【牛首属】
牛首属（学名：Bucephalus），是牛首科下的一个属。
==下属物种==
* Bucephalus allahabadensis Srivastava, 1963
* Bucephalus anguillae Spakulova, Macko, Berrilli & Dezfuli, 2002
* Bucephalus aori Maurya & Agarwal, 1992
* Bucephalus aoria Verma, 1936
* Bucephalus arabiana Varma, 1982
* Bucephalus arabiansis Dwivedi, 2007
* Bucephalus attuai Bhadauria & Dandotia, 1988
* Bucephalus baeri Maillard & Saad-Fares, 1981
* Bucephalus bagarius Srivastava, 1963
* Bucephalus barina Srivastava, 1938
* Bucephalus bharatica Agarwal & Kumar, 1986
* 双齿牛首吸虫 Bucephalus binidentacularis Wang, 1977
* Bucephalus blanchardi (Stossich, 1898) Yamaguti, 1958
* Bucephalus brevitentaculatus Corkum, 1967
* Bucephalus carangis Yamaguti, 1970
* Bucephalus chilensis Szidat, 1963
* Bucephalus clupeae (Van Beneden, 1870)
* Bucephalus confusus Velasquez, 1959
* Bucephalus crux Levinsen, 1881
* Bucephalus cynoscion Hopkins, 1956
* Bucephalus damriyasai Bray, Palm & Theisen, 2018
* Bucephalus dasashwamedhai Maurya & Agarwal, 1992
* Bucephalus elacatus Yadav, 1977
* Bucephalus elegans Woodhead, 1930
* Bucephalus fischthali Gupta & Tiwari, 1985
* Bucephalus fragilis Velasquez, 1959
* Bucephalus gadorum (Rathke, 1799) Yamaguti, 1958
* Bucephalus gangai Maurya & Agarwal, 1992
* Bucephalus gangeticus Srivastava, 1938
* 鲳牛首吸虫 Bucephalus gazzae Shen, 1990
* Bucephalus gorgon (Linton, 1905) Eckmann, 1932
* Bucephalus gwaliorensis Bhadauria & Dandotia, 1988
* Bucephalus hainanensis Shen, 1990
* Bucephalus harpodontis Wang, 1980
* Bucephalus heptanematodes Pan, 1988
* Bucephalus heterotentaculatus Bravo-Hollis & Sogandares-Bernal, 1956
* Bucephalus indicus Srivastava, 1938
* Bucephalus intermedius Ulicny, 1878
* Bucephalus jagannathai Verma, 1936
* Bucephalus kaku Yamaguti, 1970
* Bucephalus kanagurtai Gupta & Tiwari, 1985
* Bucephalus kathetostomae (Manter, 1934) Manter, 1940
* Bucephalus keni Agrawal & Agarwal, 1989
* Bucephalus labracis Paggi & Orecchia, 1965
* Bucephalus leognathi Velasquez, 1959
* Bucephalus loeschi Hopkins, 1958
* Bucephalus margaritae Ozaki & Ishibashi, 1934
* Bucephalus marinus Vlasenko, 1931
* Bucephalus markewitschi Koval, 1949
* Bucephalus minimus (Stossich, 1887) Nicoll, 1914
* Bucephalus mystusi Chandra & Banerjee, 1993
* Bucephalus mytili Cole, 1935
* Bucephalus nagatyi El-Shahawi & Al-Bassel, 1992
* Bucephalus neoscombropsi Parukhin, 1979
* Bucephalus octotentacularis Kakaji, 1969
* Bucephalus ornatus Cao, Tang & Tang, 1990
* Bucephalus paraheterotentaculatus Velasquez, 1959
* Bucephalus polymorphus von Baer, 1827
* Bucephalus priacanthi Manter, 1940
* Bucephalus purshottami Agarwal & Kumar, 1986
* Bucephalus ranjeetpurai Maurya & Singh, 2005
* Bucephalus scorpaenae Manter, 1940
* Bucephalus sebastichthydis Yamaguti, 1959
* Bucephalus sextentaculatus Yamaguti, 1970
* Bucephalus skrjabini Akhmerov, 1963
* Bucephalus solitarius Kohn, 1966
* Bucephalus sphyraenae Yamaguti, 1952
* Bucephalus stunkardi Swarup & Jain, 1985
* Bucephalus syndosmyae Lebour, 1912
* Bucephalus tetratentacularis Singh & Sinha, 1977
* Bucephalus thapari Gupta & Tiwari, 1985
* Bucephalus tridentacularia Verma, 1936
* Bucephalus trifurcatus Wang, 1980
* Bucephalus tritentacularis Srivastava, 1963
* Bucephalus uranoscopi Yamaguti, 1934
* Bucephalus urophyci Szidat, 1961
* Bucephalus varanasiensis Maurya & Agarwal, 1992
* Bucephalus xiamenensis Liu, 1994
* Bucephalus yamagutii Gupta & Singh, 1985