Hydrophorus callosoma Frey, 1915

Kahanpaeae, Jere, 2013, A second update to the checklist of Finnish long-legged flies (Diptera: Dolichopodidae), with a re-evaluation of the status of Hydrophoruscallosoma Frey, 1915, Biodiversity Data Journal 1, pp. 976-976 : 976

Classification: Dolichopodidae Rank: SpeciesType of treatment: Redescription or species observationextantHabitat: terrestrialRoot classification: 8

Hydrophorus callosoma Frey, 1915

Hydrophorus wahlbergi var. (?) callosoma Frey 1915: 65 stat. rev.

Hydrophorus albosignatus Ringdahl 1919: 16 syn. nov.

Materials

Occurrence: recordedBy: Wolter Hellén; individualCount: 1; sex: female; Taxon: scientificName: Hydrophoruscallosoma; originalNameUsage: Hydrophoruswahlbergivar.(?)callosoma Frey, 1915; namePublishedIn: Frey, R. (1915) Zur kenntnis der Dipterenfauna Finlands. III. Dolichopodidae. Acta Societatis pro Fauna et Flora Fennica 40, 1-80+3 pl. Available from: http://www.biodiversitylibrary.org/page/5571884.; order: Diptera; family: Dolichopodidae; scientificNameAuthorship: Frey, 1915; Location: country: Russia; stateProvince: Murmansk district; municipality: Kandalaksha; verbatimLocality: Kantalaks; decimalLatitude: 67.20; decimalLongitude: 32.40; geodeticDatum: WGS84; Identification: identifiedBy: Jere Kahanpää; Event: eventDate: 1913-06-28; Record Level: collectionID: http://id.luomus.fi/HR.110; institutionCode: MZH; collectionCode: Diptera Fennica; basisOfRecord: PreservedSpecimen

Occurrence: recordedBy: John Sahlberg; individualCount: 1; sex: female; Taxon: scientificName: Hydrophorusaltivagus; originalNameUsage: Hydrophoruswahlbergivar.(?)callosoma Frey, 1915; namePublishedIn: Frey, R. (1915) Zur kenntnis der Dipterenfauna Finlands. III. Dolichopodidae. Acta Societatis pro Fauna et Flora Fennica 40, 1-80+3 pl. Available from: http://www.biodiversitylibrary.org/page/5571884.; order: Diptera; family: Dolichopodidae; scientificNameAuthorship: Aldrich, 1911; Location: country: Russia; stateProvince: Republic of Karelia; municipality: Kem'; verbatimLocality: Kem; decimalLatitude: 64.96; decimalLongitude: 34.60; geodeticDatum: WGS84; Identification: identifiedBy: Jere Kahanpää; Event: eventDate: 1869-07-30; Record Level: collectionID: http://id.luomus.fi/HR.110; institutionCode: MZH; collectionCode: Diptera Fennica; basisOfRecord: PreservedSpecimen

Occurrence: recordedBy: Richard Frey; individualCount: 1; sex: male; Taxon: scientificName: Hydrophoruscallosoma; order: Diptera; family: Dolichopodidae; scientificNameAuthorship: Frey, 1915; Location: country: Finland; stateProvince: PPe; municipality: Hailuoto; locality: Kirkkolahti ; decimalLatitude: 65.00; decimalLongitude: 24.71; geodeticDatum: WGS84; coordinatePrecision: 3000; Identification: identifiedBy: Jere Kahanpää; Event: eventDate: 1947-07-16; Record Level: collectionID: http://id.luomus.fi/HR.110; institutionCode: MZH; collectionCode: Diptera Fennica; basisOfRecord: PreservedSpecimen

Occurrence: recordedBy: Richard Frey; individualCount: 35; sex: 15 males, 20 females; Taxon: scientificName: Hydrophoruscallosoma; order: Diptera; family: Dolichopodidae; scientificNameAuthorship: Frey, 1915; Location: country: Finland; stateProvince: PPe; municipality: Hailuoto; locality: Kirkkolahti ; decimalLatitude: 65.00; decimalLongitude: 24.71; geodeticDatum: WGS84; coordinatePrecision: 3000; Identification: identifiedBy: Jere Kahanpää; Event: eventDate: 1947-07-12; Record Level: collectionID: http://id.luomus.fi/HR.110; institutionCode: MZH; collectionCode: Diptera Fennica; basisOfRecord: PreservedSpecimen

