Description of five new species in the genus Phlyctinus Schoenherr (Coleoptera, Curculionidae): a first step in deciphering the P. callosus complex
Haran, Julien M.
Hansen, Steffan
Benoit, Laure
Addison, Pia
European Journal of Taxonomy
2020
2020-06-18
669
669
1
29
8KBN5
Haran
Haran & Hansen & Benoit & Cbgp
2020
[566,924,1366,1393]
Insecta
Curculionidae
Phlyctinus
Animalia
Coleoptera
15
16
Arthropoda
species
planithorax
sp. nov.
urn:lsid:zoobank.org:act: 6D17741D-DBF6-4AF3-BD2B-DBBF5F0ADD8A Figs 1D, 2D, 3D, 4E
Etymology The species name refers to the absence of a median carina on the prothorax of this species.
Material examined Holotype REPUBLIC OF SOUTH AFRICA• ♂; Western Cape province, Gordons Bay; 34º10.823ʹ S, 18º49.843ʹ E; 14 Apr. 2019; at base of Hymenolepiscrithmifolia(L.) Greuter( Asteraceae); CBGPcode JHAR02264; SAMC. Paratypes REPUBLIC OF SOUTH AFRICA– Western Cape province• 2 ♂♂, 2 ♀♀; same collection data as for holotype; CBGP• 1 ♂, 1 ♀; same collection data as for holotype; SAMC• 1 ♂, 6 ♀♀; Gordons Bay; 34º10.093ʹ S, 18º51.047ʹ E; 8 Nov. 2019; at base of Hymenolepis crithmifolia; CBGPcode JHAR03026; CBGP(ethanol coll.)• 7 ♂♂, 12 ♀♀; Gordons Bay, Sunbird; 34º11.209ʹ S, 18º49.154ʹ E; 8 Nov. 2019; at base of Carpobrotus edulis(L.) N.E.Br ( Aizoaceae); CBGPcode JHAR03027; CBGP(ethanol coll.).
Description BODY LENGTH. 6.0– 6.8 mm. COLOUR. Body integument black; vestiture of elytra consisting of elliptical scales, twice as long as wide, not concealing integument; scales pale or dark brown with scattered contrasting pearly green spots and an ill-defined transverse pale band on apical ⅔ of interstriae 1–3, mainly visible in females. HEAD. Rostrum longer than wide (w/l ratio: 0.77) in both sexes, as wide as base at apex, sides slightly concave near middle of length in dorsal view; epifrons as wide as width of eye, at base narrower than distance between eyes, sides subparallel, upper face with a longitudinal carina extending from basal transverse groove to nasal plate, visible through scales; nasal plate V-shaped, reaching level of antennal insertions basally, bare of scales, with only minute setae inserted in scattered punctures and 3 pairs of long setae apically near insertion of mandibles (2 short and 1 very long); antennal scrobes slightly curved in lateral view, directed to middle of eye, separated from it by a strip of scales slightly narrower than diameter of eyes; mandibles trisetose, bare of scales. Forehead with a short longitudinal furrow between eyes; recumbent and suberect scales arranged centripetally towards a point below base of eyes, in dorsal view; eyes protruding, surface almost conical in dorsal view. Antennae slender, scape 0.75 × as long as funicle, slightly bisinuate, subclavate at apex, exceeding anterior margin of prothorax in repose; funicle with segments 1–2 elongate, 1 very slightly shorter (0.95 ×) than 2, segments 3–6 longer than wide, conical, shortening apicad, segment 7 longer and slightly wider than 6; club spindle-shaped, segment 1 longer than 2, margins slightly sinuous. PROTHORAX. Wider than long (w/l ratio: 1.18), widest near middle of length, apical margin 0.6× as wide as basal margin, sides rounded, apical half slightly concave; integument densely punctate, spaces between punctures forming ill-defined concentric smooth ridges, upper face regularly convex, lacking carina or cuticular depression. ELYTRA. Sides convex, widest before middle of length (w/l ratio: 0.75–0.80), integument micro-punctate and weakly reticulate, shiny, interstriae raised, 2–3× as wide as width of striae in basal half; small declivital callosities present on apical ¼ of interstriae 3, 5 and 7; each interstria with 1–2 series of semierect elongate brownish scales, condensed on callosities. ABDOMEN. Underside with pearly green scales, scattered, not overlapping; ventrite 1 shorter than 2 +3+4, slightly convex in middle ( ♀) or concave with erect setae as long as claws (♂), ventrite 5 as long as 3+ 4, with sub-erect setae in middle and near apex ( ♀) or with a large cavity extending on apical ⁴⁄5, with long erect setae condensed on margin of cavity, forming two brushes at apical and basal margins, and a longitudinal line of erect setae in cavity, long in basal half and very short in apical half (♂) ( Fig. 3D). LEGS. Femora clavate, unarmed; tibiae straight, unarmed, slightly bisinuate on ventral side; claws simple, free, equal in length. GENITALIA. Body of penis elongate, 0.65 × as long as apodemes, sides convex, widest in basal ¼ (w/l ratio: 0.44), in lateral view curvature weak ( Fig. 2D); copulatory sclerite with left arm longer than body, not bearing setae at base; comb of right arm with setae converging, curved inward at apex; right area of body slightly wider than left area. Sexual dimorphism Males may be distinguished externally from females by the presence of a cavity and setae on ventrite 5. They usually lack a distinct transverse pale band on the elytra (visible on interstriae 1–3 infemales). Life history All known specimens of P. planithorax sp. nov.have been collected at the base of Hymenolepis crithmifolia(Asteraceae)and Carpobrotus edulis(Aizoaceae)plants, which are probably its host plants ( Fig. 4E–F). This species was not found on other plants present at the collection sites. Adults were collected in April and November.
Distribution This species is only known from several sites of the western slope of the Kogelberg Mountain.
Remarks
2640284350
2019-04-14
CBGP, SAMC
South Africa
-34.18038
Hymenolepis
1
18.830717
Gordons Bay
15
16
JHAR02264
1
1
Western Cape province
holotype
2640284315
CBGP
South Africa
Western Cape province
15
16
4
2
2
Western Cape province
holotype
2640284339
[458,1121,1902,1929]
SAMC
South Africa
Western Cape province
15
16
2
1
1
Western Cape
holotype
2640284305
2019-11-08
CBGP
South Africa
-34.168217
Gordons Bay
1
18.850784
15
16
6
6
Western Cape
paratype
2640284327
[624,1393,1971,1999]
South Africa
-34.186817
Sunbird
1
18.819233
Gordons Bay
15
16
12
12
Western Cape
paratype