Revision of the Exechia parva group (Diptera: Mycetophilidae) Author Lindemann, Jon Peder https://orcid.org/0000-0001-6001-7910 UiT - The Arctic University of Norway, Tromso, Norway jon.p.lindemann@uit.no Author Soli, Geir https://orcid.org/0000-0001-5301-6995 Natural History Museum, Oslo, Norway geir.soli@nhm.uio.no Author Kjaerandsen, Jostein https://orcid.org/0000-0002-3104-073X UiT - The Arctic University of Norway, Tromso, Norway jostein.kjarandsen@uit.no text Biodiversity Data Journal 2021 2021-09-24 9 67134 67134 http://dx.doi.org/10.3897/BDJ.9.e67134 journal article http://dx.doi.org/10.3897/BDJ.9.e67134 1314-2828-9-e67134 A1151C0727B74F31BC4B6809DA6F87CD 54EEB1B3D94E5239B847CC1AD9587A36 Exechia sphaerata Lindemann sp. n. Materials Type status: Holotype . Occurrence : catalogNumber: BIOUG03526-D01 ; recordedBy: BIOBus 2012 ; individualCount: 1 ; sex: male ; lifeStage: adult ; preparations: Pinned ; Location : country: Canada ; stateProvince: Alberta ; locality: Banff National Park , Storm Mountain , Adjacent to train track and Bow River ; verbatimElevation: 1462 m ; decimalLatitude: 51.282 ; decimalLongitude: -115.944 ; Event : samplingProtocol: Intercept Trap ; eventDate: 2012-06-20 ; habitat: Forest; fieldNotes: 1 Intercept Trap |mostly cloudy and 16C when site was dismantled|low alpine dry slope, temperate forest; Record Level: institutionCode: CBG Type status: Paratype . Occurrence : catalogNumber: BIOUG09297-H08 ; recordedBy: BIOBus 2012 ; individualCount: 1 ; sex: female ; lifeStage: adult ; preparations: Pinned ; Location : country: Canada ; stateProvince: Alberta ; locality: Jasper National Park , Pocahontas Campground ; verbatimElevation: 1131 m ; locationRemarks: Site C 21; decimalLatitude: 53.195 ; decimalLongitude: -117.914 ; Event : samplingProtocol: Pan Trap ; eventDate: 2012-07-21 ; habitat: Forest ; fieldNotes: 10 pan traps |overcast|16C|birch and spruce forest on a slope, lots of fallen logs; Record Level : institutionCode: CBG Type status: Paratype . Occurrence : catalogNumber: BIOUG06332-G11 ; recordedBy: BIOBus 2012 ; individualCount: 1 ; sex: male ; lifeStage: adult ; preparations: Pinned ; Location : country: Canada ; stateProvince: Alberta ; locality: Banff National Park , Baker Creek picnic area, Adjacent to hydro line ; verbatimElevation: 1500 m ; decimalLatitude: 51.35 ; decimalLongitude: -116.063 ; Event : samplingProtocol: Sweep Net ; eventDate: 2012-07-27 ; habitat: Forest ; fieldNotes: standard 5 min sweeping (3), 4 sweepers|partly cloudy| Mature forest , lodgepole pine, temperate forest; Record Level : institutionCode: CBG Type status: Paratype . Occurrence : catalogNumber: BIOUG13692-D07 ; recordedBy: BIObus 2013 ; individualCount: 1 ; sex: male ; lifeStage: adult ; preparations: Pinned ; Location : country: Canada ; stateProvince: New Brunswick ; locality: Fundy National Park , Maple Grove Trail ; verbatimElevation: 212 m ; decimalLatitude: 45.59 ; decimalLongitude: -64.985 ; Event : samplingProtocol: Intercept Trap ; eventDate: 2013-05-30 ; habitat: Forest; fieldNotes: 1 Intercept Trap |overcast|hardwood forest, maple stand; Record Level: institutionCode: CBG Type status: Paratype . Occurrence : catalogNumber: BIOUG27489-F12 ; recordedBy: BIObus 2014 ; individualCount: 1 ; sex: male ; lifeStage: adult ; preparations: Pinned ; Location : country: Canada ; stateProvince: Yukon Territory ; locality: Kluane National Park and Reserve , Dezadeash River Trail ; verbatimElevation: 582 m ; decimalLatitude: 60.748 ; decimalLongitude: -137.513 ; Event : samplingProtocol: Intercept trap ; eventDate: 2014-07-24 ; habitat: Wetland; fieldNotes: 1 Intercept Trap |cold and overcast on day of collection|Wetland with grasses and shrubs; Record Level: institutionCode: CBG Type status: Paratype . Occurrence : catalogNumber: BIOUG13825-B01 ; recordedBy: BIObus 2013 ; individualCount: 1 ; sex: female ; lifeStage: adult ; preparations: Pinned ; Location : country: Canada ; stateProvince: New Brunswick ; locality: Fundy National Park , Maple Grove Trail ; verbatimElevation: 212 m ; decimalLatitude: 45.59 ; decimalLongitude: -64.985 ; Event : samplingProtocol: Sweep Net ; eventDate: 2013-05-28 ; habitat: Forest; fieldNotes: 5 min sweep x4 collectors (3)|sunny and clear skies|hardwood forest, maple stand; Record Level: institutionCode: CBG Type status: Paratype . Occurrence : catalogNumber: BIOUG09168-H01 ; recordedBy: BIOBus 2012 ; individualCount: 1 ; sex: male ; lifeStage: adult ; preparations: Pinned ; Location : country: Canada ; stateProvince: Alberta ; locality: Jasper National Park , Pocahontas Campground ; verbatimElevation: 1131 m ; locationRemarks: Site C 21; decimalLatitude: 53.195 ; decimalLongitude: -117.914 ; Event : samplingProtocol: Intercept Trap ; eventDate: 21-Jul-2012 ; habitat: Forest ; fieldNotes: 1 intercept trap |overcast|16C|birch and spruce forest on a slope, lots of fallen logs; Record Level : institutionCode: CBG Type status: Paratype . Occurrence : catalogNumber: BIOUG09164-G05 ; recordedBy: BIOBus 2012 ; individualCount: 1 ; sex: male ; lifeStage: adult ; preparations: Pinned ; Location : country: Canada ; stateProvince: Alberta ; locality: Jasper National Park , Pocahontas Campground ; verbatimElevation: 1131 m ; locationRemarks: Site C 21; decimalLatitude: 53.195 ; decimalLongitude: -117.914 ; Event : samplingProtocol: Intercept Trap ; eventDate: 21-Jul-2012 ; habitat: Forest ; fieldNotes: 1 intercept trap |overcast|16C|birch and spruce forest on a slope, lots of fallen logs; Record Level : institutionCode: CBG Type status: Paratype . Occurrence : catalogNumber: BIOUG06581-B12 ; recordedBy: BIOBus 2012 ; individualCount: 1 ; sex: female ; lifeStage: adult ; preparations: Pinned ; Location : country: Canada ; stateProvince: Saskatchewan ; locality: Prince Albert National Park , Narrows Peninsula Trail ; verbatimElevation: 530 m ; decimalLatitude: 53.9872 ; decimalLongitude: -106.282 ; Event : samplingProtocol: Intercept Trap ; eventDate: 14-Jul-2012 ; habitat: Forest; fieldNotes: 1 intercept trap |partly cloudy|24C|white spruce and poplar forest; Record Level: institutionCode: CBG Type status: Paratype . Occurrence : catalogNumber: BIOUG06898-F06 ; recordedBy: BIOBus 2012 ; individualCount: 1 ; sex: male ; lifeStage: adult ; preparations: Pinned ; Location : country: Canada ; stateProvince: Alberta ; locality: Elk Island National Park , Elk Island Parkway ; verbatimElevation: 729 m ; decimalLatitude: 53.663 ; decimalLongitude: -112.823 ; Event : samplingProtocol: Intercept Trap ; eventDate: 03-Jul-2012 ; habitat: Forest; fieldNotes: 1 intercept trap |overcast|14C on end date|black spruce stand; Record Level: institutionCode: CBG Type status: Paratype . Occurrence : catalogNumber: BIOUG09340-D09 ; recordedBy: BIOBus 2012 ; individualCount: 1 ; sex: male ; lifeStage: adult ; preparations: Pinned ; Location : country: Canada ; stateProvince: Alberta ; locality: Jasper National Park , Pocahontas Campground ; verbatimElevation: 1131 m ; locationRemarks: Site C 21; decimalLatitude: 53.195 ; decimalLongitude: -117.914 ; Event : samplingProtocol: Pan Trap ; eventDate: 21-Jul-2012 ; habitat: Forest ; fieldNotes: 10 pan traps |overcast|16C|birch and spruce forest on a slope, lots of fallen logs; Record Level : institutionCode: CBG Type status: Paratype . Occurrence : catalogNumber: BIOUG09340-B10 ; recordedBy: BIOBus 2012 ; individualCount: 1 ; sex: female ; lifeStage: adult ; preparations: Pinned ; Location : country: Canada ; stateProvince: Alberta ; locality: Jasper National Park , Pocahontas Campground ; verbatimElevation: 1131 m ; locationRemarks: Site C 21; decimalLatitude: 53.195 ; decimalLongitude: -117.914 ; Event : samplingProtocol: Pan Trap ; eventDate: 21-Jul-2012 ; habitat: Forest ; fieldNotes: 10 pan traps |overcast|16C|birch and spruce forest on a slope, lots of fallen logs; Record Level : institutionCode: CBG Type status: Paratype . Occurrence : catalogNumber: BIOUG13692-A05 ; recordedBy: BIObus 2013 ; individualCount: 1 ; sex: female ; lifeStage: adult ; preparations: Pinned ; Location : country: Canada ; stateProvince: New Brunswick ; locality: Fundy National Park , Maple Grove Trail ; verbatimElevation: 212 m ; decimalLatitude: 45.59 ; decimalLongitude: -64.985 ; Event : samplingProtocol: Intercept Trap ; eventDate: 30-May-2013 ; habitat: Forest; fieldNotes: 1 Intercept Trap |overcast|hardwood forest, maple stand; Record Level: institutionCode: CBG Description Male (n = 8): Body length 2.7-3.6 mm. Wing length 2.3-2.9 mm. Colouration (Dry specimen). Head brown to dark brown; face and clypeus dark brown; labellum yellow to pale brown; palpus yellow. Antenna with scape and pedicel yellow; flagellum pale brown to dark brown. Thorax with