Occurrence: recordedBy: Richard Frey; individualCount: 7; sex: 5 males, 2 females; Taxon: scientificName: Hydrophoruscallosoma; order: Diptera; family: Dolichopodidae; scientificNameAuthorship: Frey, 1915; Location: country: Finland; stateProvince: PPe; municipality: Hailuoto; locality: Kirkkolahti ; decimalLatitude: 65.00; decimalLongitude: 24.71; geodeticDatum: WGS84; coordinatePrecision: 3000; Identification: identifiedBy: Jere Kahanpää; Event: eventDate: 1947-07-11; Record Level: collectionID: http://id.luomus.fi/HR.110; institutionCode: MZH; collectionCode: Diptera Fennica; basisOfRecord: PreservedSpecimen

Occurrence: recordedBy: Ragnar Storå; individualCount: 2; sex: 1 male, 1 female; Taxon: scientificName: Hydrophoruscallosoma; order: Diptera; family: Dolichopodidae; scientificNameAuthorship: Frey, 1915; Location: country: Finland; stateProvince: KP; municipality: Pietarsaari; decimalLatitude: 63.690; decimalLongitude: 22.670; geodeticDatum: WGS84; coordinatePrecision: 1000; Identification: identifiedBy: Jere Kahanpää; Event: eventDate: 1953-01-01/05-01; Record Level: collectionID: http://id.luomus.fi/HR.110; institutionCode: MZH; collectionCode: Diptera Fennica; basisOfRecord: PreservedSpecimen

Occurrence: recordedBy: Ragnar Storå; individualCount: 1; sex: female; Taxon: scientificName: Hydrophoruscallosoma; order: Diptera; family: Dolichopodidae; scientificNameAuthorship: Frey, 1915; Location: country: Finland; stateProvince: KP; municipality: Pedersöre; decimalLatitude: 63.650; decimalLongitude: 22.810; geodeticDatum: WGS84; coordinatePrecision: 20000; Identification: identifiedBy: Jere Kahanpää; Event: eventDate: 1953-05-01; Record Level: collectionID: http://id.luomus.fi/HR.110; institutionCode: MZH; collectionCode: Diptera Fennica; basisOfRecord: PreservedSpecimen

Occurrence: recordedBy: Ragnar Storå; individualCount: 1; sex: female; Taxon: scientificName: Hydrophoruscallosoma; order: Diptera; family: Dolichopodidae; scientificNameAuthorship: Frey, 1915; Location: country: Finland; stateProvince: KP; municipality: Pedersöre; decimalLatitude: 63.650; decimalLongitude: 22.810; geodeticDatum: WGS84; coordinatePrecision: 20000; Identification: identifiedBy: Jere Kahanpää; Event: eventDate: 1953-08-14; Record Level: collectionID: http://id.luomus.fi/HR.110; institutionCode: MZH; collectionCode: Diptera Fennica; basisOfRecord: PreservedSpecimen

Occurrence: recordedBy: Ragnar Storå; individualCount: 1; sex: male; Taxon: scientificName: Hydrophoruscallosoma; order: Diptera; family: Dolichopodidae; scientificNameAuthorship: Frey, 1915; Location: country: Finland; stateProvince: KP; municipality: Pietarsaari; decimalLatitude: 63.690; decimalLongitude: 22.670; geodeticDatum: WGS84; coordinatePrecision: 1000; Identification: identifiedBy: Jere Kahanpää; Event: eventDate: 1953-08-15; Record Level: collectionID: http://id.luomus.fi/HR.110; institutionCode: MZH; collectionCode: Diptera Fennica; basisOfRecord: PreservedSpecimen

