Ariopsis

Marceniuk, Alexandre P., Acero, Arturo, Cooke, Richard & Betancur-R, Ricardo, 2017, Taxonomic revision of the New World genus Ariopsis Gill (Siluriformes: Ariidae), with description of two new species, Zootaxa 4290 (1), pp. 1-42: 39

publication ID

https://doi.org/10.11646/zootaxa.4290.1.1

publication LSID

lsid:zoobank.org:pub:25836DE9-00C1-43FB-9742-2E427FD5C8A0

persistent identifier

http://treatment.plazi.org/id/03992C13-FF9F-FFC8-A1E1-FD3A1AC4FA79

treatment provided by

Plazi

scientific name

Ariopsis
status

 

Key to the species of Ariopsis 

1a. Osseous medial groove of neurocranium absent ( Fig. 3View FIGURE 3 a, c)....................................................2

1b. Osseous medial groove of neurocranium present ( Figs. 3View FIGURE 3 b, d, e, f)...............................................4

2a. Mesethmoid median portion wide ( Fig. 1View FIGURE 1 a), medial notch of mesethmoid large and shallow ( Fig. 3View FIGURE 3 a)..................................................................................... A. guatemalensis  (Mexico to Costa Rica, EP)

2b. Mesethmoid median portion narrow ( Figs. 3View FIGURE 3 b –e), medial notch of mesethmoid narrow and deep ( Figs. 3View FIGURE 3 b –e).............3

3a. Total number of gill rakers on the first plus the second gill arches 31–36, rarely 37.................................................................................. A. assimilis  (Quintana Roo, Mexico to Honduras in the Caribbean) 

3b. Total number of gill rakers on the first plus the second gill arches 38–44, rarely 36 or 37... A. canteri  (Colombia, Caribbean)

4a. Total number of gill rakers on the first plus the second gill arches 40–42....................... A. gilberti  (Mexico, EP)

4b. Total number of gill rakers on the first plus the second gill arches 28–37.......................................... 5

5a. Fleshy medial groove of neurocranium conspicuous and very long, always surpassing the posterior margin of eyes ( Fig. 4View FIGURE 4); pterotic lateral margin smoothly convex ( Fig. 3View FIGURE 3).............................................................6

5b. Fleshy medial groove of neurocranium conspicuous or inconspicuous, but never surpassing posterior margin of eyes ( Fig. 4View FIGURE 4); pterotic lateral margin markedly convex, sometimes angled ( Fig. 3View FIGURE 3).............................................7

6a. 13–15 gill rakers on the first gill arch, rarely 16; fenestra delimited by mesethmoid and lateral ethmoid conspicuous ( Fig. 3View FIGURE 3); external posterior branch of lateral ethmoid columnar and thin ( Fig. 3View FIGURE 3)................................................................................................ A. felis  (Massachusetts, US, to Yucatán, Mexican Caribbean) 

6b. 15–17 gill rakers on the first gill arch; fenestra delimited by mesethmoid and lateral ethmoid inconspicuous ( Fig. 3View FIGURE 3); external posterior branch of lateral ethmoid depressed and thick ( Fig. 3View FIGURE 3)....... A. jimenezi  (Archipiélago de las Perlas, Panama, EP)

7a. Lateral margin of sphenotic notched, narrower medially than anteriorly ( Figs. 3View FIGURE 3 and 19View FIGURE 19)................................................................................................... A. seemanni  (El Salvador to Panama, EP)

7b. Lateral margin of sphenotic straight, as wide medially as anteriorly ( Figs. 3View FIGURE 3 and 21View FIGURE 21)...... A. simonsi  (Colombia to Peru, EP)