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FAMILY LAUXANIIDAE
Paul L.Th. Beuk Version date: 03-01-2023 18:31
Meiosimyza spec.
Diagnosis. Small to medium-sized (2.0-6.0 mm), often rather plump flies. Body coloration ranging from yellow, brown, grey, or greenish-black, or combinations of these, sometimes with distinct pattern. Body surface dull or (partly) shining. Head dichoptic in both sexes; 2 usually reclinate orbital bristles, vibrissae absent, postvertical setae convergent to cruciate. Wing with costal vein unbroken, membrane clear, yellowish tinged, partly clouded or with distinct pattern. Preapical dorsal seta on tibiae present.

Biology. Larvae as far as known saprophagous, some are facultative miners of decaying leaves, while others develop in decaying material in birds-nests. Larvae apparently consume micro-organisms or fungi associated with decay. Adults of most species can be found in the undergrowth of shady places, like damp woods, banks of streams, marshes etc. Adults of Homoneura are a dapted to drier circumstances.

General references. Papp (1984a [catalogue]), Papp & Shatalkin (1998 [general, key to genera]), Schacht et al. (2004 [keys to genera and species]), Shatalkin (2000 [general, keys to genera and species, catalogue]), Shewell (1987a [general, key to genera, Nearctic])

References to the local fauna. Beuk et al. (1993), Beuk & Belgers (2017), H. de Jong (2000b), H. de Jong & Beuk (2000b), Martinek & Van Zuijlen (1996), De Meijere (1907)

How to quote this page: Beuk, P.L.Th., 2023. Family Lauxaniidae. In: Beuk, P.L.Th. (Ed.): Checklist of the Diptera of the Netherlands, https://diptera-info.nl/news.php?fam=Lauxaniidae (date accessed: 19/04/2024).

NL: 53, 2? B: 47 D: 46, 3? UK: 56 World: 1500
 
LAUXANIIDAE
 
HOMONEURINAE
                 
  Homoneura Van der Wulp, 1891
  biumbrata (Loew, 1847) N; first recorded in original checklist (H. de Jong & Beuk, 2002b)  Note 1
  consobrina (Zetterstedt, 1847) N; added by Beuk & Belgers (2017: 104) 
  interstincta (Fallén, 1820) N; confirmed by Beuk & Belgers (2017: 104)  Note 2
  mediospinosa Merz, 2003 N; misidentification pointed out by Merz (2003: 352) 
  = interstincta (Fallén, 1820): misident. sensu auct.
  notata (Fallén, 1820) N; confirmed as subnotata by Martinek & Van Zuijlen (1996: 57  Note 3
  = subnotata Papp, 1978
  patelliformis (Becker, 1895) N; first recorded in original checklist (H. de Jong & Beuk, 2002b)  Note 4
  thalhammeri Papp, 1978 N; added by Beuk & Belgers (2017: 105) 
 
LAUXANIINAE
                 
  Aulogastromyia Hendel, 1925
  anisodactyla (Loew, 1845) N 
                 
  Calliopum Strand, 1928
  aeneum (Fallén, 1820) N 
  elisae (Meigen, 1826) N; first recorded in original checklist (H. de Jong & Beuk, 2002b)  Note 5
  = nitens (Loew, 1858): misident., pro parte
  geniculatum (Fabricius, 1805) N; first recorded in original checklist (H. de Jong & Beuk, 2002b)  Note 6
  = nitens (Loew, 1858): misident., pro parte
  simillimum (Collin, 1933) N; added by Martinek & Van Zuijlen (1996: 57) 
  = aeneiventris (Fallén, 1820): misident.
  tuberculosum (Becker, 1895) N; first recorded as sordidum in original checklist (H. de Jong & Beuk, 2002b)  Note 7
  = sordidum (Haliday, 1833): preocc.
  = halidayi (Shatalkin, 2000) N 
                 