Occurrence: recordedBy: Ragnar Storå; individualCount: 2; sex: males; Taxon: scientificName: Hydrophoruscallosoma; order: Diptera; family: Dolichopodidae; scientificNameAuthorship: Frey, 1915; Location: country: Finland; stateProvince: KP; municipality: Pietarsaari; decimalLatitude: 63.690; decimalLongitude: 22.670; geodeticDatum: WGS84; coordinatePrecision: 1000; Identification: identifiedBy: Jere Kahanpää; Event: eventDate: 1953-08-16; Record Level: collectionID: http://id.luomus.fi/HR.110; institutionCode: MZH; collectionCode: Diptera Fennica; basisOfRecord: PreservedSpecimen

Occurrence: recordedBy: Ragnar Storå; individualCount: 9; sex: 2 males, 7 females; Taxon: scientificName: Hydrophoruscallosoma; order: Diptera; family: Dolichopodidae; scientificNameAuthorship: Frey, 1915; Location: country: Finland; stateProvince: KP; municipality: Pietarsaari; decimalLatitude: 63.690; decimalLongitude: 22.670; geodeticDatum: WGS84; coordinatePrecision: 1000; Identification: identifiedBy: Jere Kahanpää; Event: eventDate: 1953-08-19; Record Level: collectionID: http://id.luomus.fi/HR.110; institutionCode: MZH; collectionCode: Diptera Fennica; basisOfRecord: PreservedSpecimen

Occurrence: recordedBy: Ragnar Storå; individualCount: 7; sex: 3 males, 4 females; Taxon: scientificName: Hydrophoruscallosoma; order: Diptera; family: Dolichopodidae; scientificNameAuthorship: Frey, 1915; Location: country: Finland; stateProvince: KP; municipality: Pietarsaari; decimalLatitude: 63.690; decimalLongitude: 22.670; geodeticDatum: WGS84; coordinatePrecision: 1000; Identification: identifiedBy: Jere Kahanpää; Event: eventDate: 1953-08-20; Record Level: collectionID: http://id.luomus.fi/HR.110; institutionCode: MZH; collectionCode: Diptera Fennica; basisOfRecord: PreservedSpecimen

Occurrence: recordedBy: Ragnar Storå; individualCount: 1; sex: female; Taxon: scientificName: Hydrophoruscallosoma; order: Diptera; family: Dolichopodidae; scientificNameAuthorship: Frey, 1915; Location: country: Finland; stateProvince: KP; municipality: Pietarsaari; decimalLatitude: 63.690; decimalLongitude: 22.670; geodeticDatum: WGS84; coordinatePrecision: 1000; Identification: identifiedBy: Jere Kahanpää; Event: eventDate: 1953-08-22; Record Level: collectionID: http://id.luomus.fi/HR.110; institutionCode: MZH; collectionCode: Diptera Fennica; basisOfRecord: PreservedSpecimen

Occurrence: recordedBy: Ragnar Storå; individualCount: 2; sex: 1 male, 1 female; Taxon: scientificName: Hydrophoruscallosoma; order: Diptera; family: Dolichopodidae; scientificNameAuthorship: Frey, 1915; Location: country: Finland; stateProvince: KP; municipality: Pietarsaari; decimalLatitude: 63.690; decimalLongitude: 22.670; geodeticDatum: WGS84; coordinatePrecision: 1000; Identification: identifiedBy: Jere Kahanpää; Event: eventDate: 1953-08-29; Record Level: collectionID: http://id.luomus.fi/HR.110; institutionCode: MZH; collectionCode: Diptera Fennica; basisOfRecord: PreservedSpecimen

Occurrence: recordedBy: Ragnar Storå; individualCount: 4; sex: 2 males, 2 females; Taxon: scientificName: Hydrophoruscallosoma; order: Diptera; family: Dolichopodidae; scientificNameAuthorship: Frey, 1915; Location: country: Finland; stateProvince: KP; municipality: Pietarsaari; decimalLatitude: 63.690; decimalLongitude: 22.670; geodeticDatum: WGS84; coordinatePrecision: 1000; Identification: identifiedBy: Jere Kahanpää; Event: eventDate: 1953-09-05; Record Level: collectionID: http://id.luomus.fi/HR.110; institutionCode: MZH; collectionCode: Diptera Fennica; basisOfRecord: PreservedSpecimen

