Tomeurini Eigenmann 1912
Creators: name: Lucinda, Paulo Henrique Franco
name: Reis, Roberto E.
Publisher: name: Zenodo
Year: 2005
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Actinopterygii
Cyprinodontiformes
Poeciliidae

description: Tribe Tomeurini Eigenmann [Clade 63] Tomeurini Eigenmann, 1912: 460. Type-genus: <i>Tomeurus</i> Eigenmann, 1909. <b>Diagnosis.</b> 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]. <b>Composition.</b> Genus <i>Tomeurus</i>. <b>Distribution.</b> As for <i>Tomeurus</i>.
description: Published as part of <i>Lucinda, Paulo Henrique Franco &amp; Reis, Roberto E., 2005, Systematics of the subfamily Poeciliinae Bonaparte (Cyprinodontiformes: Poeciliidae), with an emphasis on the tribe Cnesterodontini Hubbs, pp. 1-60 in Neotropical Ichthyology 3 (1)</i> on pages 36-37, DOI: 10.1590/S1679-62252005000100001, http://zenodo.org/record/5417369
description: {"references": ["Eigenmann, C. H. 1912 The freshwater fishes of British Guiana, including a study of the ecological grouping of species, and the relation of the fauna of the plateau to that of the lowlands. Memoirs of the Carnegie Museum, 5 (1): i-xxii + 1 - 578 p, pls. 1 - 103.", "Eigenmann, C. H. 1909. Reports on the expedition to British Guyana of the Indiana University and the Carnegie Museum, 1908. Report no. 1. Some new genera and species of fishes from British Guyana. Annals of the Carnegie Museum, 6 (1): 4 - 54."]}