Ancylorhynchus sokokensis Londt 2011, sp. n.
Creators: name: Londt, Jason G. H.
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Asilidae
Ancylorhynchus
Ancylorhynchus sokokensis

description: Ancylorhynchus sokokensis sp. n.   Figs 24, 54, 126–128  
Etymology: Named after the type locality, Kenya’s Sokoke Forest.  
Description:  
 Male (based on holotype. Condition: Excellent (appears mounted from alcohol).).   
 Head: Dark red-brown to black, fine gold pruinose, pale yellow, orange and black setose. Antenna (Fig. 24, paratype): orange-brown, scape and pedicel orange setose (1 dark red-brown setae), postpedicel tipped with obliquely situated pit-enclosed spine-like sensory element (terminal stylus ‘segment’ absent). Segmental ratios: 1:0.3:5.6. Face black, fine gold pruinose (weakly on lateral parts of epistomal margin), mystax shiny orange occupying ventral ½ of face. Frons and vertex black, fine gold pruinose, pale yellow setose; ocellar tubercle fine pale yellow setose (no macrosetae). Occiput black, uniformly fine gold pruinose, dorsal setae orange ventral setae black. Palpus dark red-brown, black setose, terminal palpomere swollen, apex with terminal sensory pit. Proboscis dark red-brown, black setose.   
 Thorax: Black with orange areas dorsally, fine silver-grey pruinose, white, pale yellow and orange setose. Prothorax black except for orange antepronotum, fine silver-grey pruinose, pale yellow setose dorsally, black laterally. Mesonotum orange with black pattern (median band stretching from anterior to posterior margins, widening at level of transverse suture), fine silver-grey pruinose, fine moderately long white and pale yellow setose. Mesonotal macrosetae (usually orange when present): dc weak, confined to region posterior to transverse suture, 3–4 npl, 1 spal, 3 pal. Scutellum orange with narrow black anterior margin, fine silver pruinose, disc sparsely pale yellow setose, hind margin with c. 10 pale yellow, longish weakly developed macrosetae accompanied by minor setae. Pleura entirely black, entirely silver-grey pruinose, setae white and black confined mainly to anepst, kepst and ktg (setae white). Anatg and mes pnot dark red-brown to black, contrasting with mainly orange scutellum. Legs: cx black, silver pruinose, white setose; tro orange (tro 2 with few short black setae ventrally); fem, tib and tar orange, tar 5 a little darker, white to pale yellow setose (some black setae on tar), claws dark red-brown with orange proximal parts. Wings (Fig. 54): 7.4× 3.1 mm. Veins mostly dark red-brown. Membrane extensively microtrichose (some proximal cells partly bare), pale yellow-brown stained (tip somewhat darker commencing at level of r–m), cells cup and a1+2 transparent. Haltere yellow with orange base.   
 Abdomen: Predominantly dark red-brown to blackish with orange patches laterally, fine silver-grey pruinose, white and black setose. T1 dark red-brown to black, silver pruinose; T2 dark red-brown to blackish with large orange areas posterolaterally. Strongly silver pruinescence corresponds with orange areas; T3–4 dark red-brown to black with narrow posterolateral margins, silver pruinose (especially in regions with orange colour; T5–terminalia dissected and clear for drawing. Sternites similar to tergites but lacking orange areas.   
 Genitalia (Figs 126–128): Epand bifid, forming pair of parallel, fairly stout lobes that jut out beyond all other genital structures. Lobes closely abut proximally, each being relatively straight with inwardly curved distal ends. Proct simple, dorsally situated cerc closely associated proximally. Goncx well developed, outer lobe tapering posteriorly to narrowly-rounded tip; dorsal finger-like process absent; inner lobe well developed, distal end pointed, well sclerotised and medially directed. Gonst compressed, dorsally directed, tip curved anteriorly. Hypd moderately developed, twice as broad as long, tapering fairly rapidly to pair of fairly widely separated, flattened distal processes. Aed fairly stout with tiny bifid distal tip.   
 Female. Similar to male but head and prothorax more extensively orange setose. Thorax more extensively orange including parts of pleura (dorsal part of ktps, posterior half of ktg anatergite). Tip of wing more obviously dark stained. Abdomen far more extensively yellow to orange and fine gold pruinose.   
Holotype: ♂ KENYA: ‘ Sokoke For [Forest, 03°29'S: 39°50'E] K [Kenya]/ 8 May 76 IB [?]’ (BMNH).  
Paratype: 1♀ labels as for holotype (BMNH).  
Distribution, phenology and biology: Known only from East Africa (Kenya) (Table 1). The types were collected in May (Table 2). The biology is unknown. Although the type locality is a forest the specimens may have been collected in vegetation adjacent to the forest.  
 Similar species:A member of the nomadus species-group with close similarities to cruciger and hylaeiformis.
description: Published as part of Londt, Jason G. H., 2011, A review of Afrotropical Ancylorhynchus Berthold, 1827 (Diptera: Asilidae: Stenopogoninae), pp. 471 in African Invertebrates 52 (2) on pages 522-524, DOI: 10.5733/afin.052.0214, http://zenodo.org/record/7917250