margolis and Ching 1965; Shimazu 2018). Combination with the generic name Pronoprymna was proposed by Bray and Gibson (1980). Sucker-ratio 1:0.89, oral sucker cup-shaped and the cirrus-sac extending beyond the posterior edge of the ventral sucker, as well as the general morphology of the cirrus-sac, position of the testes, the shape and arrangement of the ovary and the vitellarium indicate that our specimens belong to Pr. petrowi (compare with Margolis and Ching 1965; Shimazu 2018).
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.
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