scutum and lateral sclerites brown; propleura brown to dark brown; halteres whitish-yellow to yellow. Legs whitish-yellow to yellow. Abdomen dark brown, sometimes with a pale area covering basolateral part of tergite III. Terminalia yellow. Head . Frons, vertex and clypeus covered with pale setae. Antenna (n = 6) 1.8-2.0 times as long as length from vertex to ventral margin of clypeus; flagellomeres slightly longer than broad, with sixth flagellomere (n = 6) 1.0-1.1 times as long as wide. Thorax . Scutum covered with pale setae. Legs . Fore leg with tibia (n = 5) 1.0-1.05 times as long as first tarsomere. Mid-tibia with (n = 5) 16-19 anterior, (n = 5) 3-4 posterodorsal, (n = 5) 5-7 posterior and (n = 5) 1-3 posteroventral bristles. Hind tibia with 7-9 anterodorsal, 4 posterodorsal and 3-6 posterior bristles. Wings . Vein r-m (n = 6) 2.1-2.4 times longer than stem of M-fork. Abdomen. Tergites covered with pale setae. Terminalia (Fig. 37 a , b , c ). Each part of divided tergite IX with about 7-8 setae, most apical seta stout. GL with length 0.51-53 of gonocoxite width; apico-internal margin slightly angled exteriorly; basal third covered with setae; apex with 4 setae. Aedaegal guides short with acute apex. Hypandrium covered with 9-12 setae, with apical pair reaching two-thirds to three-fourths of GL (Fig. 37 a , b ). Hypandrial lobe with each branch slender, evenly tapered. Gonostylus (Fig. 37 c ) with DB 1.9-2.1 times longer than broad, distinctly curved interiorly, apical part broad, apex rounded; evenly covered with setae on dorsal side, except on most apical part; external margin evenly rounded with row of 5 elongated setae. VB round, with 2 small setae. IB apically with 1 seta close to apex and pair of setae one-third from apex. MB apically acute, with 1 seta close to base. Female (n =): Body length 2.9-3.7 mm. (n = 3) Wing length 2.5-2.9 mm. Colouration (Dry specimen). Head, face and clypeus dark brown; labellum and palpus yellow. Antenna with scape and pedicel yellow; flagellum brown. Thorax with scutum and propleura brown; lateral sclerites dark brown; halteres whitish-yellow. Legs yellow. Abdomen brown, tergites III-VI with lateral pale areas. Terminalia yellow. Head . Frons, vertex and clypeus covered with pale setae. Antenna (n = 3) 1.75-1.9 times as long as length from vertex to ventral margin of clypeus; flagellomeres quadrate, with sixth flagellomere as long as broad. Thorax . Scutum covered with pale setae. Legs . Fore leg with tibia (n = 4) 1.0-1.05 times as long as first tarsomere. Mid-tibia with (n = 3) 16-19 anterior, (n = 1) 4 posterodorsal, (n = 1) 5 posterior and (n = 1) 2 posteroventral bristles. Hind tibia with (n = 3) 7-9 anterodorsal, (n = 3) 4-5 posterodorsal and (n = 3) 4-5 posterior bristles. Wings . Vein r-m (n = 3) 2.1-2.4 times longer than stem of M-fork. Abdomen. Tergites covered with pale setae. Terminalia (Fig. 37 d , e , f ). Cerci with apical segment 0.6 times as long as basal segment. Tergite VIII with apicolateral margin forming distinctly protruding angle (Fig. 37 d ). Sternite VII with apex very slightly protruding. Sternite VIII (Fig. 37 e ) with hypogynal valves separated by narrow cleft with depth about one-third of sternite VIII length; apical seta 0.55-0.6 of sternite VIII length. Gonapophysis IX (Fig. 37 f ) with basolateral part expanding in obtuse angle; spermathecal eminence trilobed, in ventral view appearing cross-shaped; apically with 4 small setae. Diagnosis Distinguished from E. repandoides in having the dorsal branch of the gonostylus with apex rounded (Fig. 37 c ), apicoventrally without a short angular projection, in combination with the hypandrium with 9-12 setae (Fig. 37 a , b ); from E. brevilobata and E. breviflagellata in having the antennae 1.8-2.0 times as long as length from vertex to ventral margin of clypeus, in combination with the dorsal gonostylus branch without a distinct apical lobe (Fig. 37 c ); from other species in the E. parva group in having the dorsal gonostylus branch short and rounded (Fig. 37 c ), in combination with apico-internal margin of the gonocoxal lobe slightly angled exteriorly (Fig. 37 a , b ). Etymology From Latin sphaera , sphere, relating to the shape of the dorsal branch of the gonostylus. Distribution Nearctic, Canada (Fig. 13 ) Biology Adults collected in different types of forest and wetland habitats.