Exechia neorepanda Lindemann, 2021

Lindemann, Jon Peder, Soli, Geir & Kjaerandsen, Jostein, 2021, Revision of the Exechia parva group (Diptera: Mycetophilidae), Biodiversity Data Journal 9, pp. 67134-67134 : 67134

Exechia neorepanda Lindemann sp. n.

Materials

Type status: Holotype. Occurrence: catalogNumber: TSZD-JKJ-103405 ; recordedBy: Jostein Kjærandsen & Martin T. Dahl; individualCount: 1; sex: male; lifeStage: adult; preparations: Pinned, with genitalia in glycerine in separate microvial; Location: country: Norway; county: Finnmark; municipality: Alta ; locality: Mattisdalen indre V ; locationRemarks: WT-6; decimalLatitude: 69.8267; decimalLongitude: 22.8493; Event : samplingProtocol: Window trap; eventDate: 2017-07-10; Record Level: institutionCode: TMU Type status: Paratype. Occurrence: catalogNumber: TSZD-JKJ-102234 ; recordedBy: Bo W. Svensson et al.; individualCount: 1; sex: male; lifeStage: adult; preparations: Pinned, with genitalia in glycerine in separate microvial; Location: country: Sweden; county: Skåne; municipality: Malmö; locality: Limhamns kalkbrott ; verbatimElevation: - 40 m; decimalLatitude: 55.5681; decimalLongitude: 12.9241; Event : samplingProtocol: Malaise Trap; eventDate: 2011-12-16; habitat: Limestone quarry; Record Level: institutionCode: TMU Type status: Paratype. Occurrence: catalogNumber: TSZD-JKJ-101379 ; recordedBy: J. Kjærandsen & M. Torp; individualCount: 1; sex: male; lifeStage: adult; preparations: Pinned, with genitalia in glycerine in separate microvial; Location: country: Norway; county: Troms; municipality: Bardu ; locality: Kjeleelvdalen , Rohkunborri NP ; locationRemarks: MT-2; decimalLatitude: 68.588; decimalLongitude: 18.584; Event : samplingProtocol: Malaise Trap; eventDate: 2015-10-08; Record Level: institutionCode: TMU Type status: Paratype. Occurrence: catalogNumber: TSZD-JKJ-101398 ; recordedBy: J. Kjærandsen & M. Torp; individualCount: 1; sex: male; lifeStage: adult; preparations: Pinned, with genitalia in glycerine in separate microvial; Location: country: Norway; county: Troms; municipality: Bardu ; locality: Kjeleelvdalen , Rohkunborri NP ; locationRemarks: MT-2; decimalLatitude: 68.588; decimalLongitude: 18.584; Event : samplingProtocol: Malaise Trap; eventDate: 2015-10-08; Record Level: institutionCode: TMU Type status: Paratype. Occurrence: catalogNumber: TSZD-JKJ-101840 ; recordedBy: Jostein Kjærandsen & Martin T. Dahl; individualCount: 1; sex: male; lifeStage: adult; preparations: Pinned, with genitalia in glycerine in separate microvial; Location: country: Norway; county: Troms; municipality: Bardu ; locality: Kjeleelvdalen , Rohkunborri NP ; locationRemarks: MT-2; decimalLatitude: 68.588; decimalLongitude: 18.584; Event : samplingProtocol: Malaise Trap; eventDate: 2015-09-04; Record Level: institutionCode: TMU Type status: Paratype. Occurrence: catalogNumber: TSZD-JKJ-100510 ; recordedBy: J. Kjærandsen; individualCount: 1; sex: male; lifeStage: adult; preparations: Pinned, with genitalia in glycerine in separate microvial; Location: country: Norway; county: Troms; municipality: Målselv; locality: Dividalen , Velstjonna SE ; decimalLatitude: 68.996; decimalLongitude: 19.489; Event : samplingProtocol: Interception trap; eventDate: 2014-11-04; Record Level: institutionCode: TMU Type status: Paratype. Occurrence: catalogNumber: TSZD-JKJ-102591 ; recordedBy: J. Kjærandsen; individualCount: 1; sex: male; lifeStage: adult; preparations: Pinned, with genitalia in glycerine in separate microvial; Location: country: Norway; county: Troms; municipality: Tromsø; locality: Nakkemyren at Nakkeelva ; verbatimElevation: 154; decimalLatitude: 69.6022; decimalLongitude: 19.5847; Event : samplingProtocol: Malaise trap; eventDate: 2016-09-03; Record Level: collectionID: TMU-JKJ-COL-000432; institutionCode: TMU Type status: Paratype. Occurrence: catalogNumber: TSZD-JKJ-111221 ; recordedBy: J. Kjærandsen; individualCount: 1; sex: male; lifeStage: adult; preparations: Pinned, with genitalia in glycerine in separate microvial; Location: country: Norway; county: Sør-Trøndelag; municipality: Oppdal ; locality: Dovre , Gronbekken ; verbatimElevation: 920; decimalLatitude: 62.279; decimalLongitude: 9.598; Event : samplingProtocol: Sweep net; eventDate: 2020-07-07; Record Level: collectionID: TMU-JKJ-COL-001481; institutionCode: TMU Type status: Paratype. Occurrence: catalogNumber: TSZD-JPL-100101 ; recordedBy: Jon Peder Lindemann; individualCount: 1; sex: male; lifeStage: adult; preparations: Pinned ; Location : country: Norway; county: Troms; municipality: Tromsø; locality: Tromsoya , Folkeparken ; decimalLatitude: 69.634975; decimalLongitude: 18.903577; Event : samplingProtocol: hand picked; eventDate: 2021-04-04; habitat: in stems of Heracleum persicum; Record Level: institutionCode: TMU Type status: Paratype. Occurrence: catalogNumber: TSZD-JPL-100103 ; recordedBy: Jon Peder Lindemann; individualCount: 1; sex: male; lifeStage: adult; preparations: Pinned ; Location : country: Norway; county: Troms; municipality: Tromsø; locality: Tromsoya , Folkeparken ; decimalLatitude: 69.634975; decimalLongitude: 18.903577; Event : samplingProtocol: hand picked; eventDate: 2021-04-04; habitat: in stems of Heracleum persicum; Record Level: institutionCode: TMU Type status: Paratype. Occurrence: catalogNumber: TSZD-JPL-100105 ; recordedBy: Jon Peder Lindemann; individualCount: 1; sex: male; lifeStage: adult; preparations: Pinned ; Location : country: Norway; county: Troms; municipality: Tromsø; locality: Tromsoya , Folkeparken ; decimalLatitude: 69.634975; decimalLongitude: 18.903577; Event : samplingProtocol: hand picked; eventDate: 2021-04-04; habitat: in stems of Heracleum persicum; Record Level: institutionCode: TMU

