apodeme


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apodeme

[′ap·ə‚dēm]
(invertebrate zoology)
An internal ridge or process on an arthropod exoskeleton to which organs and muscles attach.
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Claws that are long relative to their height have high tip velocity per unit distance contracted by the muscle attached to the apodeme, but low mechanical advantage.
The function of this might be to reinforce the lateral apodeme when subjected to muscular contractions.
In addition to the characters given in the genus description, this new species is unique and distinct in the following combination of characters: rostrum coarsely and densely punctate, with a median carina distinct medially; pronotum at the middle with 2 spots separated by longitudinal rows of pale brown scales; interstria broader than stria; aedeagus with the median lobe in profile strongly arcuate, abruptly narrowed and slightly hooked at the apex, endophallus with a pair of hook-like structures, and with 2 pairs of pointed sclerotized structures between apodeme.
Shape and number of apodemes and epimeral borders typical for genus.
21): Densely arranged anteriorly directed setae present on T6-8 and S6-8; T8 with broad anterior rectangular apodeme; T9 formed by wide, rectangular sclerite with median protuberance; T9 + 10 entirely fused, T10 divided into 2 heavily sclerotised acanthophorite plates, 5-9 acanthophorite spines per plate; 2 spermathecae, all equally large, formed by more-or-less expanded weakly sclerotised ducts; individual spermathecal duct long; S9 (furca) formed by 1 sclerite, ring-like (joined anteriorly and posteriorly), anterior furcal apodeme present, 2 lateral projections forming divided apodeme, lateral furcal apodeme absent, median furcal bridge absent.
24 and 25), in lateral view, dorsal apodeme longer than half of aedeagal shaft, shaft slender, laterally compressed, nearly of equidistant from basally to apically, ventral margin sinuated, subapex concave, lateral margin with sheet process with marginal serrate and occupied 0.
29), anterior arm with smoothly rounded corners, anterior arm clearly longer than posterior arm; ejaculatory apodeme strongly broadening apically, fan-shaped (Fig.
13); aedeagus with ventral apodeme long and forked, dorsal apodeme reduced and apical cap extended and wing-like (Figs 16, 17).