Boletina hyperborea Salmela

Salmela, Jukka, Suuronen, Anna & Kaunisto, Kari M, 2016, New and poorly known Holarctic species of Boletina Staeger, 1840 (Diptera, Mycetophilidae), Biodiversity Data Journal 4, pp. 7218-7218 : 7218

Boletina hyperborea Salmela sp. n.

Materials

Type status: Holotype. Occurrence: catalogNumber: MYCE-JS-2013-0185 ; recordedBy: J. Salmela; individualCount: 1; sex: male; Location: country: Finland; stateProvince: Lapponia kemensis pars orientalis; verbatimLocality: Savukoski, Joutenoja; verbatimLatitude: 67.8179; verbatimLongitude: 29.4458; verbatimCoordinateSystem: decimal degrees; verbatimSRS: WGS84; Event: samplingProtocol: Malaise trap; eventDate: 2012-6-14/7-10; habitat: headwater stream, boreal forest; Record Level: institutionCode: ZMUT

Type status: Paratype. Occurrence: catalogNumber: DIPT-JS-2014-0014 ; recordedBy: J. Salmela; individualCount: 1; sex: male; Location: country: Finland; stateProvince: Regio kuusamoensis; verbatimLocality: Salla, Värriö Strict Nature Reserve, Kuntasjoki; verbatimLatitude: 67.7494; verbatimLongitude: 29.6168; verbatimCoordinateSystem: decimal degrees; verbatimSRS: WGS84; Event: samplingProtocol: Malaise trap; eventDate: 2013-7-29/9-19; habitat: headwater stream, old-growth boreal forest; Record Level: institutionCode: JES

Type status: Paratype. Occurrence: catalogNumber: DIPT-JS-2014-0019 ; recordedBy: J. Salmela; individualCount: 1; sex: male; Location: country: Finland; stateProvince: Regio kuusamoensis; verbatimLocality: Salla, Värriö Strict Nature Reserve, Kuntasjoki; verbatimLatitude: 67.7494; verbatimLongitude: 29.6168; verbatimCoordinateSystem: decimal degrees; verbatimSRS: WGS84; Event: samplingProtocol: Malaise trap; eventDate: 2013-7-29/9-19; habitat: headwater stream, old-growth boreal forest; Record Level: institutionCode: JES

Type status: Paratype. Occurrence: catalogNumber: DIPT-JS-2014-0485 ; recordedBy: J. Salmela; individualCount: 1; sex: male; Location: country: Finland; stateProvince: Regio kuusamoensis; verbatimLocality: Salla, Värriö Strict Nature Reserve, Kuntasjoki; verbatimLatitude: 67.7494; verbatimLongitude: 29.6168; verbatimCoordinateSystem: decimal degrees; verbatimSRS: WGS84; Event: samplingProtocol: Malaise trap; eventDate: 2013-7-29/9-19; habitat: headwater stream, old-growth boreal forest; Record Level: institutionCode: JES

Type status: Paratype. Occurrence: catalogNumber: DIPT-JS-2015-0003 ; recordedBy: J. Salmela; individualCount: 1; sex: male; Location: country: Finland; stateProvince: Lapponia enontekiensis; verbatimLocality: Enontekiö, Käsivarsi Wilderness Area, Toskaljärvi N; verbatimLatitude: 69.1986; verbatimLongitude: 21.4530; verbatimCoordinateSystem: decimal degrees; verbatimSRS: WGS84; Event: samplingProtocol: Malaise trap; eventDate: 2014-7-2/8-21; habitat: rich, subalpine sloping fen, seepages; Record Level: institutionCode: ZMUT

Type status: Paratype. Occurrence: recordedBy: P.J. Skitsko; individualCount: 1; sex: male; Location: country: Canada; stateProvince: Yukon; verbatimLocality: Ogilvie Mountains, NE of Dawson City, North Fork Crossing, mile 43, Peel Plateau Rd.; verbatimElevation: 3500 ft; verbatimLatitude: 64.433; verbatimLongitude: -138.233; verbatimCoordinateSystem: decimal degrees; verbatimSRS: WGS84; Event: eventDate: 1962-7-4; Record Level: institutionCode: CNC

