A revised description of  Douëllou et Chishawa, 1995 (Monogenea: Ancyrocephalidae) from the gills of  (Siluriformes: Mochokidae) from South Africa

M. E. Raphahlelo; I. Přikrylová; M. M. Matla; J. Theron; W. J. Luus-Powell

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A revised description of Synodontella zambezensis Douëllou et Chishawa, 1995 (Monogenea: Ancyrocephalidae) from the gills of Synodontis zambezensis (Siluriformes: Mochokidae) from South Africa

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Band 53 (2016): Heft 4 (December 2016)

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Article Category: Research Article

Online veröffentlicht: 21. Nov. 2016

Seitenbereich: 363 - 371

Eingereicht: 19. Juli 2016

Akzeptiert: 19. Okt. 2016

DOI: https://doi.org/10.1515/helmin-2016-0038

Schlüsselwörter
Monogenea, Synodontis, revised description, molecular phylogeny, South Africa

© 2016 Institute of Parasitology, SAS, Košice

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

The sclerotized hard parts of Synodontella zambezensis;A – Dorsal anchors with dorsal bar, B – Ventral anchors with ventral transverse bar, C – Marginal hook and D – MCO. Scale bars: 10 μm.

Comparison of the sclerotized hard parts of Synodontella zambezensis; (a) specimens from current study and (b) paratype specimen. 1 – Dorsal anchors, 2 – Dorsal bar, 3 – Ventral anchors, 4 – Ventral transverse bar and 5 – MCO. Scale bar = 20 μm.

Unrooted phylogram for parasites of Siluriformes hosts constructed from a 477 bp dataset of the partial of SSU rDNA and the entire ITS1 rDNA sequences. Statistical node support is shown as follow: Bayesian posterior probability/maximum likelihood bootstrap/Neighbour joining bootstrap. Branch lengths correspond to the expected number of substitutions per site under Bayesian inference. Sequence obtained in the present study is given in bold.

Host characters, weight (g) and length (cm); total number of parasites and the prevalence, mean intensity and range of intensity of infection for Synodontella zambezensis in Synodontis zambezensis examined from Flag Boshielo Dam

Sampling date	n	Mean weight (g)(min – max)	Mean total length (cm)(min – max)	Total numberof parasites	Prevalence%	Mean intensity	Intensity of infection(min – max)
February 2012	15	69.3(44.9 – 108.8)	17.9(15.7 – 20.5)	856	100	57.1	5 – 195
March 2012	15	70.1(27.5 – 168.9)	17.5(13.8 – 23.3)	504	100	33.6	9 – 69
April 2012	11	71.2(30.1 – 187.9)	18.3(13.8 – 21.0)	766	100	69.64	7 – 160
June 2012	5	66.3(48.9 – 84.0)	17.1(16.0 – 19.3)	687	100	137.4	62 – 250
July 2012	3	77.1(69.8 – 85.5)	18.3(17.5 – 19.4)	133	100	43.3	8 – 102
November 2012	30	69.1(21.2 – 129.2)	17.8(13.0 – 21.6)	2096	100	69.9	27 – 144
December 2012	13	50.5(36.0 – 73.7)	16.3(14.0 – 18.0)	3843	100	295.6	82 – 524
January 2013	15	55.1(41.1 – 120.5)	16.6(15.3 – 20.5)	1990	100	132.7	61 – 153

Comparative measurements (in μm, mean and range values in parentheses) of all Synodontella spp. parasitizing on the mochokid catfi shes of the genus Synodontis Cuvier, 1817

