Tested lungfish in the LRT

The systematic and scoring problem with lungfish is
their tendency to split (= tessellate) their cranial bones. That makes identification more difficult. Not impossible, just more difficult.

There is also the issue of the naris,
which does not show a migration to the ventral rim – unless lungfish developed a dual system during the transition from having lateral nares to ventral nares. Related clades document a ventral migration of the in-cuirrent and ex-current nares.

Here are the tested lungfish
(clade Dipnoi) in the LRT and their phylogenetic order (Fig 1).

Figure 1. Dipnoi = lungfish taxa tested by the LRT. Here Grossius is a basal lungfish, perhaps a last common ancestor. ” data-image-caption=”

Figure 1. Dipnoi = lungfish taxa tested by the LRT. Here Grossius is a basal lungfish, perhaps a last common ancestor.

” data-medium-file=”https://pterosaurheresies.files.wordpress.com/2024/04/lungfish-dipnoi-evolution.jpg?w=94″ data-large-file=”https://pterosaurheresies.files.wordpress.com/2024/04/lungfish-dipnoi-evolution.jpg?w=322″ class=”size-full wp-image-85194″ src=”https://pterosaurheresies.files.wordpress.com/2024/04/lungfish-dipnoi-evolution.jpg?w=584&h=1859″ alt=”Figure 1. Dipnoi = lungfish taxa tested by the LRT. Here Grossius is a basal lungfish, perhaps a last common ancestor.” width=”584″ height=”1859″ srcset=”https://pterosaurheresies.files.wordpress.com/2024/04/lungfish-dipnoi-evolution.jpg?w=584&h=1859 584w, https://pterosaurheresies.files.wordpress.com/2024/04/lungfish-dipnoi-evolution.jpg?w=47&h=150 47w, https://pterosaurheresies.files.wordpress.com/2024/04/lungfish-dipnoi-evolution.jpg?w=94&h=300 94w, https://pterosaurheresies.files.wordpress.com/2024/04/lungfish-dipnoi-evolution.jpg 588w” sizes=”(max-width: 584px) 100vw, 584px” />

Figure 1. Dipnoi = lungfish taxa tested by the LRT. Here Devonian Grossius is a basal lungfish, perhaps a last common ancestor. Note the presence of the nares in some taxa and the lack of a nares in others.

New DGS identities for several skull bones
are applied to some of the above taxa (Fig 1) based on comparative anatomy. These colors are subject to further updates, of course. Data arrives from several sources, from µCT scans to pen and ink diagrams. Grossius (Fig 1) is from the Devonian.

References
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Long JA 1992. Cranial anatomy of two new Late Devonian lungfishes (Pisces: Dipnoi) from Mount Howitt, Victoria. Records of the Australian Museum 44:299-318.
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Thomson KS and Campbell KSW 1971. The Structure and Relationships of the Primitive Devonian Lungfish, Dipnorhynchus sussmilchi (Etheridge). Bulletin of the Peabody Museum of Natural History. (38):109pp.
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wiki/Lungfish

wiki/Polypterus
wiki/Reedfish
wiki/Howidipterus
wiki/Dipnorhynchus
wiki/Dipterus
wiki/Spotted_lungfish-Protopterus
wiki/Neoceratodus