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Larvae with obvious spines or processes on each segment
Larvae without obvious spines or processes (smooth) on each segment
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Larvae robust & rounded at both ends
Rudimentary mouth hooks
Found in skin of cattle
Very small spines present
(NOT IN AUSTRALIA)
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Posterior spiracles sunken and often completely hidden in rounded cavity
Slit nearly vertical (not directed towards opening)
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slit sinuous
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Peritreme broken
Peritreme entire
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Peritreme thin
No accessory sclerite
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Spines on ventral surface only
Mouth hooks well developed
Inner margin of spiracles scalloped
Found in sheep nasal sinuses
<< Prev SlideSpines encirling body
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Fleshy processes on dorsal & lateral aspects, few on ventral surface
Rows of small spines on first 2 or 3 anterior segments thereafter spines on central aspects
Larvae slender and pointed anteriorly
<< Prev SlideNo fleshy processes
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Densely covered with small black spines which form bands at posterior margins of segments
Spiracle slit straight
Larvae slender
(NOT IN AUSTRALIA)
<< Prev Slide1 or 2 rows of flat spines on the anterior margon of most segments
Larvae with 3 triangular anterior segments and remainder of larvae with parallel sides
Robust
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One row of spines on each segment
<< Prev SlideTwo rows of spines on each segment
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Mouth hook with saddle-like depression
<< Prev SlideMouth hooks uniformly bent
Ventral side of segment 3 with 1 interrupted row of spines
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Slit sinuous
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Peritreme entire
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Peritreme thin
No accessory sclerite
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Anterior spiracles with >10 lobes