Bollmannia gatunensis Schubert, 1908

Schwarzhans, Werner W. & Aguilera, Orangel A., 2024, Otoliths of the Gobiidae from the Neogene of tropical America, Swiss Journal of Palaeontology (13) 143 (1), pp. 1-129 : 32-33

publication ID	https://doi.org/10.1186/s13358-023-00302-5
persistent identifier	https://treatment.plazi.org/id/492D87AA-FFB4-FFC5-0236-FDB062E1FEF8
treatment provided by	Felipe
scientific name	Bollmannia gatunensis Schubert, 1908
status

Treatment

Figure 18a–n View Fig

1908 Otolithus (Gobius) gatunensis —Schubert: Fig. 7 View Fig .

1908 Otolithus (Gobius) vicinalis Koken, 1891 —Schubert: Fig. 6 View Fig .

1976 Gobiidae View in CoL —Nolf: pl. 9, Fig. 7 View Fig .

Material 188 specimens, Tortonian : 2 specimens Trinidad, Tamana FM, KR 25956 ( NMB P541 View Materials and P511) ; 15 specimens Ecuador, Angostura FM , 3 specimens PPP 3290 , 2 specimens PPP 3297 ( NMB P15511 View Materials ) , 5 specimens PPP 3301 ( NMB P15512 View Materials ) , 2 specimens PPP 3369 , 1 specimen PPP 3372 , 2 specimens PPP 3465 ; 54 specimens Pacific Panama, Darien, Tuira FM , 7 specimens PPP 1132 (figured specimen NMB P15522 View Materials ) , 14 specimens PPP 1137 , 1 specimen PPP 1139 ( NMB P15520 View Materials ) , 4 specimens, PPP 1593 , 2 specimens 1142, 4 specimens PPP 1627 , 21 specimens PPP 1163 , 1 specimen PPP 1164 ; 57 specimens Pacific Panama, Darien, Yaviza FM , 5 specimens PPP 1607 , 5 specimens PPP 1609 , 3 specimens PPP 1528 , 3 specimens PPP 1145 , 12 specimens PPP 1620 , 6 specimens PPP 1149 (figured specimen NMB P15521 View Materials ) , 9 specimens PPP 1171 , 1 specimen PPP 1565 , 13 specimens PPP 1566 (figured specimen NMB P15519 View Materials ) ; 47 specimens Atlantic Panama, Gatun FM , 1 specimen PPP 1973 , 5 specimens PPP 2165 ( NMB P15514 View Materials ) , 1 specimens PPP 2166 ( NMB P15513 View Materials ) , 28 specimens PPP 2167 (figured specimens NMB P15515-16 View Materials ) , 12 specimens PPP 2168 (figured specimen NMB P15517 View Materials ) . 13 specimens Messinian: Chucunaque FM , Pacific Panama, Darien, PPP 1612 (figured specimen NMB P15518 View Materials ) ,

Description Otolith size up to 3.1 mm in length. OL:OH = 1.02–1.12; OH:OT = 3.1–3.4. Predorsal angle relatively high, postdorsal angle expanded, postdorsal projection rounded, projecting beyond postventral angle, slightly bent outward. Ventral rim straight, horizontal. Anterior rim nearly vertical, with nearly orthogonal preventral angle; posterior rim slightly inclined, with broad and rather deep indentation at its middle. Ventral rim smooth, dorsal rim irregularly undulating or crenulated.

Inner face flat in vertical direction and slightly bent in horizontal direction. Sulcus sole-shaped with moderate ostial lobe, moderately deepened, inclined at 10–15°. Caudal tip rounded, slightly bent upward. OL:SuL = 1.65– 1.85. Subcaudal iugum long, moderately wide. Dorsal depression wide, distinct and close to sulcus with distinct crista superior. Ventral furrow distinct, relatively distant from ventral rim of otolith. Outer face moderately to distinctly convex, strongest inframedian, with radial furrows on dorsal field.

Discussion Bollmannia gatunensis is a common species during the Tortonian from Ecuador in the East Pacific to Trinidad in the West Atlantic. Bollmannia gatunensis is very similar to B. communis but tends to be thinner (OH:OT = 3.1–3.4 vs 2.75–3.0) and shows a more strongly ornamented dorsal rim and more distinct postdorsal projection. No doubt, both species are closely related.