Zygoneura (Pharetratula) bidens (Mamaev, 1968)

Polevoi, Alexei, Ruokolainen, Anna & Shorohova, Ekaterina, 2018, Eleven remarkable Diptera species, emerged from fallen aspens in Kivach Nature Reserve, Russian Karelia, Biodiversity Data Journal 6, pp. 22175-22175 : 22175

Zygoneura (Pharetratula) bidens (Mamaev, 1968)

Materials

Type status: Other material. Occurrence: recordedBy: A. Polevoi; sex: 1 male; Location: country: Russia; stateProvince: Karelia; locality: Kivach Nature Reserve ; verbatimLatitude: 62.281; verbatimLongitude: 33.967; verbatimCoordinateSystem: Decimal degrees; verbatimSRS: WGS84; Identification: identifiedBy: A. Polevoi; Event: samplingProtocol: Trunk emergence trap; eventDate: 2016-05-26 /06-23; Record Level: institutionCode: FRIP Type status: Other material. Occurrence: recordedBy: A. Polevoi; sex: 1 male; Location: country: Russia; stateProvince: Karelia; locality: Kivach Nature Reserve ; verbatimLatitude: 62.281; verbatimLongitude: 33.967; verbatimCoordinateSystem: Decimal degrees; verbatimSRS: WGS84; Identification: identifiedBy: A. Polevoi; Event: samplingProtocol: Trunk emergence trap; eventDate: 2016-06-23 /07-21; Record Level: institutionCode: FRIP Type status: Other material. Occurrence: recordedBy: A. Polevoi; sex: 13 males; Location: country: Russia; stateProvince: Karelia; locality: Kivach Nature Reserve ; verbatimLatitude: 62.281; verbatimLongitude: 33.967; verbatimCoordinateSystem: Decimal degrees; verbatimSRS: WGS84; Identification: identifiedBy: A. Polevoi; Event: samplingProtocol: Trunk emergence trap; eventDate: 2016-07-21 /08-19; Record Level: institutionCode: FRIP Type status: Other material. Occurrence: recordedBy: A. Polevoi; sex: 1 male; Location: country: Russia; stateProvince: Karelia; locality: Kivach Nature Reserve ; verbatimLatitude: 62.281; verbatimLongitude: 33.967; verbatimCoordinateSystem: Decimal degrees; verbatimSRS: WGS84; Identification: identifiedBy: A. Polevoi; Event: samplingProtocol: Trunk emergence trap; eventDate: 2016-08-19 /09-28; Record Level: institutionCode: FRIP

Diagnosis

Gnats of the genus Zygoneura are distinguished from other Sciaridae by widely curved fork of wing vein M and long neck of flagellomeres (Fig. 9a). Zygoneura bidens can be recognised by the two dark spines on a shared lobe in the middle of gonostylus (Fig. 9b; see also Shin et al. (2014), fig. 1: A, B).

Distribution

Palaearctic: Slovakia ( Rudzinski and Ševčík 2012), China, Korea and the Russian Far East ( Shin et al. 2014).

Ecology

Evidently saproxylic as other species of the subgenus Pharetratula . In Korea, collected at a shiitake farm with oak trunks used as a substrate for shiitake culture ( Shin et al. 2014). According to the authors' data, the species prefers wind-broken aspens with a mean diameter of ca. 40 cm and having died 9 years ago Table 1. It favoured the trunks colonised by Peniophora incarnata (RS=0.61, P<0.05).