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Mammalogy > Week 4 > Flashcards

Week 4 Flashcards

1
Q

!Artiodactyla

A

Even-toed ungulates

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2
Q

!Artiodactyla 3 sub-orders

A

Suiformes
Tylopoda
Ruminatia

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3
Q

!Suiformes family

A

Suidae - pigs
Tayassuidae - peccaries
Hippopotamidae - hippos

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4
Q

!Tylopoda family

A

Camelidae - camels and liamas

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5
Q

!Ruminatia family

A 
Tragulidae - chevrotains
Moschidae - musk deer 
Cervidae - deer 
Giraffidae - giraffe and okapi 
Antilocapridae - pronghorn 
Bovidae - cattle, antelope, sheep etc
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6
Q

!Artiodactyla (even-toed ungulates) general characteristics:

  • Digits
  • Hooves
  • Molars
A
  • digits are reduced
  • Hooves present
  • Molarised pre-molars due to herbivorous diet.
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7
Q

!Artiodactyla feet:

  • Suiformes
  • Ruminatia
  • Tylapoda
A

*suiformes:
Each metacarpal bone is distinct from eachother.
*Ruminatia:
Metacarpals are fused for the entire length.
Tylopoda:
Metacarpals are fused up until the distal end.

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8
Q

!Suines Vs Ruminants (and Tylopoda):

  • Diet
  • Dentition
  • Limbs
A

Suines

  • Diet: Omnivores (they eat plant material but also fruit and carrion.
  • Dentition: low-crowned check teeth with simple cusps. Have large tusk like canines.
  • Short limbs with 4 toes

Ruminants:

  • Diet: specialised herbivores. Have specialised stomachs and chew cud to deal with high fibre food. Ridged teeth and high-crowned hypsodont.
  • Elongated limbs and reduced number of functional toes (Usually 2 instead of 4 toes).
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9
Q

!Cud

A

portion of food that returns from a ruminant’s stomach to the mouth.

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10
Q

!Artiodactyla lifestyle

A

Adapted for:
Cursorial lifestyle. However some are amphibious such as hippos.
Nocturnal, crepuscular, and diurnal

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11
Q

!Artiodactyla distribution

A

Very diverse!

All continents apart from Australasia, and Antarctica.

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12
Q

!Suidae (in sub-order suiformes) distribution

A

Europe, Africa, and Asia

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13
Q

Swine skull morphology

A

pre-nasal bone - helps to dig up soil (rooting behaviour).

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14
Q

!Tayassuidae (in sub-order suiformes) distribution

A

America

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15
Q

!Tayassuidae (in sub-order suiformes) skull morphology

A
  • smaller than pigs
  • Robust zygomatic arch
  • Canines occlude (meet when jaw is shut) which stabilise the jaw when cracking hard nuts
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16
Q

!Hippopotamidae (in sub-order suiformes) distribution

A

Africa

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17
Q

Hippopotamidae (in sub-order suiformes) skull morphology

A

Lower canines are tusk-like and larger than upper canines. Used for sexual combat and defence.

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18
Q

!Hippopotamidae (in sub-order suiformes) human interaction

A
  • Habitat distruction biggest threat to pygmy hippo
  • Hunting is biggest threat to common hippo
  • Both do well in captivity
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19
Q

!Hippopotamidae, common Vs pygmy hippos

A

*Common hypo:
Day spent in water/ more aquatic.
As a result the eyes and ears are more on the top of the head.
*Pygmy hippo:
Less aquatic
As a result the eyes and ears are more on the side of head.

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20
Q

!Camelidae (in sub-order Tylopoda) distribution

A

Africa and South America

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21
Q

!Camelidae (in order tylopoda) skull morphology

A
  • large skulls

* Isolated upper incisors (gap/diestema between canines and premolars).