  Lauxania Latreille, 1804
  cylindricornis (Fabricius, 1794) N 
                 
  Meiosimyza Hendel, 1925
  = Lyciella Collin, 1948
  affinis (Zetterstedt, 1847) N 
  decempunctata (Fallén, 1820) N 
  decipiens (Loew, 1847) N 
  illota (Loew, 1847) N 
  platycephala (Loew, 1847) N 
  rorida (Fallén, 1820) N 
  subfasciata (Zetterstedt, 1838) N 
                 
  Minettia Robineau-Desvoidy, 1830
  subg. Frendelia Collin, 1948
  longipennis (Fabricius, 1794) N 
  subg. Minettia Robineau-Desvoidy, 1830
  desmometopa (De Meijere, 1907) T 
  fasciata (Fallén, 1826) N; added as rivosa by Beuk et al. (1993: xxii)  Note 8
  = rivosa Meigen, 1826
  inusta (Meigen, 1826) N 
  longiseta (Loew, 1847) N 
  lupulina (Fabricius, 1787) N 
  plumicornis (Fallén, 1820) N 
  tabidiventris (Rondani, 1877) N; confirmed by Beuk (2019b: 369)  Note 8
  = fasciata (Fallén, 1826): misident. sensu auct.
  tubifer (Meigen, 1826) N  Note 9
  = uncinata (De Meijere, 1907) T 
                 
  Nannomyza Frey, 1941 Note 10
  basalis (Zetterstedt, 1847) N; first recorded in original checklist (H. de Jong & Beuk, 2002b)  Note 11
                 
  Pachycerina Macquart, 1835
  pulchra Loew, 1850 N; added by Beuk & Belgers (2017: 106) 
                 
  Peplomyza Haliday, 1837
  litura (Meigen, 1826) N 
                 
  Poecilolycia Shewell, 1986
  vittata (Walker, 1849) N; first recorded in original checklist (H. de Jong & Beuk, 2002b)  Note 12
                 
  Pseudolyciella Shatalkin, 1999
  pallidiventris (Fallén, 1820) N 
  stylata Papp, 1978 N; first recorded in original checklist (H. de Jong & Beuk, 2002b)  Note 13
  subpallidiventris Papp, 1978 N; first record  Note 13
                 
  Sapromyza Fallén, 1810 Note 10
  albiceps Fallén, 1820 N 
  apicalis Loew, 1847 N  Note 14
  intonsa Loew, 1847 N; added by Beuk (2019b: 370) 
  obscuripennis Loew, 1847 N; first recorded in original checklist (H. de Jong & Beuk, 2002b)  Note 15
  obsoleta Fallén, 1820 N  Note 16
  = obtusa Collin, 1948: misident. sensu H. de Jong & Beuk, 2002b
  setiventris Zetterstedt, 1847 added by Dek (2022: 78) 
  sexpunctata Meigen, 1826 N 
  simplicior Hendel, 1908 N 
  = simplex Loew, 1847: preocc.
  = setiventris Zetterstedt, 1847: misident. sensu De Meijere, 1907
  viciespunctata Czerny, 1932 N; added by Beuk & Belgers (2017: 107) 
  zetterstedti Hendel, 1908 N; first recorded in original checklist (H. de Jong & Beuk, 2002b)  Note 17
                 
  Sapromyzosoma Lioy, 1864 Note 10
  laevatrispina (Carlés-Tolra, 1992) N; added by Beuk (2019b: 371) 
  quadricincta (Becker, 1895) N 
  = bipunctata (Meigen, 1830)
  quadripunctata (Linnaeus, 1767) N 
                 
  Schumannimyia Papp, 1978 Note 10
  hyalinata (Meigen, 1826) N 
  = atripes (Meigen, 1838): misident.
  = frontalis (Loew, 1858)
                 
