Classification of Horse: Full Taxonomy (Order Perissodactyla)
Biology · The Living World · NEET
The order of horse (scientific name Equus caballus) is Perissodactyla. Its family is Equidae. Do not mix these up: Perissodactyla means "odd-toed" and is a bigger group (order), while Equidae is the smaller horse family below it. Memory hook: "Horses on ODD Perissodactyla feet" (odd number of toes = one hoof).
Full taxonomic hierarchy of the horse from Kingdom Animalia down to species caballus. The gold box marks the NEET answer: the ORDER is Perissodactyla, which sits one level above the family Equidae.
Your doubts, answered
Is the order of horse Equidae or Perissodactyla?
The order of horse is Perissodactyla. Equidae is the FAMILY of horse, not the order. In the NEET 2017 PYQ, students picked Equidae by mistake. Remember the hierarchy: Family Equidae sits BELOW Order Perissodactyla. Order is a bigger group made of related families.
What is the full classification of horse from Kingdom to Species?
Kingdom Animalia, Phylum Chordata, Class Mammalia, Order Perissodactyla, Family Equidae, Genus Equus, Species caballus. So the full scientific name is Equus caballus. Learn it top to bottom because NEET can ask any single rank.
What does Perissodactyla mean?
Perissodactyla means 'odd-toed ungulates' (hoofed animals with an odd number of toes). Horse stands on ONE central toe (the hoof). Rhinoceros and tapir are also in this order. This is why the memory hook 'odd toes = Perissodactyla' works for the horse.
Caballus and ferus are given as options — are they the order?
No. In the NEET 2017 question, caballus and ferus are specific epithets (the species-level part of the name), not the order. The order is Perissodactyla. Only the term that names the correct RANK is the answer, so read which rank the question asks for.
Why does NEET keep asking horse and housefly classification?
Because these are the two worked examples that test if you know which term belongs to which taxonomic rank. NEET does not want you to memorise the animal — it wants you to match a word (Perissodactyla, Equidae, Muscidae, Diptera) to its correct category. Master the rank, not just the name.
⚠️ The NEET trap ✗ The order of horse is Equidae. ✓ The order of horse is Perissodactyla. Equidae is the family (one level lower than order). 🧠 Order = Perissodactyla (odd toes). Equidae is the FAMILY. NEET 2017 put Equidae as the trap option — it sits below order in the hierarchy.
Real NEET questions
NEET 2017
Which of the following represents order of 'Horse'?
A · Equidae
B · Perissodactyla ✓
C · Caballus
D · Ferus
Solution: For horse (Equus caballus) the ORDER is Perissodactyla. Equidae is its FAMILY, and caballus/ferus are specific epithets (species-level), not the order. The trick is to match each word to its correct taxonomic rank. NCERT Ch 1, section 1.2.4 Order: 'Order being a higher category, is the assemblage of families which exhibit a few similar characters.'
Solved The Living World NEET PYQs
Try the real previous-year questions from this chapter — each with the answer and a full solution.
