Exechia spatulata 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 spatulata Lindemann sp. n.

Materials

Type status: Holotype. Occurrence: catalogNumber: TSZD-JKJ-111444 ; recordedBy: Jarl Birkeland; individualCount: 1; sex: male; lifeStage: adult; preparations: Pinned ; Location : country: Norway; county: Rogaland; municipality: Sokndal ; locality: Skittmyr ; decimalLatitude: 58.350488; decimalLongitude: 6.3054945; Event : samplingProtocol: Malaise trap; eventDate: 2020-05-21 / 2020-06-11; Record Level: collectionID: TMU-JKJ-COL-001514; institutionCode: TMU Type status: Paratype. Occurrence: catalogNumber: TSZD-JKJ-103590 ; occurrenceRemarks: TMU-JKJ fieldwork; 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: Sør-Varanger; locality: Gjokbekken , Pasvik ; verbatimElevation: 72 m; locationRemarks: SLAM 1; decimalLatitude: 69.1522; decimalLongitude: 29.1516; Event : samplingProtocol: SLAM trap; eventDate: 2017-08-25; Record Level: collectionID: TMU-JKJ-COL-000538; institutionCode: TMU Type status: Paratype. Occurrence: catalogNumber: TSZD-JKJ-107937 ; occurrenceRemarks: ADB - M&M project; recordedBy: Kai Berggren; individualCount: 1; sex: male; lifeStage: adult; preparations: Pinned , with genitalia in glycerine in separate microvial; Location : country: Norway; county: Vest-Agder; municipality: Kristiansand ; locality: Nedre Jegersbergvann ; verbatimElevation: 21 m; locationRemarks: MT 3, at lake; decimalLatitude: 58.169; decimalLongitude: 8; Event : samplingProtocol: Malaise trap; eventDate: 2019-06-29; Record Level: collectionID: TMU-JKJ-COL-001099; institutionCode: TMU Type status: Paratype. Occurrence: catalogNumber: TSZD-JKJ-107987 ; occurrenceRemarks: Gift from collector; recordedBy: J. Birkeland; individualCount: 1; sex: male; lifeStage: adult; preparations: Pinned, with genitalia in glycerine in separate microvial; Location: country: Norway; county: Rogaland; municipality: Sokndal ; locality: Skittmyr ; verbatimElevation: 22 m; decimalLatitude: 58.351; decimalLongitude: 6.306; Event : samplingProtocol: Malaise trap; eventDate: 2019-10-02; Record Level: collectionID: TMU-JKJ-COL-001079; institutionCode: TMU Type status: Paratype. Occurrence: catalogNumber: TSZD-JKJ-107932 ; occurrenceRemarks: Depth: 7.5 | ADB - M&M project; recordedBy: K. Berggren; individualCount: 1; sex: male; lifeStage: adult; preparations: Pinned, with genitalia in glycerine in separate microvial; Location: country: Norway; county: Vest-Agder; municipality: Kristiansand ; locality: Nedre Jegersbergvann ; verbatimElevation: 21 m; locationRemarks: MT 3, at lake; decimalLatitude: 58.169; decimalLongitude: 8; Event : samplingProtocol: Malaise trap; eventDate: 2019-08-28; Record Level: collectionID: TMU-JKJ-COL-001101; institutionCode: TMU Type status: Paratype. Occurrence: catalogNumber: TSZD-JKJ-111547 ; recordedBy: H. Andersson; individualCount: 1; sex: male; lifeStage: adult; preparations: Slide ; Location : country: Sweden; county: Norrbotn ; municipality: Luleå; locality: Ranea , Hoegsoen , Hoegsoefjaerden ; Event : eventDate: 1965-09-06; Record Level: institutionCode: TMU Type status: Paratype. Occurrence: catalogNumber: SPM-060717 ; recordedBy: M. Söderlund; individualCount: 1; sex: male; lifeStage: adult; preparations: Pinned , with genitalia in glycerine in separate microvial; Location : country: Sweden; county: Vaestra Goetaland ; municipality: Ale ; locality: Kollanda mosse ; locationRemarks: MT 2; decimalLatitude: 57.940833; decimalLongitude: 12.249444; Event: samplingProtocol: Malaise trap; eventDate: 1995-09-11 / 1995-09-20; Record Level: institutionCode: TMU Type status: Paratype. Occurrence: catalogNumber: SPM-060720 ; recordedBy: M. Söderlund; individualCount: 1; sex: male; lifeStage: adult; preparations: Pinned , with genitalia in glycerine in separate microvial; Location : country: Sweden; county: Vaestra Goetaland ; municipality: Ale ; locality: Kollanda mosse ; locationRemarks: MT 2; decimalLatitude: 57.940833; decimalLongitude: 12.249444; Event: samplingProtocol: Malaise trap; eventDate: 1995-10-01 / 1995-10-10; Record Level: collectionID: COL-009616; institutionCode: TMU Type status: Paratype. Occurrence: catalogNumber: SPM-036986 ; recordedBy: G. Nilsson; individualCount: 1; sex: male; lifeStage: adult; preparations: Pinned , with genitalia in glycerine in separate microvial; Location : country: Sweden; county: Västmanland; municipality: Västerås; locality: Solbacken ; decimalLatitude: 59.517222; decimalLongitude: 16.740000; Event: samplingProtocol: Malaise trap; eventDate: 1990-08-25 / 1990-09-09; Record Level: collectionID: COL-008186; institutionCode: TMU Type status: Paratype. Occurrence: catalogNumber: TSZD-JKJ-111490 ; recordedBy: J. Birkeland; individualCount: 1; sex: male; lifeStage: adult; preparations: Pinned; Location: country: Norway; county: Rogaland; municipality: Sokndal ; locality: Skittmyr 2 ; decimalLatitude: 58.3501773; decimalLongitude: 6.3055563; Event : samplingProtocol: Malaise trap; eventDate: 2020-08-08 / 2020-09-05; Record Level: collectionID: TMU-JKJ-COL-001525; institutionCode: TMU Type status: Paratype. Occurrence: catalogNumber: TSZD-JKJ-111221 ; recordedBy: J. Kjærandsen; individualCount: 1; sex: male; lifeStage: adult; preparations: Pinned ; Location : country: Norway; county: Trřndelag; municipality: Oppdal ; locality: Dovre , Gronbakken ; decimalLatitude: 62.278890; decimalLongitude: 9.59833; Event: samplingProtocol: Sweep net; eventDate: 2020-07-07; Record Level: collectionID: TMU-JKJ-COL-001481; institutionCode: TMU Type status: Paratype. Occurrence: catalogNumber: TSZD-JKJ-111439 ; recordedBy: J. Birkeland; individualCount: 1; sex: male; lifeStage: adult; preparations: Pinned; Location: country: Norway; county: Rogaland; municipality: Sokndal ; locality: Skittmyr 2 ; decimalLatitude: 58.3501773; decimalLongitude: 6.3055563; Event : samplingProtocol: Malaise trap; eventDate: 2020-07-10 / 2020-08-08; Record Level: collectionID: TMU-JKJ-COL-001524; institutionCode: TMU