  Tricholauxania Hendel, 1925
  praeusta (Fallén, 1820) N 
                 
  Trigonometopus Macquart, 1835
  frontalis (Meigen, 1830) N 
 
Doubtful species
 
  Homoneura Van der Wulp, 1891    
  dilecta (Rondani, 1868)   Note 3
  = notata (Fallén, 1820): misident. sensu auct. 
  vicina (De Meijere, 1907) T  Note 18
 
Deleted species
 
  Meiosimyza Hendel, 1925  
  mihalyii Papp, 1978   Note 19
 
Notes
Note 1 Material examined: GELDERLAND: Rijswijk (1 [m], 1 [f]: 19.vi.1993, leg. P.L.Th. Beuk [BEUK]), det. P.L.Th. Beuk.
Note 2 Previously recorded material under the name interstincta was presumed to belong to mediospinosa (= interstincta sensu auct.) (see Merz, 2003). Most of the checked material under interstincta indeed belonged to the new species or was refered to other species, but did not belong to the true interstincta. However, Beuk & Belgers (2017) examined recently collected material belonging to H. interstincta, so the species is maintained on the list.
Note 3 The misinterpretation of H. notata by Papp (1978a) was pointed out by Merz (2003: 355). So far, recently confirmed material all belonged to ’H. subnotata’ which was shown to be a junior synonym of H. notata. Older material still needs to be checked to see whether H. dilecta (= H. notata sensu Papp, 1978) is indigenous or not.
Note 4 Material examined: GELDERLAND: Kotten (1 [f]: 8-11.vi.1993, leg. C.J. Zwakhals MT [BEUK]); LIMBURG: Sint Pietersberg (1 [m]: 6.viii.1991, leg. B. van Aartsen MT [BEUK]; 1 [m]: 8.vii.1994, leg. B. van Aartsen [BEUK]), det. P.L.Th. Beuk.
Note 5 aterial examined: NOORD-HOLLAND: Weesp (4 [m][m], 1 [f]: vi.1894, leg. J.C.H. de Meijere, det. A.I. Shatalkin [ZMAN]); OVERIJSSEL: Staphorst (1 [f]: 28.vii.1989, leg. H.J. Prijs [BEUK]); ZUID-HOLLAND: Heenvliet (1 [f]: 28.viii.1993, leg. P.L.Th. Beuk [BEUK]), det. P.L.Th. Beuk.
Note 6 Material examined: GELDERLAND Wageningen (1 [m]: 5.vii.1951, leg. J. de Goede [LUW]); NOORD-HOLLAND: Hilversum (1 [f]: 28.vi.1909, leg. J.C.H. de Meijere [LUW]; 1 [f]: 30.v.1912, leg. J.C.H. de Meijere [LUW]), det. P.L.Th. Beuk.
Note 7 Synonymy established and transferred from Sapromyza to Calliopum by Ebejer (2019: 42).
Note 8 Merz (2004) revised the Minettia fasciata group and found that the true M. fasciata is actually the senior synonym of M. rivosa. Minettia fasciata sensu auct. should be named M. tabidiventris (Rondani, 1877). It appears this confusion arose with Collin’s publication on the British Lauxaniidae. Consequently, it seems probable that Dutch records before Collin’s publication may indeed belong to the true M. fasciata. The occurrence of Minettia tabidiventris has now been confirmed.
Note 9 M. uncinata is apparently closely related to M. tubifer and preliminary research indicates that it may well be identical. Pending a future publication about the matter, M. uncinata is here provisionally placed as synonym of M. tubifer.
Note 10 Papp & Shatalkin (1998) elevated the previous subgenera of Sapromyza to generic status on account of the genus being paraphyletic. However, their claim was not substantiated in that publication but many recent catalogues have followed this classification.
