Macvicaria adomeae Aken' Ova, Cribb & Bray 2008

Based on 8 unflattened, whole-mount specimens and 1 set of serial sagittal sections and measurements of 5 gravid unflattened whole-mount worms. Body elongate, spindle shaped, maximum width in region of ventral sucker, 1,140-1,578 (1,315) × 302-363 (331); width to length ratio 1:3.4-4.3 (4.0). Oral sucker globular, opening ventrally subterminal, 88-104 (95) × 98-110 (113). Ventral sucker transversely oval, in anterior third of body, 158-179 (167) × 181-213 (101); sucker width ratio 1:1.8-1.9 (1.9). Forebody 358-456 (396) long, 27-35 (30)% of body-length. Prepharynx short, dorsal to oral sucker. Pharynx subglobular, 48-59 (55) × 60-70 (65); pharynx to oral sucker width ratio 1:1.5-1.6 (1.6). Oesophagus distinct, short. Intestinal bifurcation in forebody, 107-166 (134) anterior to ventral sucker. Caeca terminate blindly close to posterior extremity. Excretory pore ventrally subterminal. Testes 2, oval, entire, contiguous to slightly separated, tandem, in posterior half of body, anterior 115-161 (136) × 121-145 (131), posterior 147-193 (166) × 121-159 (143). Post-testicular area 213-387 (300) long, 19-27 (23)% of body-length. Cirrussac elongate, clavate, thick walled, extends from point just posterior to posterior margin of pharynx, overlaps ventral sucker dorsally to its aperture (n=2), sometimes to level of (n=2) or posterior to posterior margin of ventral sucker (n=2), 303-412 (371) × 61-92 (74). Internal seminal vesicle tubular, sinuous, broadest at posterior end, fills broad posterior portion of cirrus-sac, surrounded by gland cells anteriorly. Pars prostatica distinct, thick walled, surrounded by gland cells. Ejaculatory duct long, thick walled. Genital atrium small. Genital pore antero-sinistral to intestinal bifurcation, midway between lateral margin and oesophagus, usually with cirrus protruding, (n=4), 189-209 (199) from anterior end, 13-18 (15)% of body-length. Ovary entire, spherical, contiguously anterior to or antero-dextral to anterior testis, 73-117 (89) × 78-115 (95). Mehlis’ gland indistinct, usually anterior to ovary, occasionally sinistral (n=1) to ovary. Canalicular seminal receptacle saccular, usually dorsal (n=4), sometimes antero-dextral (n=1), or sinistral to ovary, overlapping left side of ovary and anterior portion of anterior testis (n=1). Laurer’s canal present, opens dorso-sinistrally to ovary. Uterus coils intercaecally between anterior testis and ventral sucker, sometimes overlaps caeca ventrally, and ovary and testis dorsally, then passes to genital pore without coiling. Metraterm distinct, thick walled, overlaps left caecum. Eggs few, large, operculate, oval, 61-78 (70) × 28-50 (37). Vitelline follicles extend from 182-202 (194) from anterior extremity, 19-27 (23)% of body-length, to 11-38 (26) from posterior extremity; lateral fields may be continuous (n=3) or interrupted in ventral sucker area (n=3), ventral fields separate in forebody, and posteriorly to posterior margin of posterior testis, confluent or almost in post-testicular area; dorsal field confluent in forebody and post-testicular area always with continuous medial and sometimes bilateral or unilateral interruption in ventral sucker, uterine and gonad areas; follicles lie lateral, ventral and dorsal to caeca; anterior limit sometimes level with posterior end of oesophagus (n=3) or more anteriorly to point roughly level with mid-way between anterior and posterior ends of oesophagus (n=3). Excretory vesicle I-shaped, with narrow posterior end surrounded by few gland cells, passes anteriorly to point dorsal to posterior third of ovary. Etymology: This species is named for the mother of the first author.

Type-host: Sillaginodes punctatus (Cuvier) (Sillaginidae). Type-locality: Off American River, South Australia 35°48’S, 137°46’E. Site: Gut. Material studied: 9 Off American River, South Australia, December 1995. Type-material: Holotype: QM G230424, paratypes: QM G230425-230427, BMNH 2008.7.5.44-45.