Phreatobius Goeldi

Luis Fernandez, Lisandro J. Saucedo, Fernando M. Carvajal-Vallejos & Scott A. Schaefer, 2007, A new phreatic catfish of the genus Phreatobius Goeldi 1905 from groundwaters of the Itenez River, Bolivia (Siluriformes: Heptapteridae)., Zootaxa 1626, pp. 51-58 : 52

publication ID

z01626p051

publication LSID

lsid:zoobank.org:pub:1B412322-3313-4190-A893-8595D6CECE31

DOI

https://doi.org/10.5281/zenodo.6248695

persistent identifier

https://treatment.plazi.org/id/3071CD59-16B8-3503-6534-031EED36D0AB

treatment provided by

Thomas

scientific name

Phreatobius Goeldi
status

 

[[ Phreatobius Goeldi View in CoL View at ENA   ZBK ]]

Phreatobius cisternarum   ZBK described by Goeldi (1905) is known only from relatively shallow wells at several localities near the mouth of the Amazon River (Carvalho 1967; de Pinna 1998; Muriel-Cuna & de Pinna 2005; Fig. 1). de Pinna (1998) mentioned the existence of two additional quite distinctive species, as yet undescribed, from the Río Negro of Brazil. Since its original description, Phreatobius   ZBK remains monotypic and has been aligned with five different siluriform families (de Pinna 1998): Trichomycteridae, Cetopsidae, Clariidae, Plotosidae, and Pimelodidae (Heptapteridae). In the most recent treatment of species-level diversity of neotropical fishes, Phreatobius   ZBK was assigned to the Heptapteridae (Bockmann & Guazzelli 2003). However, Muriel-Cunha and de Pinna (2005) and Ferraris (2007) suggest that the family-level placement of this genus and its single named species is unsettled. Superficial resemblance of Phreatobius   ZBK to the African Clariidae and the exclusively marine Plotosidae is suggested by the elongate body and slender head, as well as by the rostrally extended caudal fin, continuous ventrally with the anal fin and reminiscent of the continuous fin configurations found in members of those families. A recent comprehensive synopsis of P. cisternarum   ZBK was provided by Muriel-Cuna and de Pinna (2005), including observations on color, behavior, and feeding of eight living specimens held in captivity.

In this study, we report the first specimens of Phreatobius   ZBK from Bolivia, which we recognize as a new species based on several unique features, most notable among them the absence of eyes. Specimens of Phreatobius sanguijuela n. sp. were collected from artificial wells that provide drinking water to the local community in the vicinity of Porvenir, northern Santa Cruz Department, within the Río Paraguá drainage basin. This species is endangered by environmental degradation due to pollution, water extraction for drinking and irrigation, mineral extraction, and associated erosion. The new species extends the geographical distribution of Phreatobius   ZBK 2000 km to the west (Fig. 1), suggesting that members of the genus are likely to be much more widespread than previously recognized.

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