Ancylorhynchus similis, Londt, 2011

Londt, Jason G. H., 2011, A review of Afrotropical Ancylorhynchus Berthold, 1827 (Diptera: Asilidae: Stenopogoninae), African Invertebrates 52 (2), pp. 471-471 : 518-520

publication ID

https://doi.org/ 10.5733/afin.052.0214

DOI

https://doi.org/10.5281/zenodo.7921038

persistent identifier

https://treatment.plazi.org/id/03B75F77-C610-FF8C-FE72-DE4EFEBCFEAE

treatment provided by

Felipe (2023-05-08 21:04:57, last updated by Plazi 2023-11-09 03:28:19)

scientific name

Ancylorhynchus similis
status

sp. nov.

Ancylorhynchus similis sp. n.

Figs 21 View Figs 3–30 , 51 View Figs 51–60 , 117–119 View Figs 111–128

Etymology: From Latin similis (similar); referring to the fact that this species resembles nomadus .

Description:

Male (based on holotype. Condition: Poor; both antennae broken off beyond pedicel; right pro- and mesothoracic legs missing, metathoracic leg broken off beyond tibia; left metathoracic leg broken off at midlength of femur; left wing missing; generally dirty.).

Head: Dark red-brown, silver pruinose, pale yellow to white (= whitish) and dark red-brown setose. Antenna ( Fig. 21 View Figs 3–30 , paratype): Scape and pedicel dark red-brown, pale whitish setose, postpedicels missing (proportions of scape and pedicel suggest a long strap-like postpedicel lacking stylus ‘segment’). Segmental ratios: 1:0.4:?. Face dark red-brown, silver pruinose except for lateral parts of epistomal margin, mystax whitish occupying ventral ⅓ of face. Frons and vertex dark red-brown, fine silver-grey pruinose, whitish setose; ocellar tubercle fine whitish setose (no macrosetae). Occiput dark red-brown to black, uniformly silver pruinose, whitish setose. Palpus dark red-brown, dark red-brown setose, terminal palpomere slightly swollen, apex with terminal sensory pit. Proboscis dark red-brown, whitish setose.

Thorax: Uniformly dark red-brown to black, silver-grey pruinose, mainly whitish setose. Prothorax entirely dark red-brown to black, fine silver-grey pruinose, whitish setose. Mesonotum uniformly dark red-brown to black, fine silver-grey pruinose, fine moderately long whitish setose. Mesonotal macrosetae (whitish except for npl): dc confined to region posterior to transverse suture, 3 dark red-brown npl, 1 spal, 3–4 pal. Scutellum entirely dark red-brown, fine silver pruinose, disc sparsely whitish setose, hind margin with c. 6 whitish weakly developed macrosetae accompanied by minor setae. Pleura entirely dark red-brown to black, entirely silver-grey pruinose, setae whitish confined to anepst, kepst and ktg. Anatg and mes pnot dark red-brown to black. Legs: cx dark red-brown to black, silver pruinose, whitish setose; tro dark red-brown; fem, tib and tar uniformly dark red-brown, entirely whitish setose, claws dark red-brown with red-brown proximal parts. Wings ( Fig. 51 View Figs 51–60 , paratype): 6.5× 2.6 mm. Veins dark red-brown. Membrane extensively microtrichose (some proximal cells partly bare), extensively brown stained (basal parts transparent). Haltere orange with brown proximal half.

Abdomen: Predominantly orange (anterior segments dark red-brown), fine silver pruinose, whitish setose. T1 entirely dark red-brown to black, T2 orange with dark red-brown anterior ⅓; T3–4 entirely orange; T5–terminalia dissected and macerated. Sternites similar to tergites but S2 entirely dark red-brown.

Genitalia ( Figs 117–119 View Figs 111–128 ): Epand bifid, forming pair of parallel, moderately slender lobes that jut out beyond all other genital structures. Lobes closely abut proximally, each being relatively straight (slightly sinuous in dorsal view) with slightly inwardly curved distal tips. Proct simple, dorsally situated cerc appearing fused proximally. Goncx well developed, outer lobe projecting posteriorly to fairly narrowly-rounded tip; dorsal finger-like process well-developed; inner lobe well developed, distal end as sclerotised, medially directed pointed structure. Gonst compressed, dorsally directed, tip curved anteriorly. Hypd moderately developed, twice as broad as long in ventral view with smoothly curved posterior margin. Aed sub-triangular with tiny bifid distal tip.