Note 11 Material examined: GELDERLAND: Elburg (1 [m]: 30.vi.1992, leg. B. van Aartsen MT [AARTSEN]; 1 [m], 2 [f][f]: 30.vi.1992, leg. B. van Aartsen MT [BEUK]; 1 [m], 1 [f]: 30.vi.1992, leg. B. van Aartsen MT [BEUK]; 1 [m], 1 [f]: 30.vi.1992, leg. B. van Aartsen MT [LUW]; 1 [m], 1 [f]: 30.vi.1992, leg. B. van Aartsen MT [RMNH]; 1 [m], 1 [f]: 30.vi.1992, leg. B. van Aartsen MT [BEUK]; 1 [m]: 30.vi.1992, leg. B. van Aartsen MT [ZUIJLEN]; 1 [m]: 15.vii.1992, leg. B. van Aartsen [BEUK]), Heerde (1 [m]: 15.vii.1992, leg. B. van Aartsen [BEUK]), Tongeren (1 [m]: 30.vi.1992, leg. B. van Aartsen [AARTS]; 1 [m]: 30.vi.1992, leg. B. van Aartsen [ZUIJLEN]), det. P.L.Th. Beuk. Papp & Shatalkin (1998) elevated the previous subgenera of Sapromyza to generic level on account of the genus being paraphyletic. However, their claim was not substantiated in that publication but many recent catalogues have follwed this classification.
Note 12 Material examined: NOORD-BRABANT: Best (Achterste Broek, 1 [m]: 4.vi.1994, leg. P.L.Th. Beuk [BEUK]).
Note 13 Separation of these two species is sometimes difficult because there appear to be intermediates in mixed populations. Both 'typical' forms were observed. Material examined: DRENTHE: Boswachterij Norg (1 [m]: 30.v.1992, leg. P.L.Th. Beuk [BEUK]); FRIESLAND: Rijs (1 [f]: 28.v.1981, leg. H.J. Prijs [BEUK]); GELDERLAND: Epe (1 [m]: 2.vi.1994, leg. B. van Aartsen MT [RMNH]), Rijswijk (1 [m]: 19.vi.1993, leg. P.L.Th. Beuk [BEUK]); LIMBURG: Thorn (1 [m]: 11.x.1993, leg. T. Peeters [RMNH]); NOORD-BRABANT (1 [m]: 5.vi.1994, leg. P.L.Th. Beuk [RMNH]); NOORD-HOLLAND: Haarlem (Engelandlaan, 11 [m]: 25.viii.1997, leg. P.L.Th. Beuk [BEUK]).
Note 14 Chandler (1998a: 129) notes this is a homonym or synonym of Sylvia apicalis Robineau-Desvoidy, 1830 with Sylvia being preoccupied and without valid type-species designation.
Note 15 Material examined: GELDERLAND: Kotten (1 [f]: 8-11.vi.1993, leg. C.J. Zwakhals MT [BEUK]), det. P.L.Th. Beuk.
Note 16 To confirm the conspecificy of Meiosimyza obtusa with M. mihalyii Papp, 1978, the specimen recorded by H. de Jong & Beuk (2002b: ZUID-HOLLAND: Noordwijk (1 [m]: 14-30.v.1993, leg. E.J. van Nieukerken [BEUK]), det. P.L.Th. Beuk) was checked. It turned out this specimen actually belonged to S. obsoleta, a species of Sapromyza with a smaller presutural dorsocentral setae. A pair of presutural dorsocentral setae is normally indicative of Meiosimyza and similar genera and is usually absent in Sapromyza.
Note 17 Material examined: GELDERLAND: 't Harde (1 [m]: 14.vi.1989, leg. B. van Aartsen [BEUK]), det. P.L.Th. Beuk.
Note 18 This species represents a species of Homoneura but it's identity has not yet been established.
Note 19 Erroneously recorded as obtusa by H. de Jong & Beuk (2002b) but identification corrected by Beuk & Belgers (2017).
 
The latest revisions at different levels
The family introduction was last edited on 14-07-2017 14:10
Nannomyza was the last (sub)genus to be edited on 14-07-2017 11:03
Sapromyza setiventris was the last (sub)species to be edited on 03-01-2023 18:31















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