Two new Parananochromis species

New cichlid species and taxonomy
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Rico Morgenstern
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Two new Parananochromis species

Post by Rico Morgenstern » Mon Sep 22, 2014 11:59 am

Lamboj, A. (2014): Two new species of Parananochromis from Cameroon, Central Africa (Teleostei: Cichlidae)

Ichthyological Exploration of Freshwaters v. 25 (no. 1): 49-57

Abstract: http://www.pfeil-verlag.de/04biol/pdf/ief25_1_04.pdf

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Philippe Burnel
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Re: Two new Parananochromis species

Post by Philippe Burnel » Mon Sep 22, 2014 12:24 pm

If anybody is able to get the complete pdf file....

Philippe

Rico Morgenstern
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Re: Two new Parananochromis species

Post by Rico Morgenstern » Tue Oct 14, 2014 2:38 pm

This is an interesting work. Parananochromis elobatus (formerly called P. sp. 'Sanaga' although its presence in the Sanaga drainage is doubtful; see p. 53 of the present paper) is certainly a valid species well differentiated from the most similar species, P. brevirostris. At the first glance, this applies also to P. orsorum, since it is said to differ from its closest relative, P. gabonicus in a several character states, i.e. fewer tooth series in the jaws, males with vertical rows of pale blue spots in caudal and soft parts of anal and dorsal fin, distal part of anal fin yellow in both sexes and a black tip of the pelvic fin in females. Unfortunately, however, the author has disregarded the original description of P. gabonicus (Trewavas, 1975). It is based on a single female specimen (collected 18 years before description), the life colors of which are not reporded. Thus, two of the characters said to seperate P. orsorum from this species (fin ornamentation of males and anal fin coloration) cannot be checked on the holotype. According to Trewavas (1975), the specimen has two series of teeth in the upper and two to three (possibly to be read as two plus an incomplete one) in the lower jaw, i.e. a condition somewhat inbetween the the states recorded for both species by Lamboj (2014). Above all however, the holotype has (or at least had when Trewavas examined it) the black spot at the tip of the pelvic fin allegedly lacking in this species. It is shown in the figure and mentioned thrice (!) in the original description to emphasize its special diagnostic value:

http://www.biodiversitylibrary.org/page ... 3/mode/1up

Therefore, it is doubtful if the species currently referred to as P. gabonicus, which lacks the diagnostic black tip of the pelvic fin, is correctly determined. As long as P. gabonicus is not properly identified and delimitated (unfortunately, this task is complicated by the somewhat imprecise type locality), any description of a similar species must be regarded as premature.

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