Phthinomita ingramae Nolan &amp; Cribb 2006, n. sp.
Creators: name: Nolan, Matthew J.
name: Cribb, Thomas H.
Publisher: name: Zenodo
Year: 2006
Subjects: Biodiversity
Taxonomy
Animalia
Platyhelminthes
Trematoda
Diplostomida
Aporocotylidae
Phthinomita
Phthinomita ingramae

description: <i>Phthinomita ingramae</i> n. sp. (Figs. 32–34) Type host: <i>Siganus punctatus</i> (Schneider), Goldspotted Rabbitfish (Perciformes: Siganidae). Site in host: Intertrabecular spaces of ventricle (heart). Type locality: Lizard Island, northern Great Barrier Reef (14°40'S 145°27'E), Queensland. Material examined: ex <i>S</i>. <i>punctatus</i>, Lizard Island (QLD), Aug. 2002, Jan. 2003, twenty specimens (Holotype no. QM G 225573; Paratype nos. QM G 225574–225579). Collector: M.J. Nolan. <i>Etymology</i> Specific name for Miss Emma J. Ingram, for her continued support and encouragement during the writing of this paper. <i>Description</i> Based on 20 whole mounts. With features of genus. Body slightly notched at male genital pore. Anterior testis originating posterior to intercaecal field, but antero­sinistral to distal termination of right posterior caecum, margins lobed. Posterior testis ovoid to spherical. Cirrus­sac tear­shaped. Internal seminal vesicle spherical, occupying ventral region of cirrus­sac; ejaculatory duct sinuous; prostatic cells not seen. Ovary obovate, posterior to posterior margin of anterior testis. Oviduct originating at centre of posterior margin of ovary, passing posteriorly dorsally, entering oötype postero­dorsally. Vitelline duct forming anterior to anterior margin of cirrus­sac, passing posteriorly sinuously, dextral to cirrus­sac, convoluted distally, entering oötype postero­dextrally. Oötype ovate. Mehlis' gland extending anteriorly to posterior margin of cirrus­sac, extending posteriorly to anterior margin of posterior testis. Uterus extending from oötype, ventral to oviduct. Uterine chamber forming laterally to posterior margin of ovary, straight, narrowing posteriorly, passing dorsally to female genital pore. Vitelline follicles extending anteriorly past intestinal bifurcation, extending posteriorly to posterior margin of uterine chamber, filling intercaecal field, ventral to ovary, oviduct and uterus. <i>Remarks</i> This species shows close affinity with the characters differentially diagnostic of the genus <i>Phthinomita</i> and is here identified as a new species in that genus. <i>Phthinomita ingramae</i> <b>n. sp.</b> is immediately distinguished by the combined possession of a body 2317–2983 (2645) long, an anterior testis that is positioned posterior to the intercaecal field but antero­sinistral to the distal termination of the right posterior caecum, an anterior testis 5.4–11.3 times longer than wide and 4.9–10.7 times longer than the posterior testis, a tear­shaped cirrus­sac and a uterine chamber that is 174 long on average. There are in addition, 10–38 base differences (2.8–11.7% sequence divergence) between the ITS2 rDNA sequence of <i>P. ingramae</i> and the remaining <i>Phthinomita</i> species sequenced here. Sequences from <i>Phthinomita ingramae</i> (three replicates) from <i>S</i>. <i>punctatus</i> off Lizard Island differ by 10 bases from those of <i>Phthinomita</i> sp. A (two replicates) from <i>S. virgatus</i> of Ningaloo Reef.
description: Published as part of <i>Nolan, Matthew J. &amp; Cribb, Thomas H., 2006, An exceptionally rich complex of Sanguinicolidae von Graff, 1907 (Platyhelminthes: Trematoda) from Siganidae, Labridae and Mullidae (Teleostei: Perciformes) from the Indo-west Pacific Region, pp. 1-80 in Zootaxa 1218 (1)</i> on pages 45-46, DOI: 10.11646/zootaxa.1218.1.1, http://zenodo.org/record/5064858