Gobius sp.
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publication ID |
https://doi.org/10.26879/1429 |
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publication LSID |
lsid:zoobank.org:pub:BD629D9B-2B92-4044-B371-4363A90CEF65 |
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persistent identifier |
https://treatment.plazi.org/id/03D287C3-EE34-FFA3-30BA-FE86719DC6F3 |
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treatment provided by |
Felipe |
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scientific name |
Gobius sp. |
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Figure 3 View FIGURE 3 K-L
Material. 2 otoliths, NMNHU-P PI 2638, Staryi Zavod.
Discussion. Two small, compressed otoliths with a ratio OL:OH just below 1.0 and about 1.0 mm in length are interpreted to represent a further, unidentified Gobius species. The compressed shape is atypical for Gobius otoliths but is occasionally seen in juvenile Gobius otoliths and certain species such as the extant G. vittatus Vinciguerra, 1883 (see Gut et al., 2020; Schwarzhans et al., 2020b for figures of otoliths). Similarly, compressed otoliths are found in representatives of the genus Lesueurigobius , which differ, however, in the large subcaudal iugum, as well as in Proterorhinus showing a morphologically more reduced sulcus.
BENTHOPHILUS Lineage (BENTHOPHILINI in Agorreta et al., 2013)
Genus SCYTHOGOBIUS Schwarzhans and Bratishko, 2023 in Schwarzhans et al., 2023
Scythogobius minimus n. sp.
Figure 3 View FIGURE 3 U-AF zoobank.org/ 89A6D401-C8E0-4167-A8AB-D40DAD2B87DC
Holotype. NMNHU-P PI 2645 ( Figure 3 View FIGURE 3 X-Z), Novyi Pliazh , western Ukraine, late Badenian.
Paratypes. 1 otolith, SMF PO 101.346 , Novyi Pliazh ; 2 specimens, SMF PO 101.347 , Lisohirka .
Additional material. 3 otoliths: NMNHU-P PI 2646, 1 specimen, Mlyntsi; 2 specimens, NMNHUP PI 2647 , Lisohirka.
Etymology. From minimus (Latin) = small, referring to the small size of the otoliths.
Diagnosis. Compact, roundish to oval shape; flat inner face and strongly convex, smooth outer face. Sulcus small, narrow, inclined at 18–28° and slightly forward positioned, deepened, simple fusiform shaped and without subcaudal iugum. OL:SuL = 2.2–2.5.
Description. Small, thick, roundish to oval otoliths with sizes up to 1.25 mm in length (holotype). OL:OH = 1.2 in specimens> 1 mm in length ( Figure 3 View FIGURE 3 U-Z) and 0.9–1.0 in specimens <0.7 mm in length ( Figure 3 View FIGURE 3 AA-AF) showing a distinctive allometric ontogeny; OH:OT = 1.6–2.0. Otolith rims are well rounded without prominent angles and smooth; dorsal and anterior rims are regularly rounded, the ventral rim with a relatively low curvature and the posterior rim inclined with somewhat projecting tip at joint of posterior and ventral rims. The inner face is nearly completely flat, smooth, with a small, slightly forward positioned, a simple fusiform, deepened sulcus without the subcaudal iugum. OL:SuL = 2.2–2.5; 18–28° inclination. There is no discernible dorsal depression or ventral furrow. The outer face is strongly convex and smooth.
Discussion. The otoliths of Scythogobius are highly characteristic because of their morphologically reduced otolith and sulcus shapes and the flat inner and strongly convex outer face resulting in a comparatively thick otolith. The genus Scythogobius was established based on S. spissus Schwarzhans and Bratishko, 2023 (Schwarzhans et al., 2023) from the late Bessarabian of the Crimea ( Ukraine). Scythogobius minimus differs from S. spissus in the lower index OL:OH at all sizes (0.9– 1.2 vs. 1.25–1.4) and the smaller sulcus size (OL:SuL = 2.2–2.5 vs. 1.75–2.15).
| PI |
Paleontological Institute |
| SMF |
Forschungsinstitut und Natur-Museum Senckenberg |
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