Hypocreadium

Bray, Rodney A., Cribb, Thomas H. & Justine, Jean-Lou, 2009, New observations on the genus Hypocreadium Ozaki, 1936 (Digenea: Lepocreadiidae) in the Indo-West Pacific region, including the description of one new species, Zootaxa 2110, pp. 22-40 : 38-39

publication ID	https://doi.org/10.5281/zenodo.187863
DOI	https://doi.org/10.5281/zenodo.5633257
persistent identifier	https://treatment.plazi.org/id/8B7087CD-FF99-FF9F-FF77-FC4EC9FE0E9C
treatment provided by	Plazi (2016-04-19 14:19:46, last updated 2024-11-27 07:48:11)
scientific name	Hypocreadium
status

Treatment

Key to the species and forms of Hypocreadium View in CoL

1 Body oval; width less than 70% of length; ovary more or less pretesticular............................................................... 2

- Body closer to circular or wider than long; ovary inter- or post-testicular................................................................. 3

2 Genital pore anterior to intestinal bifurcation; uterus reaches posteriorly to ovary; sucker-ratio 1:1.22 ....................... ...................................................................................................................................... H. symmetrorchis Ozaki, 1936 View in CoL

- Genital pore posterior to intestinal bifurcation; uterus pre-ovarian; sucker-ratio 1:0.51–0.89 ...................................... ..................................................................................................................... H. biminensis ( Sogandares-Bernal, 1959)

3 Anterior notch distinct ................................................................................................................................................ 4

- Anterior notch absent or indistinct ............................................................................................................................... 6

4 Vitelline fields in forebody confluent or nearly so; caecal endings directed distinctly anteriorly ................................. ................................................................................................................................... H. toombo Bray & Justine, 2006 View in CoL

- Vitelline fields distinctly separated in forebody; caecal endings usually directed posteriorly, occasionally transverse or slightly anterior ........................................................................................................................................................ 5

5 Uterus always pre-ovarian; genital pore always at bifurcal level; ovary intertesticular................................................. ....................................................................................................................................... H. cavum Bray & Cribb, 1996 View in CoL

- Uterus may reach para- or post-testicularly; genital pore variable, between pharynx and bifurcal level; ovary inter to post-testicular ............................................................................ H. patellare Yamaguti, 1938 View in CoL (various forms, see text)

6 Body pyriform.............................................................................................................................................................. 7

- Body oval to circular.................................................................................................................................................... 8

7 Narrow gap between vitelline fields and body margins, fields confluent anteriorly...................................................... ........................................................................................................................ H. lactophrysi ( Nahhas & Cable, 1964) View in CoL

- Wide gap between vitelline fields and body margins, fields separated anteriorly ............................. H. picasso View in CoL n. sp.

8 Vitelline fields confluent in forebody .......................................................................................................................... 9

- Vitelline fields separated in forebody ......................................................................................................................... 10

9 Body oval, width 84–91% of length; vitelline fields confluent in hindbody; uterus pre-ovarian .................................. .................................................................................................................................. H. galapagoensis ( Manter, 1945)

- Body probably circular (edges folded); vitelline fields separated in hindbody; uterus para-ovarian ............................ .......................................................................................................................................... H. spinosum ( Manter, 1940) View in CoL

10 Vitelline fields widely separated in hindbody................................................................................................................. H. lamelliforme ( Linton, 1907) View in CoL (this species is poorly known and the entry in this key is based on Fig. 77 in Linton (1907) from the grey triggerfish, Balistes View in CoL capriscus Gmelin (as B. carolinensis Gmelin ) – the first host listed and considered type-host here; fig. 78 represents Dermadena lactophrysi Manter View in CoL (see Manter, 1945); Fig. 76 also probably represents a Dermadena View in CoL sp.)

- Vitelline fields confluent in hindbody ........................................................................................................................ 11

11 Caecal ends oriented anteriorly, uterus preovarian.......................................................... H. indicum ( Madhavi, 1972) View in CoL

- Caecal ends oriented posteriorly, uterus postovarian ................................................................................................. 12

12 Body broadly oval, width, 126–149% of body-length ...................................... H. grandiquamis Bray & Cribb, 1996

- Body more nearly circular, width <114% of body-length .......................................................................................... 13

13 Caecal endings transversely oriented; ovary more or less lobed; eggs 51–56 × 32–44 ................................................. .................................................................................................................................. H. scaphosomum ( Manter, 1940) View in CoL

- Caecal endings posteriorly oriented; ovary entire; eggs>64 × 40 ............................................................................. 14

14 Vitelline fields confluent in wide band in hindbody............................................................ H. balistes ( Nagaty, 1942) View in CoL

- Vitelline fields slightly separated in hindbody .................................. H. myohelicatum Bravo-Hollis & Manter, 1957 View in CoL

References

Bravo-Hollis, M. & Manter, H. W. (1957) Trematodes of marine fishes of Mexican waters. X. Thirteen Digenea including nine new species and two new genera from Pacific coast. Proceedings of the Helminthological Society of Washington, 24, 35 - 48.

Bray, R. A. & Cribb, T. H. (1996) The Australian species of Lobatocreadium Madhavi, 1972, Hypocreadium Ozaki, 1936 and Dermadena Manter, 1945 (Digenea: Lepocreadiidae), parasites of marine tetraodontiform fishes. Systematic Parasitology, 35, 217 - 236.

Bray, R. A. & Justine, J. - L. (2006) Hypocreadium toombo n. sp. (Digenea: Lepocreadiidae) in the yellow-spotted triggerfish Pseudobalistes fuscus (Perciformes: Balistidae) and additional lepocreadiids parasitizing fishes from the waters off New Caledonia. Zootaxa, 1326, 37 - 44.

Linton, E. (1907) Notes on parasites of Bermuda fishes. Proceedings of the United States National Museum, 33, 85 - 126.

Madhavi, R. (1972) Digenetic trematodes from marine fishes of Waltair Coast, Bay of Bengal. I. Family Lepocreadiidae. Journal of Parasitology, 58, 217 - 225.

Manter, H. W. (1940) Digenetic trematodes of fishes from the Galapagos Islands and the neighboring Pacific. Allan Hancock Pacific Expeditions, 2, 325 - 497.

Manter, H. W. (1945) Dermadena lactophrysi n. gen., n. sp. (Trematoda: Lepocreadiidae) and consideration of the related genus Pseudocreadium. Journal of Parasitology, 31, 411 - 417.

Nagaty, H. F. (1942) Trematodes of fishes from the Red Sea. Part 3. On seven new allocreadiid species. Publications of the Marine Biological Station Ghardaqa (Red Sea), 4, 1 - 27.

Nahhas, F. M. & Cable, R. M. (1964) Digenetic and aspidogastrid trematodes from marine fishes of Curacao and Jamaica. Tulane Studies in Zoology, 11, 169 - 228.

Ozaki, Y. (1936) Two new genera of the trematode family, Allocreadiidae. Zoological Magazine, 48, 513 - 518.

Sogandares-Bernal, F. (1959) Digenetic trematodes of marine fishes from the Gulf of Panama and Bimini, British West Indies. Tulane Studies in Zoology, 7, 69 - 117.

Yamaguti, S. (1938) Studies on the helminth fauna of Japan. Part 21. Trematodes of fishes, IV. Satyu Yamaguti, Kyoto, 139 pp.