Description

Male (n = 11, Fig. 1): Body length (n = 7) 3.2-3.6 mm. Wing length 2.7-3.0 mm. Colouration (Dry specimen). Head, face and clypeus dark brown; labellum yellow to brown; palpus yellow. Antenna with scape and pedicel yellow; flagellum pale brown to dark brown, basal half of first flagellomere pale. Thorax and lateral sclerites dark brown; propleura brown to dark brown; halteres yellow to whitish-yellow. Legs yellow. Abdomen dark brown. Terminalia yellow to brown. Head. Vertex, frons and clypeus covered with pale setae. Antenna (n = 6) 1.7-1.95 times as long as length from vertex to ventral margin of clypeus; flagellomeres quadrate or longer than broad, with sixth flagellomere 1.0-1.3 times as long as wide. Thorax. Scutum covered with pale setae. Legs. Fore leg with tibia (n = 6) 0.9-1.0 times as long as first tarsomere. Mid-tibia with 18-22 anterior, 3-4 posterodorsal, (n = 6) 4-6 posterior and (n = 6) 2-3 posteroventral bristles. Hind tibia with (n = 5) 6-7 anterodorsal, (n = 5) 4-5 posterodorsal and 2-4 posterior bristles. Wings. Vein r-m (n = 6) 1.83-2.8 times longer than stem of M-fork. Abdomen. Tergites covered with pale setae. Terminalia (n = 7, Fig. 26). Each part of divided tergite IX with 3-4 setae, most apical seta stout. GL with length 0.53-0.63 of gonocoxite width, apico-internal margin slightly angled exteriorly, basal third covered with setae, apex with 4-5 setae (Fig. 26 a, b). Aedaegal guides short with acute apex (Fig. 26 a, b). Hypandrium covered with 11-13 setae, with the apical pair reaching about two-thirds of the GL (Fig. 26 a, b). Each part of hypandrial lobe with apical half slightly widened. Gonostylus (Fig. 26 c) with DB 2.3-2.5 times longer than broad, slightly curved interiorly, apical lobe well defined, apex rounded; dorsal side evenly covered with setae, except on most apical part; external margin evenly rounded, with row of 4-5 elongate setae. VB apically acute, with 2 small setae. IB apically with 1 seta close to apex and pair of setae one-third from apex. MB apex acute, with 1 seta close to the base.

Female: Unknown.

Diagnosis

Distinguished from E. curvata , E. repanda and E. subrepanda in having the dorsal gonostylus branch only slightly curved, the external margin without a distinct angle and with the external row of setae covering one-third to half of the total dorsal gonostylus branch length (Fig. 26 c); from other species in the E. parva group in having the dorsal branch 2.3-2.5 times longer than broad (Fig. 26 c), in combination with the gonocoxal lobe covered with setae on basal half or less (Fig. 26 a, b), with the apico-internal margin slightly angled exteriorly (Fig. 26 a, b).

Etymology

From Greek neos, new and Exechia repanda , relating to the resemblance of the species to E. repanda . The name indicates that the species has commonly been identified as E. repanda .

Distribution

West Palaearctic, Austria, Belgium, Britain, Corsica, Czech Republic, Denmark, Estonia, Finland, France, Germany, Hungary, Italy, Norway, Poland, Russia, Sweden, Switzerland, The Netherlands (Fig. 15 , Chandler 2005)

Biology

Reared from fruitbody of Lyophyllum loricatum (Fr.) Kühner, Mycena galericulata (Scop.) Gray, Kuehneromyces mutabilis (Schaeff.) Singer & A.H.Sm., Gyromitra esculenta (Pers.) Fr., Inocybe goodeyi Gillet, and Calocybe gambosa (Fr.: Fr.) Donk ( Dely-Draskovits 1974, Ševčík 2006, Chandler 2010, Jakovlev 1994).

Adults have been reported hibernating in hollow, usually broken umbelliferous stems ( Väisänen 1981, Kurina 1997) and we have also collected adults from broken stems of Heracleum persicum Desf. ex Fisch. in Tromsø, Norway during the winter season (Fig. 1 c, d).

Taxon discussion

This Palaearctic species is morphologically very close to the two Nearctic species, E. repanda and E. subrepanda and species determination should be conducted with care or confirmed by their distinctly-separated DNA barcodes and BINs. We assume that previous records of E. repanda in the West-Palaearctic Region constitute what we define as E. neorepanda sp. n.

Figures

Figure 15. Distribution map of species in the E. parva group occurring in the West Palaearctic Region, based on localities from studied material, type material and DNA-barcoded material. Different species are represented by individual colours. Altitudes are indicated in shades from grey (lowland) to white (mountains).