Tomeurini Eigenmann, 1912

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 : 36-37

publication ID 10.1590/S1679-62252005000100001


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Tomeurini Eigenmann


Tribe Tomeurini Eigenmann

[Clade 63]

Tomeurini Eigenmann, 1912: 460 . Type-genus: Tomeurus Eigenmann, 1909 .

Diagnosis. Tomeurins can be diagnosed by the following uniquely derived features: (1) preopercular canal partially closed, only canals between pores 11-12, and 12-U closed (sometimes canal U-V also closed) [8-4*]; (2) three pelvicfin rays in females [44-2*]; (3) haemal arch and spine of vertebrae 13-17 in adult males absent [47-1*]; (4) first proximal radial of dorsal fin in adult males located between neural spines of 23 rd and 24 th or 24 th and 25 th vertebrae [62-3*]; (5) adult females with first proximal radial of dorsal fin located between neural arches of vertebrae 6; 23 and 24 or 24 and 25 [63-6*]; and (6) six dorsal-fin rays (males and females) [64-4*].

Additionally, tomeurins can be diagnosed by the following not uniquely derived and/or reversed features: (1) anterior margin of frontals extend anterior by between nasals [1- 0]; (2) parietals short restricted to the epiotic region, not reaching sphenotic anteriorly [2-1]; (3) absence of an epiotic process [3-3]; (4) posterior section of posterior remnant of infraorbital system opened into a groove [7-1]; (5) preorbital canal absent or opened, forming a very shallow groove [9-2]; (6) mandibular canal absent or opened, forming a very shallow groove [10-1]; (7) anterior process of anterior ceratohyal extending ventral to ventral hypohyal present [24-0]; (8) interarcual cartilage absent [25-1]; (9) three pelvic-fin rays in males [33-3]; (10) pelvic girdle of males located below pectoral girdle, posterior border of basipterygium anterior to posterior border of cleithrum [35-3]; (11) dorsolateral process of pelvic fin in adult males large [36-1]; (12) anterior tip of basipterygium in adult males clearly pointed [37-1]; (13) width of first pelvic-fin ray in adult males decreasing abruptly at distal portion, distal slender portion short [41-2]; (14) second pelvic-fin ray in adult males unbranched [42-1]; (15) distal portion of third and fourth gonactinosts separate, except by tip of gonactinost [74-2]; (16) eight anal-fin rays in males [85-3]; (17) dorsal expansion of ray 5p of anal fin in adult males present [124-1]; (18) R6a and R6p partially fused [126-1]; (19) more distal elements of R6 branches partially fused [127-1]; and (20) orbital bones absent [143-0].

Composition. Genus Tomeurus .

Distribution. As for Tomeurus .












Tomeurini Eigenmann

Lucinda, Paulo Henrique Franco & Reis, Roberto E. 2005


Eigenmann, C 1912: 460