Phthinomita robertsthomsoni, Nolan & Cribb, 2006
publication ID |
https://doi.org/ 10.11646/zootaxa.1218.1.1 |
publication LSID |
lsid:zoobank.org:pub:46D415C4-4133-4148-8F4A-74E97206BCD3 |
DOI |
https://doi.org/10.5281/zenodo.5066881 |
persistent identifier |
https://treatment.plazi.org/id/01CBBB79-E84F-4CA1-80AC-1AD82FEED152 |
taxon LSID |
lsid:zoobank.org:act:01CBBB79-E84F-4CA1-80AC-1AD82FEED152 |
treatment provided by |
Felipe |
scientific name |
Phthinomita robertsthomsoni |
status |
sp. nov. |
Phthinomita robertsthomsoni View in CoL n. sp. ( Figs. 41–43 View FIGURES 41–43 )
Type host: Siganus argenteus (Quoy & Gaimard) , Forktail Rabbitfish ( Perciformes : Siganidae ).
m; 42, 100 m.
Site in host: Intertrabecular spaces of ventricle (heart).
Type locality: Lizard Island, northern Great Barrier Reef (14°40’S 145°27’E), Queensland GoogleMaps .
Material examined: ex S. argenteus, Lizard Island (QLD), Aug. 2002, Jan. 2003, twentytwo specimens (Holotype no. QM G 225613 ; Paratype nos. QM G 225614–225622 ) .
Collector: M.J. Nolan.
Etymology
Specific name for our good friend and colleague Mr Ashley RobertsThomson who collected the first S. argenteus of this study.
Description
Based on 22 whole mounts. With features of genus. Body notched at male genital pore. Intestine; posterior caeca sinuous. Anterior testis originating at posterior end of intercaecal field, margins lobed. Posterior testis tearshaped. Cirrussac tearshaped. Internal seminal vesicle spherical, occupying most of cirrussac, positioned ventrally; ejaculatory duct straight; prostatic cells large. Ovary oblanceolate, overlapping posterior margin of anterior testis. Oviduct originating at centre of posterior margin of ovary, sinuous, dorsal to vas deferens, entering oötype posterodorsally. Vitelline duct forming anterior to cirrussac, passing posteriorly sinuously, dextral to vas deferens; vitelline reservoir forming anterior to anterior margin of cirrussac, entering oötype posterodextrally. Oötype ovoid. Mehlis’ gland extending anteriorly to posterior margin of cirrussac, extending posteriorly to midsection of posterior testis. Uterus extending from oötype, slightly sinuous, sinistral to oviduct. Uterine chamber forming anterior to posterior margin of ovary and anterior testis, ventral to ovary, sinuous, curving dorsally posteriorly to female pore. Vitelline follicles extending anteriorly past intestinal bifurcation, extending posteriorly to level female genital pore, sinistral and dextral to oesophagus, filling intercaecal field, dextral to anterior testis.
Remarks
This species possesses the characters differentially diagnostic of the genus Phthinomita and is here identified as a new species in that genus. Phthinomita robertsthomsoni is immediately distinguished by the combined possession of a body 3784–5706 (4851) long, a body 192 wide on average, an anterior testis 38–62% of the body length and 14.8–31.3 times longer than the posterior one, a posterior testis 15–46% of the body width, a cirrussac 64–96 (78) x 45–80 (64), an ovary 87–183 (138) x 64–144 (103) and a uterine chamber 257–385 (319) x 39–80 (59). The species differs further in having an anterior testis with the anterior margin in the posterior end of the intercaecal field, an ovary with an anterior margin lateral to the posterior margin of the anterior testis, a uterine chamber originating anteriorly to the posterior margin of both the anterior testis and the ovary and vitelline follicles extending anteriorly past the intestinal bifurcation.
There are in addition, 20–29 base differences (5.8–8.6% sequence divergence) between the ITS2 rDNA sequence of P. robertsthomsoni and the remaining Phthinomita species sequenced here. Between the sequences from P. robertsthomsoni (two replicates) from S. argenteus off Lizard Island and P. sasali (one replicate) from S. doliatus off Palau there are 20 base differences.
QM |
Queensland Museum |
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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