Occurrence: recordedBy: Ragnar Storå; individualCount: 1; sex: female; Taxon: scientificName: Hydrophoruscallosoma; order: Diptera; family: Dolichopodidae; scientificNameAuthorship: Frey, 1915; Location: country: Finland; stateProvince: KP; municipality: Pietarsaari; decimalLatitude: 63.690; decimalLongitude: 22.670; geodeticDatum: WGS84; coordinatePrecision: 1000; Identification: identifiedBy: Jere Kahanpää; Event: eventDate: 1953-09-20; Record Level: collectionID: http://id.luomus.fi/HR.110; institutionCode: MZH; collectionCode: Diptera Fennica; basisOfRecord: PreservedSpecimen

Occurrence: recordedBy: Jere Kahanpää; individualCount: 1; sex: male; otherCatalogNumbers: labelcode: jka-05-00377; Taxon: scientificName: Hydrophoruscallosoma; order: Diptera; family: Dolichopodidae; scientificNameAuthorship: Frey, 1915; Location: country: Finland; stateProvince: PPe; municipality: Hailuoto; locality: Santosenmatala ; verbatimCoordinates: 72135:34085; verbatimCoordinateSystem: ykj; decimalLatitude: 65.006; decimalLongitude: 25.057; geodeticDatum: WGS84; coordinatePrecision: 200; Identification: identifiedBy: Jere Kahanpää; Event: samplingProtocol: sweep netting; eventDate: 2005-06-04; Record Level: collectionCode: Priv. Coll. J. Kahanpää; basisOfRecord: PreservedSpecimen

Occurrence: recordedBy: Jere Kahanpää; individualCount: 17; sex: 8 males, 9 females; otherCatalogNumbers: labelcode: jka-05-04568, 04566, 04595, 04596, 04573, 04570, -04575, -04583, -04588, -04578, -04569, jka-05-04581, jka-05-04582, jka-05-04584, jka-05-04577, jka-05-04567, jka-05-04574; Taxon: scientificName: Hydrophoruscallosoma; order: Diptera; family: Dolichopodidae; scientificNameAuthorship: Frey, 1915; Location: country: Finland; stateProvince: PPe; municipality: Lumijoki; locality: Varjakka, Karinpaeae ; verbatimCoordinates: 72031:34090; verbatimCoordinateSystem: ykj; decimalLatitude: 64.913; decimalLongitude: 25.075; geodeticDatum: WGS84; coordinatePrecision: 200; Identification: identifiedBy: Jere Kahanpää; Event: samplingProtocol: sweep netting; eventDate: 2005-09-01; Record Level: collectionCode: Priv. Coll. J. Kahanpää; basisOfRecord: PreservedSpecimen

Occurrence: recordedBy: Jere Kahanpää; individualCount: 1; sex: male; otherCatalogNumbers: labelcode: jka06-02709; Taxon: scientificName: Hydrophoruscallosoma; order: Diptera; family: Dolichopodidae; scientificNameAuthorship: Frey, 1915; Location: country: Finland; stateProvince: PPe; municipality: Lumijoki; locality: Varjakka, Karinpaeae ; verbatimCoordinates: 72031:34090; verbatimCoordinateSystem: ykj; decimalLatitude: 64.913; decimalLongitude: 25.075; geodeticDatum: WGS84; coordinatePrecision: 200; Identification: identifiedBy: Jere Kahanpää; Event: samplingProtocol: sweep netting; eventDate: 2006-07-09; Record Level: collectionCode: Priv. Coll. J. Kahanpää; basisOfRecord: PreservedSpecimen

Occurrence: recordedBy: Jere Kahanpää; individualCount: 1; sex: male; Taxon: scientificName: Hydrophoruscallosoma; order: Diptera; family: Dolichopodidae; scientificNameAuthorship: Frey, 1915; Location: country: Finland; stateProvince: KP; municipality: Kalajoki; locality: Aeijaensaeikkae M2 ; verbatimCoordinates: 713499:334989; verbatimCoordinateSystem: ykj; decimalLatitude: 64.281; decimalLongitude: 23.897; geodeticDatum: WGS84; coordinatePrecision: 100; Identification: identifiedBy: Jere Kahanpää; Event: samplingProtocol: Malaise trap; eventDate: 2005-06-03/07-03; Record Level: collectionCode: Priv. Coll. J. Kahanpää; basisOfRecord: PreservedSpecimen