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22
Q

Camels adaptations to:

  • Sand
  • Lack of water
  • Hot and cold temps
A
  • body weight rests on sole pads in the hoof. Helps to distribute the weight when walking on sand.
  • Concentrating urine conserves water
  • Elliptical red blood cells - protect is from dehydration (because the blood can circulate more easily and expand quicker when hydrated).
  • Fat storage in humps helps to conserve water. Also the fat storage allows the camels body temperature to rise be 6° without the need of sweating. Conserves water and helps survive hot climates.
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23
Q

!Camelidae (in sub-order Tylopoda) Human interaction

A
  • Llama and alpaca are domesticated
  • Llamas and camels used for carrying loads
  • Alpacas used for wool
  • All species used for meat
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24
Q

!Tragulidae (in sub-order ruminatia) distribution

A

Around the equator - Africa and southeast Asia.

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25
Q

!Tragulidae (in sub-order ruminatia) skull morphology

A
  • lack upper incisors
  • Incisor-like lower canines
  • Only 3 pre-molars
  • No horns or antlers but instead…
  • Males have continuously growing upper canines which are used for sexual competition
  • Selenodont molars with Cresent shaped ridges which are adapted for cutting and slicing vegetation.
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26
Q

!Tragulidae (in sub-order ruminatia) other characteristics:

  • Size
  • Stomachs
A
  • small size
  • Males smaller than females
  • Short, thin legs which limit agility
  • Primitive ruminants - so although they have 4 chambered stomachs, the 3rd stomach is poorly developed.
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27
Q

!Moschidae, musk deer (in sub-order ruminatia) distribution

A

Cold climates/mountains

Eastern Asia

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28
Q

!Moschidae, musk deer (in sub-order ruminatia) skull morphology

A
  • very prominent canines (and so lack antlers)

* Teeth move in sockets to avoid breaking during feeding and combat

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29
Q

musk deer

*Movement

A

*Movement

Enlarged hooves act as snow shoes. They are very agile and can climb trees

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30
Q

!Moschidae, musk deer (in sub-order ruminatia) human interaction

A
  • Hunted and farmed for the secretion of the male musk gland which is used in perfumes.
  • Habitat loss
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31
Q

!Cervids deer, true deer (in the sun-order ruminatia) distribution

A

Very widespread

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32
Q

!Cervids deer, true deer (in the sun-order ruminatia) skull morphology

A
  • brachydont cheek teeth for a browsing diet
  • Antlers from frontal bone that grow and she’d annually. Reduction in sex hormones cause the shedding.
  • Except water deer males have long canines and no antlers
  • No upper incisors
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33
Q

true deer identification from tear duct

A

True deers have two small tear duct holes (double lacramal)

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34
Q

!Cervids deer, true deer (in the sun-order ruminatia) human interaction

A

Deer hunted for both sport and meat. Also farmed for meat.

Red deer overpopulation in Scotland

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35
Q

!Giraffidae, giraffes & okapi (in sub-order ruminatia) distribution

A

Africa

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36
Q

Giraffidae, giraffes & okapi skull morphology

A

*Ossicones = skin covered horns

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37
Q

Giraffidae, giraffes & okapi lifestyle/diet

A

Both species are browser (use the long tongue)

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38
Q

!Giraffidae, giraffes & okapi (in sub-order ruminatia) human interaction:

A

Hunting and habitat loss threaten both species

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39
Q

!Antilocapridae, pronghorn (in sub-order ruminatia) distribution

A

Canada and Mexico

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40
Q

!Antilocapridae, pronghorn (in sub-order ruminatia) skull morphology

A
  • continuously growing cheek teeth due to abrasive particles in diet.
  • Selenodont cheek teeth
  • Unique horns: they are unbranched
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41
Q

!Antilocapridae, pronghorn (in sub-order ruminatia) human interaction

A

Hunting and habitat loss are the main threats

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42
Q

!Bovidae, antelope, cattle, sheep, etc (in sub-order ruminatia) distribution

A

Most diverse family and widespread

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43
Q

!Bovidae, antelope, cattle, sheep, etc (in sub-order ruminatia) skull morphology

A
  • large
  • High crowned cheek teeth
  • Absent upper canines
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44
Q

!Bovidae, antelope, cattle, sheep, etc (in sub-order ruminatia) other characteristics
*Horns

A
  • horns occur in all males and in some females
  • Horns are never shed or branched
  • Horns are used for sexual combat and defence
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45
Q

!Bovidae, antelope, cattle, sheep, etc (in sub-order ruminatia) human interaction

A

*hunted for meat, hide, wool, and sport.