Type status: Other material. Occurrence: recordedBy: P.J. Skitsko; individualCount: 7; sex: male; Taxon: genus: Boletina; specificEpithet: hyperborea; scientificNameAuthorship: Salmela; Location: country: Canada; stateProvince: Yukon; verbatimLocality: Ogilvie Mountains, NE of Dawson City, North Fork Crossing, mile 43, Peel Plateau Rd.; verbatimElevation: 3500 ft; verbatimLatitude: 64.433; verbatimLongitude: -138.233; verbatimCoordinateSystem: decimal degrees; verbatimSRS: WGS84; Event: eventDate: 1962-7-4; Record Level: institutionCode: CNC

Type status: Other material. Occurrence: recordedBy: P.J. Skitsko; individualCount: 1; sex: male; Taxon: genus: Boletina; specificEpithet: hyperborea; scientificNameAuthorship: Salmela; Location: country: Canada; stateProvince: Yukon; verbatimLocality: Ogilvie Mountains, NE of Dawson City, North Fork Crossing, mile 42, Peel Plateau Rd.; verbatimElevation: 3500 ft; verbatimCoordinateSystem: decimal degrees; verbatimSRS: WGS84; Event: eventDate: 1962-6-24; Record Level: institutionCode: CNC

Type status: Other material. Occurrence: recordedBy: R.E. Leech; individualCount: 2; sex: male; Taxon: genus: Boletina; specificEpithet: hyperborea; scientificNameAuthorship: Salmela; Location: country: Canada; stateProvince: Yukon; verbatimLocality: Ogilvie Mountains, NE of Dawson City, North Fork Crossing, mile 43, Peel Plateau Rd.; verbatimElevation: 3500 ft; verbatimLatitude: 64.433; verbatimLongitude: -138.233; verbatimCoordinateSystem: decimal degrees; verbatimSRS: WGS84; Event: eventDate: 1962-7-4; Record Level: institutionCode: CNC

Type status: Other material. Occurrence: recordedBy: P.J. Skitsko; individualCount: 2; sex: male; Taxon: genus: Boletina; specificEpithet: hyperborea; scientificNameAuthorship: Salmela; Location: country: Canada; stateProvince: Yukon; verbatimLocality: Ogilvie Mountains, NE of Dawson City, North Fork Crossing; Event: eventDate: 1962-7-3; Record Level: institutionCode: CNC

Type status: Other material. Occurrence: recordedBy: J. Kjaerandsen; individualCount: 2; sex: 1 male, 1 female; Taxon: genus: Boletina; specificEpithet: hyperborea; scientificNameAuthorship: Salmela; Location: country: Finland; stateProvince: Lapponia inarensis; verbatimLocality: Utsjoki, Kevo SNR; verbatimLatitude: 69.7238; verbatimLongitude: 27.0428; verbatimCoordinateSystem: decimal degrees; verbatimSRS: WGS84; Identification: identifiedBy: J. Kjaerandsen; Event: eventDate: 2014-7-4/17; Record Level: collectionCode: TZS

Type status: Other material. Occurrence: recordedBy: T. E. Barstad; individualCount: 1; sex: male; Taxon: genus: Boletina; specificEpithet: hyperborea; scientificNameAuthorship: Salmela; Location: country: Norway; stateProvince: Finnmark; verbatimLocality: Vardø, Komagdalen, Stuorra Suovka; verbatimLatitude: 70.1; verbatimLongitude: 29.7; verbatimCoordinateSystem: decimal degrees; verbatimSRS: WGS84; Identification: identifiedBy: J. Kjaerandsen; Event: eventDate: 2009-7-2/15; Record Level: collectionCode: TZS

Type status: Other material. Occurrence: recordedBy: T. E. Barstad; individualCount: 8; sex: male; Taxon: genus: Boletina; specificEpithet: hyperborea; scientificNameAuthorship: Salmela; Location: country: Norway; stateProvince: Finnmark; verbatimLocality: Båtsfjord, Komagdalen, Bajit Suovka; verbatimLatitude: 70.1; verbatimLongitude: 29.7; verbatimCoordinateSystem: decimal degrees; verbatimSRS: WGS84; Identification: identifiedBy: J. Kjaerandsen; Event: eventDate: 2009-7-14/8-20; Record Level: collectionCode: TZS