Female. Similar to ♂ except for following differences: Head more extensively blackish (including entire antenna); palpal setae white; all mesonotal macrosetae white; wing length 8.5 and 8.9 mm (slightly larger than ♂); T2 with strongly silver pruinose areas situated anterolaterally (posteromedial area blackish); T4–5 bright orange, posterior margins strongly silver pruinose.

Holotype: ♂ GHANA: ‘ Gold Coast / Accra. [05°33'N: 00°13'W] / 22.vi.1941. / K.M. Guichard / B.M. 1945–39’ ( BMNH). GoogleMaps

Paratypes: 2♀ CÔTE D’IVOIRE : 2♀ ‘ Côte d’Ivoire: Comoé / Nat. Park. Kakpin / Camp 16–18.iv.1989 / 08°40’N 03°12’W / JGH Londt. Malaise / and savanna woodland’ ( NMSA) GoogleMaps .

Distribution, phenology and biology: Known only from West Africa ( Côte d’Ivoire, Ghana) ( Table 1). The species has been collected in April and June (Table 2). The biology is largely unknown, but I collected two females in ‘savanna woodland’.

Similar species: A member of the nomadus species-group, with close similarities to nyukinus .

Gallery Image

Figs 3–30. Antennae of Ancylorhynchus species: (3) A. cruciger (Loew, 1858), holotype, left side outer view; (4) A. dilobion sp. n., holotype, left side outer view; (5) A. doryphorus sp. n., holotype, right side inner view; (6) A. feijeni sp. n., holotype, left side outer view; (7) A. fulvicollis (Bigot, 1879), ♂ Pietermaritzburg, left side outer view; (8) A. funebris Bromley, 1936, ♂ Masiene, left side outer view; (9) A. gessi sp. n., holotype, left side outer view; (10) A. greatheadi sp. n., holotype, left side outer view; (11) A. hylaeiformis Speiser, 1910, holotype, left side outer view; (12) A. insignis Bromley, 1936, holotype, left side outer view; (13) A. magnificus Bromley, 1936, holotype, left side outer view; (14) A. nomadus (Wiedemann, 1828), ♂ Zungeru, right side outer view (reversed); (15) A. nyukinus Speiser, 1910, holotype, right side outer view (reversed); (16) A. oldroydi Lindner, 1961, holotype,right side outer view (reversed); (17) A. phelpsi sp. n., holotype, left side outer view; (18) A. pretoriensis Bromley, 1936, holotype, left side outer view; (19) A. prunus Oldroyd 1974, holotype, left side outer view; (20) A. reynaudii (Macquart, 1838), ♀ Kommetjie, left side outer view; (21) A. similis sp. n., paratype, left side outer view; (22) A. simpsoni sp. n., holotype, left side outer view (postpedicel missing); (23) A. snowi sp. n., holotype, left side outer view (postpedicel missing); (24) A. sokokensis sp. n., paratype, left side outer view; (25) A. susurrus (Karsch, 1879), holotype, left side outer view; (26) A. tricolor (Loew, 1863), holotype braunsi, right side outer view (reversed); (27) A. unifasciatus (Loew, 1858), ♂ Cumberland, left side outer view; (28) A. variabilis nom. n., ♂ Hotazel, left side outer view; (29) A. whiteheadi sp. n., paratype, left side outer view; (30) A. zophos sp. n., holotype, right side inner view. Scale lines = 1 mm.

Gallery Image

Figs 51–60. Wings of Ancylorhynchus species: (51) A. similis sp. n., paratype; (52) A. simpsoni sp. n., holotype;(53) A. snowi sp. n., holotype;(54) A.sokokensis sp.n., holotype; (55)A. susurrus (Karsch, 1879), holotype; (56) A. tricolor (Loew, 1863), ♀ Teyateyaneng; (57) A. unifasciatus (Loew, 1858), ♂ Cumberland; (58) A. variabilis nom. n., ♂ Hotazel; (59) A. whiteheadi sp. n., holotype; (60) A. zophos sp. n., holotype. Not to scale, see text for measurements.

Gallery Image

Figs 111–128. Male terminalia of Ancylorhynchus species in lateral, dorsal and ventral views: (111–113) A. prunus Oldroyd 1974, holotype; (114–116) A. reynaudii (Macquart, 1838), holotype quadrimaculatus; (117–119) A. similis sp. n., holotype; (120–122) A. simpsoni sp. n., holotype; (123–125) A. snowi sp. n., holotype; (126–128) A. sokokensis sp. n., holotype. Scale lines = 1 mm.

NMSA

KwaZulu-Natal Museum

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Asilidae

Genus

Ancylorhynchus