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46
Q

!Order Paenungulata

A

Sub-ungulates

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47
Q

!Sub-ungulates Vs ungulates

A 
Ungulates = Laurasiatheria (placental mammals clade)
Sub-ungulates = Afrotheria (clade of mammals that have an African origin).
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48
Q

!Sub- ungulate 3 sub-orders

A
  • sirenia - manatees and dugong
  • Hyracoidea - hyraxes
  • Probiscidae - elephants
49
Q

!sub-ungulate Dentition

A
  • no canines

* Specialised incisors, molars, and premolars depending on sub-order

50
Q

!Sub-order Sirenia (manatees and Dugong) 2 families

A

Trichechidae - Manatees

Dugongidae - Dugong

51
Q

!Sub-order Sirenia

A

Manatees and Dugong

52
Q

!Sub-order Sirenia (manatees and Dugong) distribution

A

Tropical waters above 20°, so around the equator

53
Q

Sub-order Sirenia (manatees and Dugong) characteristics:

  • Mouth/snout
  • Nostrils
  • Diet
A

*Mouth/snout:
Snout covered in bristles for finding food.
*Nostrils:
Are on top of the snout so it can be submerged in water except the nostrils to breath.
*Diet:
Herbivorous diet and so has extremely long intestines and used hind-gut fermentation.
The tropical waters allow them to have a lower metabolic rate which they need due to low energy food.

54
Q

!Sub-order Sirenia (manatees and Dugong) skull morphology

A

Large skull

Heavy lower jaws

55
Q

!Sub-order Sirenia (manatees and Dugong) body skeleton:

  • Forelimbs
  • Hindlimbs
  • Other
A 
*forelimbs:
Are well developed for support 
*Hindlimbs:
Lack bones (the tail)
*Other:
Dense bone with no air spaces
56
Q

manatees skin

A

*Manatees have vibrissae over the entire body which is used for sensory input in hard to see waters

57
Q

!Sub-order Sirenia (manatees and Dugong) West Africa manatee and Indian manatee Vs Amazon manatee & Dugon

A

West African & Indian manatees have nails on flippers.

Amazon manatees and Dugons don’t

58
Q

!Sub-order Sirenia (manatees and Dugong) manatee Vs dugong

  • Tail
  • Habitat
  • Skull morphology
A 
Manatee:
*Rounded paddle shape tail 
*Marine & fresh water 
*Nasals present. Premaxilla is small
Dugong:
*Crescent/"whale-shaped" tail 
*Marine only
*Absent nasals. Large and ventrally deflected pre-maxillae
59
Q

!Family Trichechidae

60
Q

!Trichechidae- manatees (in sub-order Sirenia) dentition

A
  • incisors present as milk teeth
  • adults lack incisors and canines
  • Indefinite number of cheek teeth
  • Brachydont and lophodont check teeth (very ridged).
61
Q

!Trichechidae- manatees (in sub-order Sirenia) diet

A
  • Aquatic plants and grasses
  • The abrasive silica wears down molars and that’s why they have to be continually replaced.
  • The cellulose is broken down by hind-gut fermentation.
62
Q

!Trichechidae- manatees (in sub-order Sirenia) human interaction

A
  • Hunted for meat and blubber
  • Accidental kills from boat motors
  • Used for clearing waters filled with certain vegetation that they eat.
63
Q

!Digging

64
Q

!Dugongidae- dugong (in sub-order Sirenia) distribution

A

East Africa to Vanuatu

65
Q

dugong (in sub-order Sirenia) Dentition

A

*mobile snout

66
Q

!Dugongidae- dugong (in sub-order Sirenia) diet

A

*feed on sea grass which lack silica (so doesn’t wear down cheek teeth unlike manatees diet).

