Pachycerina nigrivittata Davies & Miller 2009, sp. n.
Creators: name: Davies, Gregory B. P.
name: Miller, Raymond M.
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Lauxaniidae
Pachycerina
Pachycerina nigrivittata

description: Pachycerina nigrivittata sp. n.   Figs 1, 22, 34, 40  
 Etymology: From Latin niger (black) and vitta (stripe), in reference to the black longitudinal stripes along ventral edges of abdominal tergites.   
 Diagnosis: P. nigrivittata is sympatric with P. vaga in KwaZulu-Natal, South Africa. They are very similar in coloration and chaetation, but P. nigrivittata (of both sexes) may be distinguished easily from P. vaga by having black vittae along the ventral margins of the abdominal tergites (these areas are uniformally yellow-orange in P. vaga). A further clear difference is in the shape of the male S5. P. nigrivittata has straight posterior processes with a tiny medial spur (Fig. 40), whereas P. vaga has incurved posterior processes with a more prominent medial spur (Fig. 39).   
Description:  
 Head: Ocellar spot large, black. Fronto-orbital plates not infuscated. Prefrontal spots large and black, touching edge of prefrons laterally. Scape and pedicel weakly infuscated orange-brown, postpedicel yellow.   
 Thorax: Scutal striping not distinct, but acrostichal, dorsocentral and presutural orange-brown vittae present. Scutellum yellow to orange. Postnotum orange-yellow. Upper lateral thoracic vitta present, but indistinct posterad of mesopleuron. Lower lateral thoracic vitta more pronounced in intensity. Meropleuron all yellow. Procoxa to profemur yellow, protibia to protarsus dark brown. Other legs yellow-orange. Wing anteriorly strongly fumose (costal cell, stigma, marginal cell and anterior part of submarginal cell infuscated). Haltere yellow, knob orange-brown.   
 Abdomen: Yellow, longitudinal black or dark brown vitta along ventral margin of syntergite 1+2 through T6.   
Male terminalia (Figs 22, 34, 40): S5 with straight posterior processes and small medial spur. Surstyli slightly longer than epandrium. Paired black spots on T6. Gonopods asymmetric, about equal in length and with distinct lateral spinules.Aedeagal apodeme long, thin and tapering anteriorly.  
 Measurements: ơ (n=3), ^(n=2): head length – ơ 0.8, ^0.8; thorax length (incl. scutellum) – ơ 2.2, ^2.0; abdomen length – ơ 1.6, ^1.6; wing length – ơ 4.4, ^4.2.   
 Holotype:1ơ SOUTH AFRICA: KwaZulu-Natal: Pietermaritzburg, Town Bush [29°34'S: 30°21'E], vii.1976, Malaise trap, R.M. Miller (NMSA).   
 Other material examined: CAMEROON: 1^Mt Cameroon [04°13'S: 09°10'E], Musake, 13.i.1932, M. Steele (BMNH). KENYA: 2^Kakamega Forest [0°15'N: 34°52'E], 18.xii.1970, A.E. Stubbs (BMNH); 1^Maguga [01°11'S: 36°39'E], viii.1969, C.F. Dewhurst, at light (BMNH); 2^same locality, x.1969, C.F. Dewhurst (BMNH). SOUTH AFRICA: KwaZulu-Natal: 1ơ Cathedral Peak [28°57'S: 29°19'E], 14– 16.i.1985, Malaise trap, R.M. Miller (NMSA); 1^same locality, 14–16.xii.1984, R.M. Miller (NMSA); 1ơ same locality, 1.i.1954, B.R. Stuckenberg (NMSA); 2^Cathedral Peak, Indumeni Forest, 5.xi.1965, B.R. Stuckenberg (NMSA); 1ơ Royal Natal Nat. Park [28°40'S: 28°50'E], 11.ix.1963, montane forest, B.R. & P. Stuckenberg (NMSA); 1ơ Pietermaritzburg, University of KwaZulu-Natal golf course [29°38'S: 30°24'E], 15.viii.1991, R.M. Miller (NMSA); 1^Pietermaritzburg, Ashburton [29°40'S: 30°27'E], ix.2004, Malaise trap, R.M.Miller (NMSA); 3^Pietermaritzburg, Town Bush [29°34'S: 30°21'E], ix.1976, Malaise trap, R.M. Miller (NMSA); 1ơ same locality, x.1976, Malaise trap, R.M. Miller (NMSA); 3^same locality, xi.1976, Malaise trap, R.M. Miller (NMSA); 2^same locality, xii.1976, Malaise trap, R.M. Miller (NMSA); 1ơ Albert Falls Dam, nr Crammond [30°24'S: 30°25'E], 17.vii.2001, R.M. Miller (NMSA); 1^ Howick [29°28'S: 30°13'E], 23.xii.1990, A.E. Whittington [NMSA]; 1^Rietvlei [29°09'S: 30°16'E], Karkloof forest, 31.v.1977, Malaise trap, I. Bampton (NMSA); 1^Karkloof Mts, nr Mt Alida [29°12'S: 30°20'E], 24.xii.1961, B. & P. Stuckenberg (NMSA); 1ơ Lion’s Bush [29°24'S: 29°55'E], Nottingham [Road], 9.viii.1954, B. Stuckenberg (NMSA); 1ơ Richmond [29°52'S: 30°17'E], 19.vii.2001, citrus orchard, R.M. Miller (NMSA); 3^Richmond, Enon Farm [29°49'S: 30°13'E], i.1964, B. & P. Stuckenberg (NMSA); 1ơ Deepdale [30°33'S: 29°54'E], Umkomaas River Valley, v.1959, B.R. Stuckenberg (NMSA); 1^ Umtentweni [30°43'S: 30°28'E], vii.1951, A.L. Capener (NMSA).
description: Published as part of Davies, Gregory B. P. & Miller, Raymond M., 2009, Revision of Afrotropical Pachycerina Macquart (Diptera: Lauxaniidae), pp. 295 in African Invertebrates 50 (2) on pages 312-313, DOI: 10.5733/afin.050.0207, http://zenodo.org/record/7910522