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Family Rhyacichthyidae - Loach gobies
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Order |
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Class |
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Actinopterygii |
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No. in FishBase |
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Genera : 2 | Species : 3 Eschmeyer's Catalog of Fishes |
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Environment |
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Fresh : Yes |
Brackish : Yes |
Marine : Yes |
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Division |
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Peripheral/diadromous |
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Aquarium |
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none |
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First Fossil Record |
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Remark |
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Distribution: Indo-Australian Archipelago, Philippines, China, and Solomon Islands.
All amphidromous (Keith et al. in press 2014).
Compressed tail. Depressed head. Eyes small. Upper lip fleshy. Interpelvic space wide. Broad pectoral fins; rays 21 or 22. With an adhesive or sucking disc comprised of the lower surface of head, anterior part of the body, and the paired fins. Dorsal fins quite apart. First dorsal with 7 weak spines; second dorsal with 1 spine and 8 or 9 soft rays. One weak spine in anal fin; 8 or 9 soft rays. About 35-40 ctenoid scales in lateral line. Well developed lateral line system on head and body. Lunate caudal fin. About 32 cm maximum length.
Further characterized by the following primitive characteristics: complete lateral line, with canal pores in grooved scales on the side of the body; presence of infraorbital and supratemporal lateral canals and pores in one genus, Rhyacichthys, absent in Protogobius; cephalic portion of lateral line canal continues with the body lateral line in Rhyacichthys, not in Protogobius, where there is a break above pectoral fin base; preoperculum broadened and reaches symplectic in Rhyacichthys while two bones barely meet in Protogobius; presence of two infraorbital bones, lacrimal plus one infraorbital; metapterygoid reaches toward quadrate and not incontact with endopterygoid; broad and stout endopterygoid; well-developed scapula and extends dorsally to separate uppermost pectoral radial from the cleithrum; presence of dorsal postcleithrum; presence of three epurals (shared with Terateleotris); small dorsal and ventral procurrent catilages in the caudal fin and do not support anterior unsegmented rays (Ref. 92840). |
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Etymology |
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Greek, rhyax, -akos = rushing stream + Greek, ichthys = fish ( Ref. 45335). |
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Reproductive guild |
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guarders |
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Typical activity level |
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Main Ref  |
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Coordinator |
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Deep Fin Classification  |
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Osteichthyes | Actinopterygii | Actinopteri | Neopterygii | Teleostei | Osteoglossocephalai | Clupeocephala | Euteleosteomorpha | Neoteleostei | Eurypterygia | Ctenosquamata | Acanthomorphata | Euacanthomorphacea | Percomorphaceae | Gobiomorpharia | Gobiiformes | Gobioidei | Rhyacichthyidae |
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Important recommendation:
The list below must not be used as an authority reference synonymy list like those found in scientific published revisions, which must be the source to be used and cited eventually when they exist.
Rather, it reflects the current content of FishBase, and the progress with respect to synchronization with the Catalog of Fishes. However, we think it can be useful for users to assess the quality of information in FishBase, to start new work on the family, or to cross-check with other lists.
But we appreciate to be cited in publications when this list has been of any working value. In particular, for published scientific, we suggest then to cite it in the Material and Method section as a useful tool to conduct the research, but again, not as a taxonomic or nomenclatural authority reference.
Unless it is explicitly precised, the list is not complete, please search all original names published for the family in the Catalog of Fishes (genera, species), including those with uncertain or unknown status, that are not included in FishBase when they are not attached to a valid species.
This list uses some data from Catalog of Fishes (not shown but used to sort names).
In the column CofF, the digit indicates the status of synchronization with CofF: 0: Not checked; 1: Same status; 2: Different status; 3: Other combination; 4: Synonym in CofF; 5: Species/Subspecies issue; 6: Synonym of another species in CofF; 7: Not in CofF; 8: Should not be in CofF. The CofF version currently used is the one published on 23-07-2014 (Ref. 97102).
The list ordered as follows:
- When subfamilies are recognized, nominotypical subfamily first then other subfamilies by alphabetical order.
- Type genus of the family first (or of subfamily when subfamilies are recognized) then other genera by chronological order of description (and alphabetical order).
- Type species of the genus first by chronological order (and alphabetical order), with last listed misapplied names in a light gray font.
- ! Marks misspellings of the species names that must not be used.
Please send comments and corrections if you detect errors or missing names.
| Scientifc name | Status | Senior/Junior synonym | Combination | CofF |
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Rhyacichthys aspro (Valenciennes, 1837) | accepted | senior | new | |
Platyptera aspro Valenciennes, 1837 | synonym | senior | original | 2 |
! Rhyacichthys asparo (Valenciennes, 1837) | synonym | senior | new | |
Rhyacichthys guilberti Dingerkus & Séret, 1992 | accepted | senior | original | 2 |
Protogobius attiti Watson & Pöllabauer, 1998 | accepted | senior | original | 2 |