Mordacia

Genus of jawless fishes

Southern topeyed lampreys

Mordacia mordax
Scientific classification
Kingdom:  | Animalia
Phylum:  | Chordata
Subphylum:  | Vertebrata
Infraphylum:  | Agnatha
Superclass:  | Cyclostomi
Class:  | Petromyzontida
Order:  | Petromyzontiformes
Family:  | Mordaciidae
T. N. Gill, 1893
Genus:  | Mordacia
J. E. Gray, 1851
Type species
Petromyzon mordax

J. Richardson, 1846

Synonyms

* Caragola Gray 1851 non Moore 1879

Mordacia is a genus of lamprey, the sole genus of the family Mordaciidae, also known as the southern topeyed lampreys.

The family Mordaciidae is most closely related to the lamprey family Geotriidae, which has a similar Gondwanan distribution, and both families diverged during the Early Cretaceous. Together, their common ancestor diverged from the Petromyzontidae during the Middle Jurassic.[1]

They are found in Chile and Australia; the Chilean and one Australian species (M. lapicida and M. mordax) are anadromous fish that spawn in Pacific-draining river basins and mature in the ocean, while the other Australian species (M. praecox) spends its whole life in freshwater. Phylogenetic evidence indicates ancient divergences within this genus, with the Chilean and Australian lineages diverging from one another during the Late Cretaceous (100 mya), although both Australian species only diverged from each other during the Pleistocene.[1]

## Species

[edit]

There are currently three recognized species in this genus:[2]

* Mordacia lapicida (J. E. Gray, 1851) (Chilean lamprey)
* Mordacia mordax (J. Richardson, 1846) (Australian lamprey)
* Mordacia praecox Potter, 1968 (Australian brook lamprey)

## References

[edit]

1. ^ a b Brownstein, Chase Doran; Near, Thomas J. (2023-01-23). "Phylogenetics and the Cenozoic radiation of lampreys". Current Biology. 33 (2): 397–404.e3. Bibcode:2023CBio...33E.397B. doi:10.1016/j.cub.2022.12.018. ISSN 0960-9822. PMID 36586410. S2CID 255278945.
2. ^ Froese, Rainer; Pauly, Daniel (eds.). "Species in genus Mordacia". FishBase. April 2013 version.

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Extant lamprey species

* Kingdom Animalia
* Phylum Chordata
* Class Hyperoartia
* Order Petromyzontiformes
* Family Petromyzontidae

Caspiomyzon|

* Caspian lamprey (C. wagneri)
* Greek lamprey (C. hellenicus)
* Ionian brook lamprey (C. graecus)

Entosphenus|

* Modoc brook lamprey (E. folletti)
* Pit-Klamath brook lamprey (E. lethophagus)
* Lake lamprey (E. macrostomus)
* Miller Lake lamprey (E. minimus)
* Klamath River lamprey (E. similis)
* Pacific lamprey (E. tridentatus)

Eudontomyzon|

* Carpathian Brook Lamprey (E. danfordi)
* Korean lamprey (E. morii)
* Ukrainian brook lamprey (E. mariae)
* Drin brook Lamprey (E. stankokaramani)
* Vladykov's lamprey (E. vladykovi)

Geotria|

* Pouched lamprey (G. australis)

Ichthyomyzon|

* Ohio lamprey (I. bdellium)
* Chestnut Lamprey (I. castaneus)
* Northern brook lamprey (I. fossor)
* Southern brook lamprey (I. gagei)
* Mountain brook lamprey (I. greeleyi)
* Silver lamprey (I. unicuspis)

Lampetra|

* Least Brook lamprey (L. aepyptera)
* Portuguese lamprey (L. alavariensis)
* Qurem lamprey (L. auremensis)
* Western river lamprey (L. ayresii)
* European river lamprey (L. fluviatilis)
* Kern brook lamprey (L. hubbsi)
* Turkish brook lamprey (L. lanceolata)
* (L. lusitanica)
* Pacific brook lamprey (L. pacifica)
* European brook lamprey (L. planeri)
* Western brook lamprey (L. richardsoni)

Lethenteron|

* Alaskan brook lamprey (L. alaskensis)
* American brook lamprey (L. appendix)
* Arctic lamprey (L. camtschatica)
* Siberian brook lamprey (L. kessleri)
* Western Transcaucasian lamprey (L. ninae)
* Far Eastern brook lamprey (L. reissneri)
* Lombardy lamprey (L. zanandreai)

Mordacia|

* Chilean lamprey (M. lapicida)
* Australian lamprey (M. mordax)
* Non-parasitic lamprey (M. praecox)

Petromyzon|

* Sea lamprey (P. marinus)

Tetrapleurodon|

* Mexican lamprey (T. spadicea)
* Mexican brook lamprey (T. geminis)

Taxon identifiers

Mordacia|

* Wikidata: Q140496
* Wikispecies: Mordacia
* ADW: Mordacia
* AFD: Mordacia
* BOLD: 54228
* GBIF: 2421254
* iNaturalist: 90040
* IRMNG: 1318798
* ITIS: 159746
* NCBI: 7754
* Open Tree of Life: 227493
* WoRMS: 269913

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