67
Q

!Dugongidae- dugong (in sub-order Sirenia) human interaction

A
  • can get caught in fish traps
  • Hunted for meat and blubber
  • Injured by motor boats
68
Q

!Hyracoidea

69
Q

!Hyracoidea family (in sub-order paenungulata)

70
Q

!Hyracoidea - hyraxes (in sub-order paenungulata) distribution

71
Q

!Hyracoidea - hyraxes (in sub-order paenungulata) characteristics:

  • Body
  • Feet
  • Hairs
A

*body:
Small size
Short stumpy tail
*Feet:
To aid climbing:
Rubbery pads. Sweat glands keep feet sticky. Retractable soles to create some suction.
*Long hairs on body to aid in moving through dark rocky areas.

72
Q

hyraxes dentition

A

*Incisors are continuously growing. They are self sharpening and chisel-like.

73
Q

hyraxes diet

A

*Efficient kidneys and so can survive on minimal water - excretion of high concentration urea.

74
Q

!Hyracoidea - hyraxes (in sub-order paenungulata) feet

A
  • Mesaxonic feet
  • Hind feet have hoof like nails like elephants
  • Hind feet have 3 toes
  • Forefeet have 5 toes
75
Q

hyraxes metabolism

A

*inactive and have a low metabolism - due to diet.

76
Q

!Hyracoidea - hyraxes (in sub-order paenungulata) human interaction

A

Hunted for fur
Threatened by deforestation
Crystallised urine collected for medication

77
Q

!Probiscidae (in sub-order ungulates)

78
Q

!Probiscidae (in order paenungulata) family

A

Elephantidae - elephants

79
Q

!Probiscidae/elephantidae distribution

A

Africa and Asia

80
Q

!Probiscidae/elephantidae difference between African and Asian elephants

  • Size
  • Back
  • Ears
  • Trunk
  • Tusks
  • Toes
A 
*African
Larger
Concave back 
Large ears
Trunk with 2 lips 
Both sexes have tusks forefoot has 4 toes and hindfoot has 3 toes.
*Asian 
Smaller
Convex back 
Smaller ears 
Trunk with 1 lip
Males have the tusks
Forefoot 5 toes, hindfoot 4 toes
81
Q

!Probiscidae/elephantidae tusks

A

Elongated upper incisors

82
Q

!Probiscidae/elephantidae diet

A

Browser for vegetation and fruit.

Has inefficient non-ruminant digestion (only 50% digested)

83
Q

!Probiscidae/elephantidae Skull morphology

A

Huge skulls to support large teeth and trunk
Many air pockets reduce the weight
External nares - where the trunk joins the skull
Molars replaced, until they starve to death after last set

84
Q

!(Probiscidae/elephantidae) African Vs Asian dentition

A 
*African:
Browsing
 Loxodonta molars (sloping teeth)
*Asian:
Grass (tougher material)
Lophodont molars (parallel ridges)
85
Q

!Probiscidae/elephantidae brains

A

Large brains

Large temporal lobe which increases memory for identity of individuals, danger, feeding and watering sites.

86
Q

Probiscidae/elephantidae ears

A

Good hearing

Thermoregulation (increasing blood flow and flapping to cool down).

87
Q

Probiscidae/elephantidae feet

A

Walks on toes with a fatty matrix that spreads the weight and reduces pressure

88
Q

!Probiscidae/elephantidae Trunks uses

A
  • olfaction
  • Vocalisation
  • Snorkel
  • Shower (picking up water or dust)
  • Tool
  • Tactile organ (touch and cares eachother)
89
Q

!Probiscidae/elephantidae human interaction

A

Work animals
Hunted for ivory
Shot for sport and crop pests
Used in religions and art

90
Q

!Perissodactyla

A

Odd-toed ungulates

91
Q

!Artiodactyla Vs Perissodactyla digestion

A

*Artiodactyla:
Fore-stomach fermentation. Process food slowly but get more energy.
*Perissodactyla:
Hind-gut fermentation. They process food quickly but get less energy

92
Q

!Hind-gut vs fore-gut fermentation

A

*fore-gut
Protein converted into ammonia which is transported to the liver and converted into urea. The urea then consumed by the microbes. Proteins then produced by microbes are what’s consumed.
They need to drink less frequently.
Can specialise on plants.
*Hind-gut
Urea is not recycled like above and so have to drink more often.
All proteins have to be obtained directly from the diet.
Can maximise fruit in the diet.

