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The bushbaby (genus: Galago), a tarsier-mimic

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Figure 1. Galago skeleton. Note the elongate tarsals and large orbits, both convergent with Tarsius. ” data-medium-file=”https://pterosaurheresies.files.wordpress.com/2019/01/galago_senegalensis_skeleton588.jpg?w=584&h=459?w=300″ data-large-file=”https://pterosaurheresies.files.wordpress.com/2019/01/galago_senegalensis_skeleton588.jpg?w=584&h=459?w=584″ class=”size-full wp-image-35102″ src=”https://pterosaurheresies.files.wordpress.com/2019/01/galago_senegalensis_skeleton588.jpg?w=584&h=459″ alt=”Figure 1. Galago skeleton. Note the elongate tarsals and large orbits, both convergent with Tarsius. ” width=”584″ height=”459″ srcset=”https://pterosaurheresies.files.wordpress.com/2019/01/galago_senegalensis_skeleton588.jpg?w=584&h=459 584w, https://pterosaurheresies.files.wordpress.com/2019/01/galago_senegalensis_skeleton588.jpg?w=150&h=118 150w, https://pterosaurheresies.files.wordpress.com/2019/01/galago_senegalensis_skeleton588.jpg?w=300&h=236 300w, https://pterosaurheresies.files.wordpress.com/2019/01/galago_senegalensis_skeleton588.jpg 588w” sizes=”(max-width: 584px) 100vw, 584px” />

Figure 1. Galago skeleton. Note the elongate tarsals and large orbits, both convergent with Tarsius (Fig. 5).

The Senegal bushbaby,
Galago senegalensis (Figs. 1, 2) is a small primate in the Lemur lineage, most closely related to Perodicticus potto (Fig. 3) in the large reptile tree (LRT, 1373 taxa), despite sharing a long tail, elongate tarsals and large orbits with the tarsier, Tarsius (Fig. 5). These relationships follow traditional cladograms.

Figure 2. Galago skull in three views. ” data-medium-file=”https://pterosaurheresies.files.wordpress.com/2019/01/galago-demidoff-skull588.jpg?w=584&h=762?w=230″ data-large-file=”https://pterosaurheresies.files.wordpress.com/2019/01/galago-demidoff-skull588.jpg?w=584&h=762?w=584″ class=”size-full wp-image-35103″ src=”https://pterosaurheresies.files.wordpress.com/2019/01/galago-demidoff-skull588.jpg?w=584&h=762″ alt=”Figure 2. Galago skull in three views. ” width=”584″ height=”762″ srcset=”https://pterosaurheresies.files.wordpress.com/2019/01/galago-demidoff-skull588.jpg?w=584&h=762 584w, https://pterosaurheresies.files.wordpress.com/2019/01/galago-demidoff-skull588.jpg?w=115&h=150 115w, https://pterosaurheresies.files.wordpress.com/2019/01/galago-demidoff-skull588.jpg?w=230&h=300 230w, https://pterosaurheresies.files.wordpress.com/2019/01/galago-demidoff-skull588.jpg 588w” sizes=”(max-width: 584px) 100vw, 584px” />

Figure 2. Galago skull in three views.

Galago senegalensis (É. Geoffroy, 1796) is the Senegal bushbaby, a small nocturnal lemur close to Lemur catta and the potto, Perodicticus. Convergent to Tarsius, the proximal tarsals are elongated. The anterior upper incisors are missing. The medial incisors are appressed to the canines.

Figure 4. Perodicticus potto, the extant potto, has a typical lemur dentition, lacking giant incisors. ” data-medium-file=”https://pterosaurheresies.files.wordpress.com/2019/01/perodicticus_potto_588.jpg?w=584&h=465?w=300″ data-large-file=”https://pterosaurheresies.files.wordpress.com/2019/01/perodicticus_potto_588.jpg?w=584&h=465?w=584″ class=”size-full wp-image-35093″ src=”https://pterosaurheresies.files.wordpress.com/2019/01/perodicticus_potto_588.jpg?w=584&h=465″ alt=”Figure 4. Perodicticus potto, the extant potto, has a typical lemur dentition, lacking giant incisors.” width=”584″ height=”465″ srcset=”https://pterosaurheresies.files.wordpress.com/2019/01/perodicticus_potto_588.jpg?w=584&h=465 584w, https://pterosaurheresies.files.wordpress.com/2019/01/perodicticus_potto_588.jpg?w=150&h=119 150w, https://pterosaurheresies.files.wordpress.com/2019/01/perodicticus_potto_588.jpg?w=300&h=239 300w, https://pterosaurheresies.files.wordpress.com/2019/01/perodicticus_potto_588.jpg 588w” sizes=”(max-width: 584px) 100vw, 584px” />

Figure 4. Perodicticus potto, the extant potto, has a typical lemur dentition, lacking giant incisors.

Some skulls attributed to Galago
have 4 molars rather than the 3 shown here (Fig. 2).

Figure 2. Tarsius, the extant tarsier. Note the several autapomorphies displayed here vs. the many plesiamorphies in Darwinius. ” data-medium-file=”https://pterosaurheresies.files.wordpress.com/2016/12/tarsius588.jpg?w=584&h=758?w=231″ data-large-file=”https://pterosaurheresies.files.wordpress.com/2016/12/tarsius588.jpg?w=584&h=758?w=584″ class=”size-full wp-image-25331″ src=”https://pterosaurheresies.files.wordpress.com/2016/12/tarsius588.jpg?w=584&h=758″ alt=”Figure 2. Tarsius, the extant tarsier. Note the several autapomorphies displayed here vs. the many plesiamorphies in Darwinius.” width=”584″ height=”758″ srcset=”https://pterosaurheresies.files.wordpress.com/2016/12/tarsius588.jpg?w=584&h=758 584w, https://pterosaurheresies.files.wordpress.com/2016/12/tarsius588.jpg?w=116&h=150 116w, https://pterosaurheresies.files.wordpress.com/2016/12/tarsius588.jpg?w=231&h=300 231w, https://pterosaurheresies.files.wordpress.com/2016/12/tarsius588.jpg 588w” sizes=”(max-width: 584px) 100vw, 584px” />

Figure 5 Tarsius, the extant tarsier. Note the elongate calcaneum and astragalus, as in Galago.

References
Geoffroy Saint-Hilaire E 1796. Mémoire sur les rapports naturels des Makis Lemur, L. et description d’une espèce nouvelle de mammifère. Magasin Encyclopédique, ou Journal des Sciences, des Lettres et des Arts 7: 20-50.

wiki/Galago



Source: https://pterosaurheresies.wordpress.com/2019/01/11/the-bushbaby-genus-galago-a-tarsier-mimic/
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