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Strepsirhines

Primates. Strepsirhines. Haplorhines. Lorisoidea “Mainland Africa”. Lemuroidea “Malagasy”. Tarsioidea. Anthropoidea. Tarsiers. Lorises and Galagos. Lemurs. Platyrrhines. Catarrhines. Ceboidea “New World Monkeys”. Cercopithecoidea “Old World Monkeys”. Cebids, Atelids,

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Strepsirhines

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  1. Primates Strepsirhines Haplorhines Lorisoidea “Mainland Africa” Lemuroidea “Malagasy” Tarsioidea Anthropoidea Tarsiers Lorises and Galagos Lemurs Platyrrhines Catarrhines Ceboidea “New World Monkeys” Cercopithecoidea “Old World Monkeys” Cebids, Atelids, and Callitrichids Hominoidea “Apes and Humans” Colobines and Cercopithecines Hylobatids, Pongids, and Hominids

  2. Strepsirhines Malagasy Strepsirhines Madagascar

  3. StrepsirhinesMalagasy Strepsirhines • Characteristics: • dental tooth comb • grooming claw on second digit of feet • postorbital bar • no postorbital closure • most have a mandibular symphysis • unfused frontal bone • variations in foot anatomy related to locomotion

  4. Pygmy Mouse Lemur Fat-tailed Dwarf Lemur Cheirogaleidae • 5 extant genera • Examples: • Pygmy Mouse Lemur (Microcebus myoxinus) • Coquerel’s Dwarf Lemur (Mirza coquereli) • Fat-tailed Dwarf Lemur (Cheirogaleus medius) • Characteristics: • Average weight ranging from 0.03-0.6kg • Nocturnal • Arboreal quadrupeds • Microcebus myoxinus is smallest living primate • Cheirogaleus medius hibernates for up to 6 months • Most females only receptive to mate for a few hours each year Dwarf Lemur

  5. Ring-tailed Lemur Bamboo Lemur Ruffed Lemur Lemuridae • 4 extant genera • Examples: • Ring-tailed Lemur (Lemur Catta) • Ruffed Lemur (Varecia variegata) • Gray Bamboo Lemur (Hapalemur griseus) • Characteristics: • Average weight ranging from 0.6-2.2 kg • Diurnal • Mostly arboreal quadrupeds • Hapalemur uses some Vertical Clinging and Leaping (VCL)

  6. Lepilemuridae • 1 extant genus • Examples: • White-footed Sportive Lemur (Lepilemur leucopus) • Characteristics: • Average weight ranging from 0.5-1.0kg • Nocturnal • Vertical Clingers and Leapers (VCL) • Reingests its feces to get broken-down cellulose Sportive Lemur

  7. Sifaka Indri Indriidae • 3 extant genera • Includes: • Woolly Lemur (Avahi) • Sifaka (Propithecus) • Indri (Indri indri) • Characteristics: • Average weight ranging from 0.7-6.8 kg • Specialized leapers with long hindlimbs, feet, and hands • All specialized VCL’s • Avahi is nocturnal • Propithecus moves bipedally on the ground • Indri has no tail

  8. Daubentoniids • Aye-aye (only extant species) • Characteristics: • enormous ears • rodent like incisors • large clawed digits, except for hallux • third digit is extremely long and slender • nocturnal • quadrupeds

  9. Lorises Galagos and Lorises Strepsirhines Mainland Africa Strepsirhines • Includes: • Galagidae (bushbaby) • Lorisidae (potto, slow loris, and slender loris) • Characteristics: • grooming claw on the second digit • nocturnal • arboreal quadrupeds • dental tooth comb Loris Galago

  10. Greater Bushbaby Slender Loris Slow Loris Galagos and Lorises • Examples of Galagos: • Greater Bushbaby (Otolemur garnetti) • Senegal Bushbaby (Galago senegalensis) • Characteristics: • Average weight ranging from 0.06-1.1kg • elongated calcaneus and navicular bones • VCL’s • Demidoff’s Bushbaby one of the smallest living primates • Examples of Lorises: • Slender Loris (Loris tardigradus) • Slow Loris (Nycticebus coucang) • Characteristics: • Average weight range from 0.3-1.1kg • Slow and stealthy quadrupeds

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