Description

Male (n = 12): Body length 2.9-3.2 mm. Wing length 2.4-2-5 mm. Colouration (Dry specimen). Head, face and clypeus dark brown; labellum dark brown; palpus yellow. Antenna with scape and pedicel yellow; flagellum dark brown, basal part of first flagellomere pale. Thorax with scutum, lateral sclerites and propleura dark brown; halteres whitish-yellow. Legs yellow. Abdomen dark brown. Terminalia brown. Head. Vertex, frons and clypeus covered with pale setae. Antenna 1.78 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 (n = 3). Fore leg with tibia as long as first tarsomere. Mid-tibia with 20 anterior, 3 posterodorsal, 4 posterior and 2 posteroventral bristles. Hind tibia with 6 anterodorsal, 5 posterodorsal and 3 posterior bristles. Wings. Vein r-m 2.8 times longer than stem of M-fork. Abdomen. Tergites covered with pale setae. Terminalia (n = 4, Fig. 36 a, b). Each part of divided tergite IX with about 3-4 setae, most apical seta stout. GL with length 0.6-0.75 of gonocoxite width (Fig. 36 a, b); apico-internal margin slightly angled exteriorly; basal third covered with setae; apex with 3 setae. Aedaegal guides short and acute. Hypandrium covered with 10-12 setae, with apical pair reaching two thirds to three-fourths of GL (Fig. 36 a, b). Hypandrial lobe with each part slender, apical half slightly widened. Gonostylus (Fig. 36 c) with DB elongate, about 3.52 times longer than broad, virtually straight or very slightly curved interiorly, apical lobe distinctly spathulate, apex rounded; dorsal side evenly covered with setae, except on most apical part; external margin almost straight, not forming any angle, with row of 4 elongate setae. VB 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. longilobata in having the dorsal gonostylus branch apically spathulate and about 3.5 times longer than broad (Fig. 36 c), the hypandrium less setose with 10-12 setae (Fig. 36 a, b), each part of the hypandrial lobe with apical half only slightly widened and the gonocoxal lobe length 0.6-0.75 the gonocoxite width (Fig. 36 c); from other species in the E. parva group in having the dorsal branch spathulate and more elongated (Fig. 36 c), in combination with the gonocoxal lobes with apico-internal margin slightly angled exteriorly (Fig. 36 a).

Etymology

From Latin spatula, flat piece, relating to the the apical shape of the dorsal branch of the gonostylus.

Distribution

West Palaearctic, Norway, Sweden (Fig. 15 )

Biology

Unknown.

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).