Two ‘ugly’ fish find each other in the LRT
Ugly?
Well… they’re not pretty. They also look pugnacious. Their facial bones are overgrown (Figs 1–3) like a prize fighter who has seen too many fists.
Figure 1. ?Wadeichthys oxyops revised according to the Genyonemus Bauplan.
” data-medium-file=”https://pterosaurheresies.files.wordpress.com/2024/01/wadeichthys-insitu588.jpg?w=300″ data-large-file=”https://pterosaurheresies.files.wordpress.com/2024/01/wadeichthys-insitu588.jpg?w=584″ class=”wp-image-84398 size-full” src=”https://pterosaurheresies.files.wordpress.com/2024/01/wadeichthys-insitu588.jpg” alt=”Figure 1. ?Wadeichthys oxyops revised according to the Genyonemus Bauplan.” width=”588″ height=”247″ srcset=”https://pterosaurheresies.files.wordpress.com/2024/01/wadeichthys-insitu588.jpg 588w, https://pterosaurheresies.files.wordpress.com/2024/01/wadeichthys-insitu588.jpg?w=150&h=63 150w, https://pterosaurheresies.files.wordpress.com/2024/01/wadeichthys-insitu588.jpg?w=300&h=126 300w” sizes=”(max-width: 588px) 100vw, 588px” />
Figure 1. ?Wadeichthys oxyops revised according to the Genyonemus Bauplan. Museum # to come.
A specimen referred to Wadeichthys
(but distinct from and nesting apart from the holotype in the LRT) has been difficult to understand. Could be I did not want to look at it.
?Wadeichthys oxyops
(Waldman 1971; image from Long 1995 p150; 12cm long; Early Cretaceous, Koonwara Fm, Australia, museum # to come) This taxon is related to the extant white croaker, Genyonemus (Fig 3), and the piranha, Serrasalmus, all members of the herring (Clupea) family.
Figure 1. The face of ?Wadeichthys oxyops.
” data-medium-file=”https://pterosaurheresies.files.wordpress.com/2024/01/wadeichthys-face-insitu588.jpg?w=285″ data-large-file=”https://pterosaurheresies.files.wordpress.com/2024/01/wadeichthys-face-insitu588.jpg?w=584″ class=”wp-image-84399 size-full” src=”https://pterosaurheresies.files.wordpress.com/2024/01/wadeichthys-face-insitu588.jpg” alt=”Figure 1. The face of ?Wadeichthys oxyops.” width=”588″ height=”620″ srcset=”https://pterosaurheresies.files.wordpress.com/2024/01/wadeichthys-face-insitu588.jpg 588w, https://pterosaurheresies.files.wordpress.com/2024/01/wadeichthys-face-insitu588.jpg?w=142&h=150 142w, https://pterosaurheresies.files.wordpress.com/2024/01/wadeichthys-face-insitu588.jpg?w=285&h=300 285w” sizes=”(max-width: 588px) 100vw, 588px” />
Figure 2. The face of ?Wadeichthys oxyops.
Similarly, Genyonemus,
the more familiar extant white croaker, an extant marine bony fish, has bounced like a red-headed stepchild from node to node without making a close match, until now. Now they both nest with the most pugnacious fish of their size, Serrasalmus, the piranha, and a deep sea cousin, the fangtooth, Anoplogaster, a fish that probably takes the prize.
Figure 3. The extant white croaker, Genyonemus.
” data-medium-file=”https://pterosaurheresies.files.wordpress.com/2024/01/genyonemus-lineatus-white-croaker588.jpg?w=255″ data-large-file=”https://pterosaurheresies.files.wordpress.com/2024/01/genyonemus-lineatus-white-croaker588.jpg?w=584″ class=”wp-image-84401 size-full” src=”https://pterosaurheresies.files.wordpress.com/2024/01/genyonemus-lineatus-white-croaker588.jpg” alt=”Figure 3. The extant white croaker, Genyonemus. ” width=”588″ height=”693″ srcset=”https://pterosaurheresies.files.wordpress.com/2024/01/genyonemus-lineatus-white-croaker588.jpg 588w, https://pterosaurheresies.files.wordpress.com/2024/01/genyonemus-lineatus-white-croaker588.jpg?w=127&h=150 127w, https://pterosaurheresies.files.wordpress.com/2024/01/genyonemus-lineatus-white-croaker588.jpg?w=255&h=300 255w” sizes=”(max-width: 588px) 100vw, 588px” />
Figure 3. The extant white croaker, Genyonemus. Note the greatly expanded lacrimal (tan).
Genyonemus lineatus
originally Leiostomus lineatus Ayers 1855, up to 15cm) is the extant white croaker, a schooling marine fish of the shallow waters of the Eastern Pacific. Traditionally it is related to the Moorish Idol, Zanclus. Here it shares more traits with Early Cretaceous Wadeichthys. Note the bars reinforcing the lacrimal (tan), postorbital (amber) and preoperculum (light yellow). This fish has a face like a catcher’s mask.
References
Ayers WO 1855. Description of new fishes from California.]. (Minutes of Academy meetings were printed in “The Pacific” (a newspaper) shortly after each meeting. New species date to publication in The Pacific. Dates of publication are given in each species account). The Pacific [newspaper]. v. 4 (nos 7-22). [Also appeared in Proc. Calif. Acad. Nat. Sci. v. 1.]
Waldman M 1971. Fish from the freshwater Lower Cretaceous of Victoria, Australia, with comments on the palaeo-environment. Special Papers in Palaeontology No. 9. The Palaeontological Association, London. 1–124, 18 plates.
wiki/Genyonemus – white croaker
wiki/Wadeichthys
Source: https://pterosaurheresies.wordpress.com/2024/02/20/two-ugly-fish-find-each-other-in-the-lrt/
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