The wolf herring (Chirocentrus) enters the LRT

Easy one today.
Those big teeth on a long, lean, silvery body, should be a dead-giveaway where the wolf herring, Chirocentrus (Fig. 1) nests. Scroll down when ready.

Figure 1. The wolf herring (Chirocentrus) enters the LRT.

Figure 1. The wolf herring (Chirocentrus) enters the LRT.

The wolf herring nests with
the viperfish (Chauliodus, Figs. 2, 3) in the large reptile tree (LRT, 1644+ taxa; subset Fig. 4).

Figure 3. Chauliodus, the viperfish, in vivo.

Figure 3. Chauliodus, the viperfish, in vivo.

Earlier the viperfish entered
the LRT alongside the extant lizardfish (Trachinocephalus) and salamander fish (Lepidogalaxias) taxa. Surprisingly, these are basal bony fish taxa just following the first dichotomy that splits most ray fin bony fish from most other ray fin bony fish. That second line, the one that includes viperfish and wolf herring, ultimately developed lobe fins and later, four limbs.

Figure 2. Chauliodus, the viperfish, skull. Compared to the wolf herring in figure 1.

Figure 2. Chauliodus, the viperfish, skull. Compared to the wolf herring in figure 1.

Chirocentrus dorab (Cuvier 1816; up to 60cm) is the extant wolf herring, an open seas sister to the deepsea viperfish (Chauliodus), which develops an anterior dorsal fin and larger teeth.

Figure x. Subset of the LRT, focusing on fish for July 2020.

Figure x. Subset of the LRT, focusing on fish for July 2020.

References
Cuvier G 1816.  Le règne animal distribué d’après son organisation, pour servir de base à l’histoire naturelle des animaux et d’introduction à l’anatomie comparée. Les reptiles, les poissons, les mollusques et les annélides. Déterville, Paris. Vol. 2, Edition 1: i-xviii, 1-532, (pls. 9-10, in v. 4).

wiki/Chirocentrus

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