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A tarsal formula states the number of segments of an insect's tarsi as three numbers, a-b-c, starting with the fore leg (a), then the middle leg (b), then the hind leg (c). For example, a tarsal formula of "5-5-4" as found in the Trictenotomidae means there are five segments in the fore leg's tarsi, five segments in the middle leg's tarsi, and ...
Occasionally, males have tarsal formula reduced to 4-4-4, 3-3-3 or 3-4-4. [ 2 ] Larval Tenebrionoidea can be distinguished by various features of the head: a posteriorly diverging gula with well developed gular ridges, posterior tentorial arms being shifted anteriorly, asymmetric mandibles, the M. craniocardinalis vestigial or absent, and the M ...
Adults can be recognised by the procoxal cavities being internally open in most taxa, females having tarsal formula 5-5-5 and males 5-5-5 or 5-5-4 (rarely 4-4-4), females with tergite VIII concealed dorsally by tergite VII, and males with tergite X completely membraneous. [1]
Adult Coccinelloidea have a reduced tarsal formula (each tarsus with 4 or 3 segments), hind coxae separated by more than 1/3 their width, the intercoxal process of abdominal ventrite 1 usually broadly rounded or truncate, hindwings with reduced anal veins and lacking a closed radial cell, the adeagus resting on its side when retracted and the phallobase usually reduced.
Leaf beetles are partially recognizable by their tarsal formula, which appears to be 4-4-4, but is actually 5-5-5 as the fourth tarsal segment is very small and hidden by the third. [2] As with many taxa, no single character defines the Chrysomelidae; instead, the family is delineated by a set of characters. [3]
The first commercial formulas. In 1846, Liebig, an acclaimed German chemist, had described all living tissue, including food, as being composed of different proportions of fats, carbohydrates and ...
The Micropeplinae are a subfamily of the Staphylinidae, rove beetles. [1] Their antennae have 9 segments with single-segmented clubs. The tarsal formula is 4-4-4 (appearing as 3-3-3).
Meibomian glands (or tarsal glands) Coats the aqueous layer, provides a hydrophobic barrier that envelops tears and prevents their spilling onto the cheek. These glands are located among the tarsal plates, and thus deposit the tear fluid between the eye proper and the oil barriers of the lids. [2] Aqueous layer