Phthinomita, 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.5066845 |
persistent identifier |
https://treatment.plazi.org/id/FC30A5E9-F79C-4CEC-8E5E-58193FCFD148 |
taxon LSID |
lsid:zoobank.org:act:FC30A5E9-F79C-4CEC-8E5E-58193FCFD148 |
treatment provided by |
Felipe |
scientific name |
Phthinomita |
status |
gen. nov. |
Phthinomita View in CoL n. g.
Diagnosis
Body threadlike, elongate, cylindrical to ovoid, of consistent width through mid section, curving dorsally posteriorly, notched at level of male genital pore. Tegumental spines in incomplete lateral transverse rows, along entire length of body; 2–9 spines per row, covered in mucus or tegument. Tegumental papillae surround genital pores. Oral sucker vestigial, delimited posteriorly by constriction of body wall, internally separated from body proper by thin septum; sucker bearing 5–7 concentric rows of fine spines. Mouth opening ventrosubterminally, surrounded by vestigial oral sucker, opening between last spine row and body constriction. Oesophagus straight. Intestine Hshaped; anterior caeca short, unequal; posterior caeca longer than anterior pair, sinuous, unequal; right posterior caecum longer than left posterior caecum. Testes two; anterior testis originating posterior to, or in posterior half of, intercaecal field, rectangular or somewhat helical, margins irregular; posterior testis poorly developed (rudimentary), ovoid to elliptical, posterior to terminal genitalia, at posterior extremity of body. Vas deferens passing posteriorly from anterior testis; duct from posterior testis passing anteroventrally. Auxiliary external seminal vesicle absent. Cirrussac present, anterodorsally directed. Internal seminal vesicle spherical to ovoid; ejaculatory duct anterodorsally directed. Male pore opening on dorsal surface, medial. Ovary triangular to ovoid, posterior to, abutting or slightly overlapping posterior margin of anterior testis. Oviduct originating at posterior margin of ovary, passing posteriorly, dextral to cirrussac and vas deferens, joining with vitelline reservoir, entering oötype posteriorly. Oviducal seminal receptacle absent. Oötype elliptical to ovoid, anteroventrally directed, posterior to cirrussac, anterior to posterior testis, dorsal to vitelline duct. Mehlis’ gland prominent; gland cells extensive, extending posteriorly to posterior end of body, extending anteriorly to cirrussac. Laurer’s canal absent. Canalicular seminal receptacle absent. Uterus extending anteriorly from oötype, ventral to cirrussac and vas deferens, dorsal to vitelline duct and vitelline reservoir, posterior to, abutting or overlapping posterior margin of ovary passes posteriorly, expanding to form uterine chamber, narrowing posteriorly before opening at female genital pore. Uterine chamber originates at point where proximal portion of uterus (that passing anteriorly from oötype) passes posteriorly toward female pore, sinistral to ovary and oviduct, dorsal to proximal portion of uterus, vas deferens, vitelline duct and vitelline reservoir, extending from ovary to anterior margin of cirrussac, not muscular or surrounded by gland tissue. Metraterm absent. Female genital pore opening on dorsal surface, anterodextral to male pore. Vitellarium follicular; vitelline follicles tightly compacted, clumped in round or square clusters, anteriorly ventral and sinistral to oesophagus, intestine and anterior testis, extending posteriorly past posterior margin of ovary, ventral to vas deferens, ovary and uterus. Vitelline duct forming posterior to posterior margin of ovary, passing posteriorly ventral to vas deferens, cirrussac, uterus and Mehlis’ gland. Excretory vesicle elliptical; two discernable anteriorly directed arms seen at anterior margin. Excretory pore terminal. Parasites of the intertrabecular spaces of ventricle, atrium and bulbus arteriosus (heart) of IndoPacific marine fishes ( Labridae , Mullidae and Siganidae ).
Etymology
Generic name from “ Phthino ” (Gr. waste away, wave, decline, perish) and “ Mitos ” (Gr. thread), for the rudimentary second posterior testis and the general appearance of these worms.
Type species Phthinomita symplocos n. sp. from Siganus lineatus (Valenciennes) off Lizard Island.
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.