Poeciliopsis, Regan, 1913

Lucinda, Paulo Henrique Franco & Reis, Roberto E., 2005, Systematics of the subfamily Poeciliinae Bonaparte (Cyprinodontiformes: Poeciliidae), with an emphasis on the tribe Cnesterodontini Hubbs, Neotropical Ichthyology 3 (1), pp. 1-60 : 43

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https://doi.org/ 10.1590/S1679-62252005000100001

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Poeciliopsis + Phalloptychus

[Clade 105]

Diagnosis. Poeciliopsis and Phalloptychus share the following uniquely derived and unreversed features: (1) ventral process of anguloarticular short, not extending anterior to where anguloarticular overlaps dentary; [18-1**]; (2) gonapophysis of vertebra 14 very curved in adult males [52-1**]; and (3) branches of R6a and R6p completely fused [126-2**].

Additionally, this clade can be diagnosed by the following not uniquely derived and/or reversed features: (1) anterior tip of basipterygium in adult males clearly round and keeled [37- 3]; (2) presence of a lateral keel in basipterygium in adult males [38-1]; (3) first proximal radial of dorsal fin in adult males located between neural spines of 12 th and 13 th vertebrae [62-0]; and (4) adult females with first proximal radial of dorsal fin located between neural arches of 12 th and 13 th vertebrae [63-0].