Type status: Other material. Occurrence: recordedBy: T. E. Barstad; individualCount: 1; sex: male; Taxon: genus: Boletina; specificEpithet: hyperborea; scientificNameAuthorship: Salmela; Location: country: Norway; stateProvince: Finnmark; verbatimLocality: Komagdalen, Bjørnskaret; verbatimLatitude: 70.1; verbatimLongitude: 29.7; verbatimCoordinateSystem: decimal degrees; verbatimSRS: WGS84; Identification: identifiedBy: J. Kjaerandsen; Event: eventDate: 2009-7-1/14; Record Level: collectionCode: TZS

Type status: Other material. Occurrence: recordedBy: K. Müller; individualCount: 1; sex: male; Taxon: genus: Boletina; specificEpithet: hyperborea; scientificNameAuthorship: Salmela; Location: country: Sweden; stateProvince: Torne Lappmark; verbatimLocality: Kiruna, Abisko; verbatimLatitude: 68.3; verbatimLongitude: 18.8; verbatimCoordinateSystem: decimal degrees; verbatimSRS: WGS84; Identification: identifiedBy: J. Kjaerandsen; Event: eventDate: 1976-6-23/30; Record Level: collectionCode: TZS

Description

Head dark brown, mouthparts brown. Palpomeres light-brown. Scape and pedicel dark-brown, 1st flagellomere light brown, other flagellomeres brown. Scutum brown, rather densely covered by light setae. Pleura brown, mediotergite, laterotergite, anepimeron, anepisternum and preepisternum glabrous. Coxae, femora and tibiae yellow, trochanters infuscated, tarsomeres brown, claws black. Wing length 4.5 mm. Sc1, Sc2, Rs, ta, tb and M-stem bare, M1, M2, CuA1, CuA2 setose on ventral surface, stem of CuA bearing a few setae distally. Sc1 ending in costa slightly before Rs. Costa extending beyond tip of R5 only slightly (Fig. 7). Halteres pale. Abdominal tergites and sternites brown, bearing light hairs. 9th tergite brown, covered by long brownish setae. Cercus ca. 1.7 times wider than long, with five more or less regular combs (i.e. rows of dark-brown, equally long stout setae), total number of setae ca. 120-130 (Fig. 8b). Sternal submedian appendages of gonocoxites apically truncated, rather narrow and bulging medially (Fig. 8a). Inner branch of gonostylus long and narrow, pointed, bearing a black apical spine. Aedeagal complex rather long and narrow (Fig. 8c, e). Parameres long and thin, not exceeding tip of aedeagus, apically incurved (Fig. 8c, d, f). Basal part of parameres dark, apices hyaline. Parameral apodemes stout, in lateral view widest medially (Fig. 8c, d). Ejaculatory apodeme basally bilobed (Fig. 8e). Aedeagus narrowing apically, having a hyaline membrane around the apex. Aedeagus with bare or non-spinose ventrodistal sclerites, serving as attachment points to sternal submedian appendages of gonocoxites.

Diagnosis

Medium-sized Boletina belonging to a group of species around B. borealis Zetterstedt. Wings and abdomen unpatterned. Sternal submedian appendages of gonocoxites bulging medially. Parameres rather long and thin, apically incurved, bare. Parameral apodemes are wide in lateral view and the aedeagus is coated by a transparent membrane. The species is superficially similar to B. hymenophalloides Sasakawa & Kimura; that species is characterized by 1) wide and apically spinulose parameres, their apices reaching the tip of the aedeagus, 2) a more narrow aedeagus and 3) a more extensive membrane around the aedeagus. It is most likely that B. hymenophalloides is not closely related to B. borealis and similar-looking species.

Etymology

Hyperborea (an noun in apposition) is taken from the Greek mythology, meaning the far north.

Distribution

Northern parts of Fennoscandia (Finland, Norway, Sweden) and Canada. In Fennoscandia the species have been observed from the northern boreal zone and from the subarctic ecoregion. In Canada it has been observed from the Ogilvie Mountains in the Yukon territory, which is in the subarctic ecoregion.

Ecology

The collecting sites are boreal forests and alpine wetlands. Joutenoja and Värriö are headwater streams, characterized by groundwater seepages and surrounded by coniferous forests. Toskaljärvi is an oroarctic, alpine sloping rich-fen, dominated by brown mosses.