epistome


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epistome

(ˈɛpɪˌstəʊm)
n
(Zoology) the area between the mouth and antennae of crustaceans and some insects
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Diagnosis.--Troglomorphic habitus; carapace without eyes or eyespots; epistome triangular and small; carapace with 8 setae on posterior margin; pedipalp smooth excepted for femur which is finely granular in basal part; pedipalp slender, both chelal fingers with 108-109 teeth; femur 5.20 times (length 2.29), patella 4.30 times (length 2.28) longer than broad, pedicel about half of total length of patella.
Epistome bifurcated anteriorly and pilose, basal part not clearly visible.
Carapace: subquadrate, slightly longer than broad, constricted posteriorly; medial part of anterior margin strongly prominent, with rudimentary epistome, and strongly dentate, showing variability in its development (Figs.
shapes of epistome, tritosternum, chelicerae and hypostomal setae), the genus Neodiscopoma is treated as a species group within the genus Uropoda, as the Uropoda splendida group.