Morphological characterization of Dujardinascaris spp. (Nematoda: Anisakidae) from the striped red mullet Mullus surmuletus in the Mediterranean Sea

R. Gamal Taha Hassan

doi:10.2478/helm-2019-0032

Figures & Tables

(A – E): Dujardinascaris spp. from Red Mullet Mullus surmuletus in Mediterranean Sea. A: Anterior end of male dorsal view, B: cephalic region of male, C: The posterior end of female subventral view, D: The posterior end of male ventral view, E: Egg. Scale bars: A,C 0.2; B 200 μm; D 0.3; E 50 μm.

(A – F): Scanning Electron Microscope of Dujardinascaris spp. (A): The cephalic region of the worm with interlocked processes, A amphid, L lip, It interlabium, T teeth, DP double papillae, SP single papilla, CP cuticular prolongation. (B): the anterior end showing the cephalic lateral pouches (arrows). (C): The middle region of nematode body showing the cuticular transverse striations. (D): The vulvar region with protruded vagina V. (E): The dorsal view of somatic region showing the longitudinal annulation LA, large rounded-like papilla LP. (F): The post-equatorial part of nematode body showing papillae P. Scale bars: A,D,H,I,K,L = 50 μm, B,C,EF,G,J = 10 μm.

(G – M): Scanning Electron Microscope of Dujardinascaris spp. (G): The ventral surface of the worm at cuticular region showing buttom-like papilla (arrow). (H): The cuticle at the posterior region of female worm showing the transverse striations. (I): The posterior end of female showing anus An & the caudal alae (arrows). (J): The cuticle at the anal region showing the transverse striations. (K): The posterior end of male showing the cuticular transverse striations. (L): The posterior end of male showing spicules (arrows). Scale bars: A,D,H,I,K,L = 50 μm, B,C,EF,G,J = 10 μm.

Morphometric comparison of some species of nematode Dujardinascaris from fishes with the present species_(The data for the previous described species are taken from the original descriptions)_

Characters	D. melapteruri	D. mujibi	D. mormyropsis	Dujardinascaris spp.
Length ♂	14.8	17 – 24	11.5 – 15.33	10 – 14.2
♀	12.3 – 35.0	23 – 38	26 – 43.22	13 – 22.5
Width ♂	0.3	0.25 – 0.65	0.38 – 0.54	0.33 – 0.47
♀	0.25 – 0.68	0.76 – 0.84	0.089 – 0.1	0.18 – 0.34
Lips L. ♂	70 μm	–	75 – 90 μm	70 – 98 μm
♀	50 – 110 μm		135 – 159 μm	50 – 90 μm
Interlabia L. ♂	–	–	30 – 45 μm	33 – 41 μm
♀			78 – 96 μm	40 – 60 μm
Esophagus L. ♂	1.7	2.25 – 2.75	1.32 – 1.84	1.21 – 1.66
♀	1.3 – 2.6	4.45 – 5.84	2.2 – 3.07	1.67 – 2.1
Esophagus W. ♂	–	0.11 – 0.15	0.08 – 0.11	0.062 – 0.071
♀		0.15 – 0.18	0.09 – 0.12	0.07 – 0.082
Nerve ring * ♂	0.35	–	0.42 – 0.56	0.35 – 0.37
♀	0.27 – 0.41		0.58 – 0.77	0.41 – 0.52
Excretory pore *♂	0.36	–	0.42 – 0.56	0.36 – 0.39
♀	0.4		0.58 – 0.81	0.46 – 0.57
Intestinal canal ♂	1.1	–	0.68 – 1.11	0.71 – 1.33
♀	0.77 – 2		1.19 – 1.73	1.11 – 1.43
Tail L.	0.08	–	0.12 – 0.17	0.11 – 0.17
	0.15 – 0.41
Spicule L.	1.4 μm	1.13 – 1.34 μm	1.7 – 1.81 μm	2.23 – 3.45 μm
Gubernaculum L.	–	–	0.186 – 0.2	0.08 – 0.11
Vulva *	–	–	9.13 – 15.92	0.093 – 1.15
Egg L.	–	–	0.06 – 0.09	0.052 – 0.09
Egg W.	–	–	0.052 – 0.072	0.04 – 0.078
Caudal alae	Absent	Absent	Absent	present
Host species	Malapterurus electricus	Pagrus pagrus	Mormyrops anguilloides	Mullus surmuletus
Locality	Khartoum, Sudan	Red Sea, Egypt	Central Africa	Mediterranean Sea, Egypt
Author	Sprent, (1990)	Morsy et al. (2013)	Moravec & Jirku, (2014)	Present study (2019)

Morphological characterization of Dujardinascaris spp. (Nematoda: Anisakidae) from the striped red mullet Mullus surmuletus in the Mediterranean Sea

Figures & Tables

Fig. 1

Fig. 2

Fig. 2

Morphometric comparison of some species of nematode Dujardinascaris from fishes with the present species_(The data for the previous described species are taken from the original descriptions)_

Paradigm

My account