Brochiloricaria Isbruecker & Nijssen, 1979

Raphael Covain & Sonia Fisch-Muller, 2007, The genera of the Neotropical armored catfish subfamily Loricariinae (Siluriformes: Loricariidae): a practical key and synopsis., Zootaxa 1462, pp. 1-40: 27

publication ID

z01462p001

publication LSID

lsid:zoobank.org:pub:D1F13841-BD7B-4D00-B57D-9CBEC187B83C

persistent identifier

http://treatment.plazi.org/id/CA7BAF53-DA04-E550-B4D7-F2509283E592

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scientific name

Brochiloricaria Isbruecker & Nijssen, 1979
status

 

Brochiloricaria Isbruecker & Nijssen, 1979  ZBK  .

Type species: Brochiloricaria chauliodon Isbruecker, 1979  ZBK  .

Holotype: ZSM 23342, Argentina, Entre Rios Province, Isla El Dorado, Parana , Guaza (locality not stated). 

Gender: feminine.

The species of this genus are distributed in the Paraná system, including the Paraguay River. Brochiloricaria  ZBK  is an abdomino-lip brooder. The species reproduce like those of Loricaria  ZBK  (Evers & Seidel 2005). Kavalco et al. (2005) made a cytogenetic analysis of four species of Loricariidae  and provided a synthesis of the karyotypic diversity of the family. These authors hypothesized that the diploid number of 2n = 54 chromosomes was a plesiomorphic character within Loricariidae  . This number was found in all characterized species and populations of Neoplecostominae  and Delturinae  , and in twelve of the fourteen characterized species of Hypoptopomatinae  . For this reason, they considered these three subfamilies basal. Considering Loricariinae  , they argued that according to the sampling and to the great observed diversity in diploid numbers(from 2n = 36 to 2n = 74), evolutionary trends were difficult to establish. Nevertheless, they underlined that a dozen of species possessed 2n = 54 ± 2 chromosomes as found in Hypoptopomatinae  , Neoplecostominae  and Delturinae  . Kavalco et al. (2005) gave karyotypic characteristics of B. macrodon  , with 2n = 58 chromosomes. Brochiloricaria  ZBK  is morphologicaly very similar to Loricaria  ZBK  and can be distinguished from the latter only by its teeth characteristics (teeth very long of equal size on both jaws versus premaxillary teeth almost two times longer than dentary ones). On the basis of molecular data and tooth shape of Hypostomus fonchii Montoya-Burgos et al.  ZBK  (2002) and Weber & Montoya-Burgos (2002) demonstrated that dentition is not always a reliable character to define a genus. The genus Cochliodon  ZBK  , placed in Hypostominae  , was erected on the basis of its spoon-shaped dentition; it is now considered as a junior synonym of Hypostomus  ZBK  . Consequently, Brochiloricaria  ZBK  may be a synonym of Loricaria  ZBK  , but complementary studies based on molecular data need to be conducted. Two valid species are assigned to the genus (Ferraris 2003).