Occurrence: recordedBy: Jere Kahanpää; individualCount: 1; sex: male; otherCatalogNumbers: labelcode: jka-05-02637; Taxon: scientificName: Hydrophoruscallosoma; order: Diptera; family: Dolichopodidae; scientificNameAuthorship: Frey, 1915; Location: country: Finland; stateProvince: KP; municipality: Kalajoki; locality: Aeijaensaeikkae ; verbatimCoordinates: 71355:33499; verbatimCoordinateSystem: ykj; decimalLatitude: 64.286; decimalLongitude: 23.897; geodeticDatum: WGS84; coordinatePrecision: 200; Identification: identifiedBy: Jere Kahanpää; Event: samplingProtocol: sweep netting; eventDate: 2005-07-30; Record Level: collectionCode: Priv. Coll. J. Kahanpää; basisOfRecord: PreservedSpecimen

Occurrence: recordedBy: Jere Kahanpää; individualCount: 1; sex: female; otherCatalogNumbers: labelcode: jka-05-04561; Taxon: scientificName: Hydrophoruscallosoma; order: Diptera; family: Dolichopodidae; scientificNameAuthorship: Frey, 1915; Location: country: Finland; stateProvince: KP; municipality: Kalajoki; locality: Kalajokisuu ; verbatimCoordinates: 71350:33499; verbatimCoordinateSystem: ykj; decimalLatitude: 64.282; decimalLongitude: 23.898; geodeticDatum: WGS84; coordinatePrecision: 200; Identification: identifiedBy: Jere Kahanpää; Event: samplingProtocol: sweep netting; eventDate: 2005-09-01; Record Level: collectionCode: Priv. Coll. J. Kahanpää; basisOfRecord: PreservedSpecimen

Diagnosis

Hydrophorus callosoma is externally most like Hydrophorus altivagus Aldrich, 1911 (= Hydrophorus wahlgreni Frey, 1915). Both sexes can be identified by the armature on fore femora: there is only a single short row of 6-13 small ventral spines in the basal third of the fore femur. Anteroventral spines missing or at most 1-3 very short ones present (usually completely absent in females). Hydrophorus altivagus has a row of strong anteroventral spines reaching the apical third of the femur in addition to the ventral spines. Other differences between the two species are tabulated in Table 1.

Distribution

Sweden, Finland and North-Western Russia (Murmansk and Archangelsk Oblasts).

Discussion

Richard Frey described Hydrophorus callosoma as a variety of on the basis of two female specimens. He did, however, express doubt about it's true status. The name has later been synonymed with Hydrophorus wahlberg Frey, 1915 ( Negrobov 1977), which in turn was synonymised with Hydrophorus altivagus Aldrich, 1911 ( Hurley 1985).

The type material of Hydrophorus callosoma Frey consists of two females deposited in MZH. The lectotype (here designated), a female from Kantalaks (=Kandalaksha, Russia), is identical with Hydrophorus albosignatus Ringdahl, 1919 (Figs 1c, 2c, 3c). Frey's second type specimen from Kem belongs to Hydrophorus altivagus .

Frey's Hydrophorus callosoma type material was compared with a single female paralectotype of Hydrophorus albosignatus Ringdahl, 1919 (see Figs 1e, 2e, 3e). It does match the Kantalaks specimen and the description of the male provided by Ringdahl, plus all available figures of the two species, clearly indicate that Hydrophorus albosignatus Ringdahl is identical with Hydrophorus callosoma of Frey.

The Kantalaks specimen is here designated as the lectotype of Hydrophorus callosoma Frey, 1915. This choice is made because only this specimen does actually match Frey's original description "...near the previous species [= Hydrophorus wahlbergi ], from which is differs by its much more brilliant coloration and the pale hairs on the sides of the abdomen" ( Frey 1915). The Kem specimen-like all specimens of both species-have pale hairs on the ventral margin of the tergites only. Because of the distortion of the abdomen of this dry-pinned female, the ventral hairs are visible when viewed from above.

Hydrophorus callosoma Frey, 1915 is thus a senior synonym of Hydrophorus albosignatus Ringdahl, 1919 and becomes the valid name for this species (syn. nov.).