Homestios janinecairae, Warren & Bullard, 2021

Warren, Micah B. & Bullard, Stephen A., 2021, Fish blood flukes (Digenea: Aporocotylidae) from Indonesia: Two new genera and species infecting the banded eagle ray, Aetomylaeus nichofii (Bloch and Schneider, 1801) Capape´and Desoutter, 1979 (Myliobatiformes: Myliobatidae) from Borneo, International Journal for Parasitology: Parasites and Wildlife 15, pp. 43-50 : 47

3.3. Homestios janinecairae n. gen ( Figs. 3–4 )

3.3.1. Generic diagnosis

Body 9 × longer than wide, dorsoventrally flattened, muscular, aspinous. Rosethorn-shaped spines absent. Nervous system comprising paired lateral nerve cords. Anterior sucker aspinous, lacking peduncle, diminutive. Mouth subterminal. Pharynx absent. Oesophagus extending sinuously posteriad along midline for ≤ 1/4 of body length; posterior oesophageal swelling present. Intestine inverse U-shaped, asymmetrical; posterior caeca shorter than oesophagus, connecting to oesophagus ventrally, lacking diverticulae, terminating in anterior half of body. Testis single, medial, curving, lacking lobed margins. Vas deferens long,> 70% of seminal vesicle length, extending posteriad from testis. Cirrus-sac present, enveloping internal seminal vesicle and cirrus. Internal seminal vesicle distinct, longer than vas deferens. Extruded cirrus short, <5% of seminal vesicle length. Auxiliary external seminal vesicle absent. Common genital pore dorsal, post-gonadal. Ovary medial, post-caecal, wholly anterior to uterus; post-ovarian space comprising 1/3 of body length. Vitellarium follicular, diffuse, asymmetrical. Laurer’ s canal absent. O¨otype indistinct. Uterus post-gonadal, not extensively convoluted, extending posteriad before curving anteriad extending anterior to posterior margin of ovary before crossing midline and extending posteriad; uterine eggs irregular. Uterine seminal receptacle absent. Excretory vesicle small, medial, with arms, visible in posterior most region of body.

Figures

Fig. 3-4. Homestios janinecairae Warren and Bullard n. gen., n. sp. (Digenea: Aporocotylidae) from the heart of the banded eagle ray, Aetomylaeus nichofii (Bloch and Schneider, 1801) Capape´and Desoutter, 1979 (Myliobatiformes: Myliobatidae). (3) Body of holotype (USNM No. 1642774), dorsal view. Bar = 250 μm. (4) Genitalia of holotype (USNM No. 1642774), dorsal view. Bar = 100 μm. Mouth (mo), oesophagus (os), vitellarium (vit), intestine (in), testis (t), ovary (ov), vas deferens (vd), uterus, (u), ascending uterus (au), descending uterus (du), seminal vesicle (sv), cirrus (c), and common genital pore (cgp).