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1. Tarsi 5 segmented, pretarsus with pair of strong claws . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . .
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—. Tarsi 2–5 segmented; pretarsus with neither claws nor sensory spots; or tarsi 5-segmented and pretarsus with a pair of very weak claws, or a single
claw and with sensory spots . . . . . . . . . . . . . .
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2(1). Antenna 8 segmented; mandibles large and robust, triangular shaped,with broad
base and of generalized chewing structure. . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . .
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—. Antenna 6–7 segmented; mandibles, if present, small, narrow, and
bladelike.. . . . . . . . . . . . . . .
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3(2). Galeal lobe
at base of maxillary palp present .
. . . . . . . . . . . . . . . . . . . . ..
Protoxenidae
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—. Galeal lobe at base of maxillary palp absent . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . .
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4(3).
Protrochanter and profemur free . .
. . . . . . . . . . . . . . . . . . . . . . . . Cretostylopidae, n. fam.
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—. Protrochanter and profemur fused (Host: unknown) . . . . . . . . . . . . . . . . . . Bahiaxenidae
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5(2). Prementum
free, with short palps; hind wing CuA1 short, extending about to middle of wing; front
branch of MA absent; antenna 7- segmented, with
flabella on antennomeres III and IV
. . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . .Mengeidae
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—. Prementum fused to hypopharynx; hind wing CuA1 extending almost to edge of wing; MA strongly
developed with anterior branch; antenna 6- segmented, with flabella on antennomeres III to IV or III to V
(Host: Zygentoma: Lepismatidae) . .
. . . . . . . . . . . . . . . . . . . Mengenillidae
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6(1). Mandibles absent; tarsi 4–5 segmented, pretarsus with a pair of claws, or a
single claw, or tarsi 4 segmented and pretarsus
without claws; antenna 5–7 segmented, with flabella on antennomeres III–IV or III–V (Host:
Hemiptera: Cydnidae, Blissidae, Pentatomidae, Lygaeidae, Coreidae) (also
known from fossils) . . . . . . .
. . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . .
. . . . . . . . Corioxenidae
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—. Mandibles present, narrow and blade-like; tarsi 2–4 segmented, pretarsus without claws; antenna 4–7 segmented, with flabella on antennomeres only on
III or IV, or III & IV, or III to V, or III, V, & VI,
or III to VI. . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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7(6). Tarsi 3 segmented (Host: Hemiptera: Cercopidae, Cicadellidae, Coreidae,
Delphacidae, urybrachyidae, Flatidae, Fulgoridae, Issidae, embracidae,
Pentatomidae, Tettigometridae; Diptera: Tephritidae; rthoptera:
Tridactylidae; Blattaria: Blattellidae)
. . . . . . . . . Halictophagidae
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—. Tarsi 2 or 4 segmented. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
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8(7). Tarsi 2 segmented; antenna 4 segmented
(Host: Hemiptera: Delphacidae,
Dictyopharidae Eurybrachidae, Flatidae, Fulgoridae, Ricaniidae) . . . . . . . . . . . . . . . . . . . .
. . . . . Elenchidae
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—. Tarsi 4 segmented;
antenna 5–7 segmented . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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9(8). Antennae 7 segmented, with flabella on antennomeres III, V, and VI; maxillary
base five times longer than palpus (Host: unknown) (also known from
fossils) . . . . . . . . . . . . .
. . . Bohartillidae
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—. Antennae 4–7 segmented, with flabellum on antennomere IIII
only; maxillary base equal to, or smaller than palpus . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . .
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10(9). Antenna 4 or 6 segmented,
with flattened flabella . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . .
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—. Antenna 7 segmented,
with rounded flabella . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . .
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11(10). Antenna 6 segmented, metathorax
with spoon-shaped sclerite (Host: Hymenoptera: Andrenidae, Colletidae,
Halictidae) (also known from fossils)
. . . . . . . . . . . . . . . . . . Stylopidae
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—. Antenna 4 segmented,
metathorax with no spoon-shaped sclerite (Host: Hymenoptera: Masaridae,
Mutillidae, Sphecidae, Vespidae) .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Xenidae
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—. Wing venation with only CuA1 (Host: Males – Hymenoptera: Formicidae:
Dolichoderinae, Ecitoninae, Formicinae, Myrmicinae, Pseudomyrmecinae,
Ponerinae / Females – Orthoptera, Mantodea) (also known from fossils) . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . Myrmecolacidae
|
= = = = = = = = = = = = = = =
Reference:
Kathirithamby, J. and M. S. Engel. 2014. A revised key to the living and fossil
families of Strepsiptera, with the description of a new family, Cretostylopidae. J. Kansas Entomol. Soc. 87(4): 385-388.
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Note: Bohart noted Lychnocolacidae may not be a valid family.
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