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Sciocoris sideritidis
Family: Pentatomidae

Sciocoris is a very difficult genus and three similar species are now found in Britain. The genus is characterised by the strongly transverse (wider than long) pronotum, laterally expanded connexivum and very rounded head.

S. sideritidis is a smaller species and best identified by the following features in combination: markedly pale pronotal margins, a dark central stripe on the underside of the abdomen and a rather elongate and straight sided headshape. It is extremely similar to other European species, in particular S. maculatus and all potential records must be supported by a voucher specimen.

Adults overwinter and are probably polyphagous. S. sideritidis is native to the Mediterranean and is known only from a single site in south Essex, where a population was discovered close to a container port in 2018, the likely point of introduction.

Similar species: S. cursitans, S. homalonotus

Adult: All year
Length 4.5 - 6.0 mm

Sciocoris sideritidis
Adult: Essex (September 2018) ©Yvonne Couch

Sciocoris sideritidis Sciocoris sideritidis
Adult: Corfu (May 2014) ©Tristan Bantock

Adult: Essex (July 2020) ©Yvonne Couch

Sciocoris sideritidis Sciocoris sideritidis
Adult underside: Essex (July 2020) ©Yvonne Couch

Nymph: Essex (September 2018) ©Yvonne Couch