93
Q

!perissodactyla Vs Artiodactyla jaw musculature

A 
*Perissodactyla:
Pronounced lower jaw 
Large masseter muscle 
Grinds fibrous food 
Put more effort into the mechanical digestion because there guts are shit.
*Artiodactyla:
Less pronounced jaw
Smaller masseter muscle 
Chews half-digested cud
94
Q

!Perissodactyla 2 sub-orders

A

Hippomorpha

Ceratomorpha

95
Q

!Hippomorpha suborder 1 family

A

Equidae - horses

96
Q

!Ceratomorpha sub-order, 2 families

A

Tapirida - tapirs

Rhinocerotidae - rhinoceroces

97
Q

!Equidae

98
Q

!Tapirida

99
Q

!Rhinocerotidae

A

Rhinoceroces

100
Q

!Perissodactyla characteristics

A
  • reduced digits
  • Hooves
  • Molarised pre-molars (to aid in mechanical digestion)
101
Q

!Perissodactyl feet

A
  • reduced number of toes
  • Tapir and rhino stands on 2nd, 4rd, and 4th digits
  • Horses stand on 3rd digit
102
Q

!Perissodactyla diet

A
  • Herbivores
  • Equids = grazers
  • Tapirs = browsers
103
Q

!Perissodactyla distribution

A 
South America, South Africa, and Asia
Wide habitat (desert - rainforest).
104
Q

!Equidae - horses (in sub-order hippomorpha) distribution

A

Africa and Asia

105
Q

!Equidae - horses (in sub-order hippomorpha) skull morphology

A 
Large 
Long rostrum 
Prominent nasals
Small bullae
Orbit (eye sockets) posterior (behind) tooth row
106
Q

!Equidae - horses (in sub-order hippomorpha) dentition

A

Hypsodont molars and premolars for grinding vegetation.
Canines located in the diastema
Jaw movement allows side-to-side grinding action

107
Q

Equidae - horses (in sub-order hippomorpha) other characteristics
*Eyes

A

*Eyes

Large on the side of the head for spotting predators in open plains

108
Q

!Equidae - horses (in sub-order hippomorpha) human interaction

A
  • hunted for meat and hide

* Horses and donkeys domesticated for transport and working.

109
Q

!Tapiridae - Tapirs (in sub-order ceratomorpha)distribution

A

South America, Malaysia and Thailand

Tropical rainforest except mountain tapir

110
Q

!Tapiridae - Tapirs (in sub-order ceratomorpha) Skull morphology

A
  • large
  • Reduced nasals
  • Nasal none supports the top of trunk
  • Brachyodont cheek teeth
111
Q

Tapiridae - Tapirs (in sub-order ceratomorpha) other characteristics

A

Short, mobile, prehensile trunk

112
Q

Tapiridae - Tapirs (in sub-order ceratomorpha) diet

113
Q

!Tapiridae

114
Q

!Tapiridae - Tapirs (in sub-order ceratomorpha) social structure

A

Solitary
The range of males may overlap many females
Territories marked with dung piles

115
Q

!Tapiridae - Tapirs (in sub-order ceratomorpha) lifestyle

A

Terrestrial
Semi-aquatic (they go in water to escape predators and use there trunk as a snorkel)
Crepuscular

116
Q

!Rhinocerotidae - rhinos (from sub-order Perissodactyla) distribution

A

Africa and Asia

Grassland, Savannah and rainforests

117
Q

!Rhinocerotidae - rhinos (from sub-order Perissodactyla) skull morphology

A 
Large - to support a horn
Enlarged nasals
Upper canines absent 
African canines lack incisors
Lophodont molars
118
Q

!Rhinocerotidae - rhinos (from sub-order Perissodactyla) other characteristics:

  • Senses
  • Horns
  • Canines
  • Asian rhinos
A
  • senses - good sense of smell and hearing but poor vision
  • Horn - defence and sexual combat in African rhinos
  • Canines - defence and sexual combat in Asian rhinos.
  • Asian rhinos - have armoured plates
119
Q

Black Vs white rhino

A 
Black = have a narrow lip 
White = have a wide lip

Mammalogy (17 decks)

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