Pogonopoma
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Pogonopoma obscurum |
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Pogonopomoides |
Pogonopoma is a genus of South American catfish (order Siluriformes) of the family Loricariidae. It includes three species, P. obscurum, P. parahybae, and P. wertheimeri.[1]
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[edit] Taxonomy
Pogonopoma is one of three genera currently valid in the tribe Rhinelepini. Pogonopomoides, previously a valid genus, was placed in synonymy with Pogonopoma.[2] This genus and Rhinelepis have a sister group relationship.[2]
Pogonopoma contains three species: P. wertheimeri (type species), P. parahybae (previously Pogonopomoides), and P. obscurum (described in 2002).[2]
[edit] Distribution and habitat
P. wertheimeri originates from the Mucuri River, São Mateus River, and Doce River. This species is usually found in stretches of river with mid to strong water current and bottom formed by rocks or sand. However, they are also found in the Juparanã lagoon, close to the mouth of the Doce river, which is a lentic habitat.[2]
P. parahybae is endemic to the Paraíba do Sul river basin, where it occurs in areas of mid to strong water current usually associated with rocky substrate.[2]
P obscurum is endemic to the upper reaches of the Uruguay River, in the states of Rio Grande do Sul and Santa Catarina, southern Brazil. This species is fairly common and inhabits stretches of the main river and its tributaries, with relatively rapid water currents over bottoms usually formed by rocks and boulders.[2]
[edit] Appearance and anatomy
As loricariids, Pogonopoma species all exhibit a suckermouth and an at least slightly flattened ventral surface. However, unlike many loricariids, they have circular pupils, which differs from most members of the family that have an omega iris. Pogonopoma species are heavily armored except on their abdomen (the belly in the case of loricariids), which is relatively unplated.[3][2]
P. wertheimeri reaches a length of about 22 centimetres (8.7 in) SL.[4] It is a cylindrically shaped loricariid. The cheek is covered in long, thin, non-evertible odontodes that form a dense patch.[3]
P. parahybae reaches a length of about 26 cm (10 in) SL.[5] This fish appears to be more of an intermediate between P. wertheimeri and Rhinelepis. It is fairly flattened, and also has longer pectoral and pelvic fins compared to other species of the tribe Rhinelepini. The gill openings are not as large as those in Rhinelepis. Also, this species lacks long cheek odontodes and the adipose fin.[3]
P. obscurum reaches a length of about 25 cm SL (10 in) SL.[6] Unlike P. wertheimeri, it simultaneously lacks an adipose fin and cheek odontodes. It's dorsal fin base is also longer than of other members of this genus.[2]
[edit] External links
- Armbruster, Jonathan W.. Pogonopoma Regan 1904. (contains excerpts from cited papers)
[edit] References
- ^ Ferraris, Carl J., Jr. (2007). "Checklist of catfishes, recent and fossil (Osteichthyes: Siluriformes), and catalogue of siluriform primary types" (PDF). Zootaxa 1418: 1–628.
- ^ a b c d e f g h Quevedo, Rodrigo; Reis, Roberto E. (2002). "Pogonopoma obscurum: A New Species of Loricariid Catfish (Siluriformes: Loricariidae) from Southern Brazil, with Comments on the Genus Pogonopoma" (PDF). Copeia 2002 (2): 402–410. doi:.
- ^ a b c Armbruster, Jonathan W. (1998). "Phylogenetic Relationships of the Suckermouth Armored Catfishes of the Rhinelepis Group (Loricariidae: Hypostominae)". Copeia 1998 (3): 620–636. doi:.
- ^ "Pogonopoma wertheimeri". FishBase. Ed. Ranier Froese and Daniel Pauly. May 2007 version. N.p.: FishBase, 2007.
- ^ "Pogonopoma parahybae". FishBase. Ed. Ranier Froese and Daniel Pauly. May 2007 version. N.p.: FishBase, 2007.
- ^ "Pogonopoma obscurum". FishBase. Ed. Ranier Froese and Daniel Pauly. May 2007 version. N.p.: FishBase, 2007.