	S, arcopenis Dossou et Euzet, 1993	S. davidi Dossou et Euzet, 1993	S, melanoptera Dossou et Euzet, 1993	S. synodontii (Paperna et Thurston 1968)	S, zambezensisDouëllou et Chishawa, 1995	S, zambezensis Present study
Type host	S. sorex	S. membranaceus	S. melanopterus	S. victoriae	S. zambezensis	S. zambezensis
Site	Gills	Gills	Gills	Gills	Gills	Gills
Type locality	Bénin and Mali	Mali	Bénin	Uganda	Zimbabwe	South Africa
Material studied	30	3	20	5	15	30
Body length	909 (710 – 1060)	880 (510 – 1070)	636 (420 – 830)	500 – 700	850 (690 – 1100)	748.5 (558.5 – 865)
Body width	185 (120 – 250)	218.3 (205 – 240)	145 (100 – 180)	–	140 (110 – 200)	167 (126.3 – 196.3)
Pharynx diameter	50 (40 – 50)	–	30	–	–	46.1 (40 – 52.5)
Dorsal anchor
a. total length	61.3 (55 – 68)	58.0 (55 – 62)	54.1 (50 – 61)	70 – 100	55.0 (49.6 – 61.5)	50.9 (48.2 – 53.8)
b. shaft	52.1 (47 – 60)	49.3 (48 – 52)	44.2 (38 – 54)	–	–	40.1 (36.3 – 43.2)
c. outer root	18 (1 – 3)	4.5 (3 – 5)	1.0 (0 – 2)	2 – 5	2.0 (1.2 – 2.9)	5
d. inner root	13.6 (8 – 17)	19.6 (18 – 22)	16.6 (12 – 20)	15 – 20	16.6 (13.5 – 20.0)	13.3 (12.5 – 15)
e. point	14.6 (10 – 17)	18.6 (17 – 20)	19.5 (16 – 24)	–	20.3 (17.2 – 23.5)	15.8 (15 – 16.9)
Dorsal transverse bar
total length	44.7 (38 – 50)	49.3 (47 – 52)	33.5 (27 – 43)	50 – 70	42.9 (37.5 – 49.0)	1.4 (36.9 – 42.5)
max. width	5.8 (5 – 7.5)	7	3.7 (2 – 6)	–	7.3 (5.5 – 9.0)	5.6 (4.4 – 6.3)
Ventral anchor
a. total length	46.3 (43 – 56)	34.8 (38 – 42)	35.9 (32 – 40)	50 – 80	35.1 (31.3 – 41.5)	31.7 (30 – 32.5)
b. shaft	46.1 (43 – 52)	32.3 (30 – 34)	26 (24 – 31)	–	–	25.9 (22.5 – 27.5)
c. outer root	6.6 (4 – 10)	5.5 (5 – 6)	3.5 (2 – 5)	12 – 15	4.7 (3.3 – 5.9)	4 (2.5 – 5)
d. inner root	7.6 (5 – 10)	16.3 (16 – 17)	14.6 (12 – 17)	18 – 20	14.0 (10.7 – 16.5)	12.3 (11.3 – 13.8)
e. point	10.3 (7 – 14)	21.3 (20 – 24)	15.2 (14 – 18)	–	18.3 (16.8 – 22.2)	15.3 (15 – 17.5)
Ventral transverse bar
total length	47.7 (43 – 53)	38.3 (37 – 40)	29.4 (26 – 32)	30 – 40	37.4 (32.0 – 44.0)	1.2 (33.8 – 37.5)
max. width	6.9 (5 – 10)	5.3 (5 – 6)	5.8 (4 – 9)	–	10.4 (8.9 – 11.9)	3.8 (2.5 – 3.8)
Marginal hooks	13 (11 – 12)	–	14 (11 – 13)	–	14.8 (11.1 – 19.0)	15
MCO
copulatory tube	–	120	51.9 (35 – 65)	–	49.6 (41.9 – 56.1)	46.9 (42.5 – 50)
accessory piece	–	48 – 50	18.2 (14 – 24)	–	27.9 (21.3 – 33.7)	30.1 (28.8 – 32.5)

Uncorrected pair-wise genetic distances between species included in the phylogenetic analysis, for a 477 bp dataset

		1	2	3	4	5	6	7	8
1	Synodontella zambezensis
2	Schilbetrema sp.	0.080
3	Pseudancylodiscoides sp. 1	0.109	0.086
4	Pseudancylodiscoides sp. 2	0.111	0.084	0.006
5	Thaparocleidus vistulensis	0.107	0.088	0.057	0.050
6	Thaparocleidus siluri	0.103	0.084	0.057	0.050	0.008
7	Cleidodiscus pricei	0.118	0.105	0.086	0.086	0.095	0.088
8	Quadriacanthus sp.	0.120	0.101	0.084	0.082	0.065	0.065	0.109
9	Lamellodiscus erythrini	0.163	0.150	0.140	0.146	0.146	0.146	0.182	0.146

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A revised description of Synodontella zambezensis Douëllou et Chishawa, 1995 (Monogenea: Ancyrocephalidae) from the gills of Synodontis zambezensis (Siluriformes: Mochokidae) from South Africa

Article Category: Research Article

Online veröffentlicht: 21. Nov. 2016

Seitenbereich: 363 - 371

Eingereicht: 19. Juli 2016

Akzeptiert: 19. Okt. 2016

DOI: https://doi.org/10.1515/helmin-2016-0038

Schlüsselwörter
Monogenea, Synodontis, revised description, molecular phylogeny, South Africa

© 2016 Institute of Parasitology, SAS, Košice

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Fig. 1

Fig. 2

Fig. 3

Host characters, weight (g) and length (cm); total number of parasites and the prevalence, mean intensity and range of intensity of infection for Synodontella zambezensis in Synodontis zambezensis examined from Flag Boshielo Dam

Comparative measurements (in μm, mean and range values in parentheses) of all Synodontella spp. parasitizing on the mochokid catfi shes of the genus Synodontis Cuvier, 1817

Uncorrected pair-wise genetic distances between species included in the phylogenetic analysis, for a 477 bp dataset

A revised description of Synodontella zambezensis Douëllou et Chishawa, 1995 (Monogenea: Ancyrocephalidae) from the gills of Synodontis zambezensis (Siluriformes: Mochokidae) from South Africa

Article Category: Research Article

Online veröffentlicht: 21. Nov. 2016

Seitenbereich: 363 - 371

Eingereicht: 19. Juli 2016

Akzeptiert: 19. Okt. 2016

DOI: https://doi.org/10.1515/helmin-2016-0038

SchlüsselwörterMonogenea, Synodontis, revised description, molecular phylogeny, South Africa

© 2016 Institute of Parasitology, SAS, Košice

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Fig. 1

Fig. 2

Fig. 3

Host characters, weight (g) and length (cm); total number of parasites and the prevalence, mean intensity and range of intensity of infection for Synodontella zambezensis in Synodontis zambezensis examined from Flag Boshielo Dam

Comparative measurements (in μm, mean and range values in parentheses) of all Synodontella spp. parasitizing on the mochokid catfi shes of the genus Synodontis Cuvier, 1817

Uncorrected pair-wise genetic distances between species included in the phylogenetic analysis, for a 477 bp dataset

Schlüsselwörter
Monogenea, Synodontis, revised description, molecular phylogeny, South Africa