an introduction to the histology of lepidoptera internal anatomy... · •r.e. chapman, the insects...
TRANSCRIPT
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An Introduction to the
Histology of Lepidoptera
Ray B. Nagle
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Histologic Preparation
• Tissue is fixed by cross-linking or
precipitating proteins.
• Tissue is dehydrated and embedded in
wax (paraffin).
• Thin (3-6um) sections are cut onto glass
slides using microtome.
• Sections are de-waxed, rehydrated, and
stained and coverslipped.
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Insect Histology
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Insect Histology Preparation
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The Integument
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Epidermis
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Intersegmental Cuticle
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Head Capsule vs Thoracic
integument
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Fig. 30
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Mechano receptors
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Trichogen and Gland Cells in
Larval Tubercle
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Fig. 29
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Lepidopteral Scales
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Fig. 32
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Simple Integumental Gland
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Epidermal Gland
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Fig. 26
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Apodeme
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Muscle attachment to Cuticle
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Fig. 10.5
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Molting (Apolysis) Epidermis in
G. incorrupta larvae
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Hardening the Pre-tanned
Exocuticle
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Male Reproduction
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Male Reproductive Tract
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Larval Testis
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Adult Testis
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Vas Deferens
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Seminal Vesicle
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Accessory Gland
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Female Reproduction
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Female Reproductive Tract
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Ovariole
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Maturing Ova
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Female Reproductive Tract
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Ostium Copulatrix and Vagina
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Arctiid Ova
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Fig. 12.14
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Crambidia cephalica
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H. Permaculata Accesory
Glands
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Female Accessory Glands in
Malacosoma
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Malacosoma ova covered with
spumaline
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Fig. 12.14
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Ostium copulatrix
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Bursa Copularix
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Spermatophore in Bursa Copulatrix
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Gastrointestinal System
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Fig. 190
Insect Gastrointestinal System
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Fig. 196
Larval GI Tract
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Fig. 191
Foregut (Stomodeum)
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Noctuid Larval Buccal Cavity
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Foregut-Midgut
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Proventriculus- Gastric Junction
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Gastrointestinal Tract
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Midgut
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Noctuid Larval Midgut
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Fig. 201
Midgut (Ventriculus)
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Peritrophic Membrane
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Fig. 202
Midgut Epiithelium
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Midgut in Larval Grammia
incorupta
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Midgut in Adult Arachnis picta
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Fig. 197
Changes in GI Tract with
Development
Larva
Pupa
Adult
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Gastrointestinal Tract
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Hindgut
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A. Picta Pylorus
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Midgut- Hindgut
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Colon and Rectum
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Fat Body in Larval Grammia
incorrupta
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Adult Fat Body
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Silk Gland
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Excretory System
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Malpighian Tubules Arising from
Midgut-Hindgut Transition
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Malpighian tubule
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Rectum
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Malpigian Tubules
Adherent to Hind Gut
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Nervous System
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Noctuid Larval Stemmata
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Compound Eye
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Adult Eye and Brain
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Ventral Nerve Cord
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Antennae
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Labial Palp
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Organ of vom Rath from Labial
Palp of Pieris rapae
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Respiratory System
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Larval Spiracles
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Noctuid Larval Tracheal System
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Tracheal System
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Circulatory System
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Heart
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Coelomocytes
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Melanization Reaction
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Parasite Encapsulation
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Acknowlegements
• William Meek
• Erika Dexter
• Edward Abril
• R.E. Chapman, The Insects Structure and
Function. Cambridge Univ. Press
• R.E. Snodgrass, Principles of Insect
Morphology. Cornell Univ. Press