ড.
Dr. Mohammad Atikur Rahman
Associate Professor
Department of Entomology
Patuakhali Science and Technology University
Dumki, Patuakhali-8602
Phone: +88-04427-56014(424)
Mobile: +8801967958808
E-mail: [email protected]
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[email protected]
Course code: ENT 211
Course title: Basic Entomology
Entomology: The word Entomology came from the two Greek words “Entomos” that which is
cut in pieces or segmented, hence insect, and “logia” means scientific study. In a word,
entomology means scientific study of insects. But Entomology not only includes insects but also
their relatives ie. Spider, mites and ticks etc. It can also be defined, Entomology is the branch of
arthropodology that deals with insects and their relatives ie. Spider, mites and ticks etc.
Basic Entomology: It means the scientific study of fundamentals of insects and their relatives
ie. Spider, mites and ticks etc.
Arthropoda: The word Arthropoda came from two Greek words, “ Arthron” means joint and
“Podos” means foot, which together mean “jointed foot or jointed leg”. Thus the jointed legged
invertebrate animals under phylum Arthropoda are known as Arthropds.
Characteristics of arthropods:
1. Body segmented.
2. Paired jointed appendages, which includes antennae, mouthparts as well as walking
legs.
3. Body bilaterally symmetrical.
4. Body covered by an exoskeleton.
5. Usually goes under moulting.
6. Have a tubular alimentary canal, starting at mouth and ends by anus.
7. Have open circulatory systems consisting of a dorsal heart.
8. Respiration done by means of gills, or tracheae and spiracles.
9. Body cavity, hemocoel, is full of blood, haemolymph.
Classification of the phylum Arthropoda
Kingdom: Animalia
Sub-kingdom: Eumetazoa
Super-phylum: Ecdysozoa
Phylum: Arthropoda
Subphylum 1: Trilobitomorpha
Class 1: Trilobita
Eg. Trilobites (Extinct, kwon only from fossil)
Subphylum 2: Chelicerata
Class 1: Arachnida
Eg. Spiders, Scorpions, Mites and Ticks etc.
Lecture 01 | Dr. Mohammad Atikur Rahman
Class 2: Merostomata
Eg. King crabs, Horseshoe crabs etc.
Class 3: Pycnogonida
Eg. Pycnogonids
Subphylum 3: Crustacea
Class 1: Brachiopoda
Eg. Brine shrimp
Class 2: Remipedia
Eg. Blind crustaceans
Class 3: Cephalocarida
Eg. Horseshoe shrimp
Class 4: Maxillopoda
Eg. Fish lice
Class 5: Ostracoda
Eg. Seed shrimp
Fig. Lobster
Class 6: Malacostraca
Eg. Lobsters, crabs, shrimps etc.
Subphylum 4: Myriapoda
Class 1: Chilopoda
Eg. Centipedes
Class 2: Diplopoda
Eg. Millipedes
Class 3: Pauropoda
Eg. Sister group to millipedes
Class 4: Symphyla
Eg. Recemble centipedes
Subphylum 5: Hexapoda
Fig. a) Centipede b) Millipede
Class 1: Insecta
Eg. True insects
c) Pauropod d) Symphylan
Class 2: Entognatha
Eg. Spring tail, usually wingless insects.
Fig. Butterfly (true insect)
Fig. Proturan
Lecture 01 | Dr. Mohammad Atikur Rahman