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My what big eyes you have, Lyriocephalus!

Friday, January 12, 2018 11:26
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Looking like some sort of medieval fever dream,
meet Lyriocephalus, the hump-nosed lizard (Fig. 1), a cousin to Draco, the gliding lizard. Distinct from Draco, the body of this insectivore is laterally compressed, not laterally extended.

Figure 1. Lyriocephalus in vivo. ” data-medium-file=”https://pterosaurheresies.files.wordpress.com/2018/01/lyriocephalus-scutatus-invivo588.jpg?w=584&h=313?w=300″ data-large-file=”https://pterosaurheresies.files.wordpress.com/2018/01/lyriocephalus-scutatus-invivo588.jpg?w=584&h=313?w=584″ class=”size-full wp-image-29332″ src=”https://pterosaurheresies.files.wordpress.com/2018/01/lyriocephalus-scutatus-invivo588.jpg?w=584&h=313″ alt=”Figure 1. Lyriocephalus in vivo. ” width=”584″ height=”313″ srcset=”https://pterosaurheresies.files.wordpress.com/2018/01/lyriocephalus-scutatus-invivo588.jpg?w=584&h=313 584w, https://pterosaurheresies.files.wordpress.com/2018/01/lyriocephalus-scutatus-invivo588.jpg?w=150&h=80 150w, https://pterosaurheresies.files.wordpress.com/2018/01/lyriocephalus-scutatus-invivo588.jpg?w=300&h=161 300w, https://pterosaurheresies.files.wordpress.com/2018/01/lyriocephalus-scutatus-invivo588.jpg 588w” sizes=”(max-width: 584px) 100vw, 584px” />

Figure 1. Lyriocephalus in vivo.

Probably the largest eyes
relative to the skull of any tetrapod. Lyriocephalus, is an arboreal jungle lizard with an anterodorsal naris and a small antorbital fenestra. Note the arching postorbital contacting the prefrontal.

Figure 2. Lyriocephalus skull in several views. Note the arching of the postorbital to contact the prefrontal. ” data-medium-file=”https://pterosaurheresies.files.wordpress.com/2018/01/lyriocephalus_skull_x3color588.jpg?w=584&h=504?w=300″ data-large-file=”https://pterosaurheresies.files.wordpress.com/2018/01/lyriocephalus_skull_x3color588.jpg?w=584&h=504?w=584″ class=”size-full wp-image-29333″ src=”https://pterosaurheresies.files.wordpress.com/2018/01/lyriocephalus_skull_x3color588.jpg?w=584&h=504″ alt=”Figure 2. Lyriocephalus skull in several views. Note the arching of the postorbital to contact the prefrontal. ” width=”584″ height=”504″ srcset=”https://pterosaurheresies.files.wordpress.com/2018/01/lyriocephalus_skull_x3color588.jpg?w=584&h=504 584w, https://pterosaurheresies.files.wordpress.com/2018/01/lyriocephalus_skull_x3color588.jpg?w=150&h=129 150w, https://pterosaurheresies.files.wordpress.com/2018/01/lyriocephalus_skull_x3color588.jpg?w=300&h=259 300w, https://pterosaurheresies.files.wordpress.com/2018/01/lyriocephalus_skull_x3color588.jpg 588w” sizes=”(max-width: 584px) 100vw, 584px” />

Figure 2. Lyriocephalus skull in several views. Note the arching of the postorbital to contact the prefrontal. And did I mention that antorbital fenestra?

Lyriocephalus scutatus (Merrem 1820) is represented by a skeleton at Morphospace.org where you can rotate the skeleton on your monitor. Note the brevity of the tail of this agamid iguanid, There are more in vivo pix here. And a video here.

Figure 3. Lyriocephalus skeleton from Morphobank.org, where you can rotate digitized skeletons. ” data-medium-file=”https://pterosaurheresies.files.wordpress.com/2018/01/lyriocephalus_skeleton588.jpg?w=584&h=950?w=184″ data-large-file=”https://pterosaurheresies.files.wordpress.com/2018/01/lyriocephalus_skeleton588.jpg?w=584&h=950?w=584″ class=”size-full wp-image-29334″ src=”https://pterosaurheresies.files.wordpress.com/2018/01/lyriocephalus_skeleton588.jpg?w=584&h=950″ alt=”Figure 3. Lyriocephalus skeleton from Morphobank.org, where you can rotate digitized skeletons. ” width=”584″ height=”950″ srcset=”https://pterosaurheresies.files.wordpress.com/2018/01/lyriocephalus_skeleton588.jpg?w=584&h=950 584w, https://pterosaurheresies.files.wordpress.com/2018/01/lyriocephalus_skeleton588.jpg?w=92&h=150 92w, https://pterosaurheresies.files.wordpress.com/2018/01/lyriocephalus_skeleton588.jpg?w=184&h=300 184w, https://pterosaurheresies.files.wordpress.com/2018/01/lyriocephalus_skeleton588.jpg 588w” sizes=”(max-width: 584px) 100vw, 584px” />

Figure 3. Lyriocephalus skeleton from Morphobank.org, where you can rotate digitized skeletons.

References
Merrem B 1820. Versuch cines Systems Amphihien Tentamen Systcmatis Amphibiorum. Marburg, Krieger.

wiki/Draco
wiki/Lyriocephalus



Source: https://pterosaurheresies.wordpress.com/2018/01/13/my-what-big-eyes-you-have-lyriocephalus/

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