Rhinusa incana (Kirsch, 1881)
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https://dx.doi.org/10.3897/zookeys.1195.112328 |
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lsid:zoobank.org:pub:617FBE9C-72D1-479D-8336-1E9325D74B93 |
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https://treatment.plazi.org/id/7FE726F9-3AE0-57FC-8E3F-1B3D0F9F8014 |
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Rhinusa incana (Kirsch, 1881) |
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11) Rhinusa incana (Kirsch, 1881)
Material examined.
5 mature larvae. Italia, Sicilia, San Cono , ex Linaria multicaulis (L.) Mill., 06.05.2017, leg. C. Baviera, det. R. Caldara.
Description of mature larva
(Figs 51A, B View Figure 51 , 52A-E View Figure 52 , 53A-C View Figure 53 ). Measurements (in mm). Body length: 2.25-3.00 (avg. 2.50). The widest place in the body (meso- and metathorax) measures up to 1.50. Head width: 0.60-070 (avg. 0.65).
General. Body elongate, slender, slightly curved, rounded in cross section (Fig. 51A View Figure 51 ). All thoracic segments equal in size. Meso- and metathorax each divided dorsally into two folds (prodorsal fold smaller than postdorsal fold). Pedal folds of thoracic segments isolated, conical. Abdominal segments I-V of similar size, next segments tapering towards posterior body end. Abdominal segments I-VII each divided dorsally into two folds: postdorsal folds much higher than prodorsal folds. Segments VIII and IX dorsally undivided. Epipleural folds of segments I-VIII conical. Laterosternal and eusternal folds of segments I-VIII conical, well isolated. Abdominal segment X divided into four folds of equal size. Anus situated ventrally, hidden in ninth segment.
Thoracic and abdominal spiracles unicameral; thoracic spiracles (Fig. 51A View Figure 51 ) placed laterally close to mesothorax; abdominal spiracles (Fig. 51A View Figure 51 ) placed medially on segments I-VIII.
Colouration. Yellow to brown head, medial parts of epicranium less sclerotised (Fig. 51B View Figure 51 ). All thoracic and abdominal segments whitish, covered with fine asperities (Fig. 51A View Figure 51 ).
Vestiture. Setae on body thin, transparent, different in length (minute to long).
Head capsule (Figs 51B View Figure 51 , 52A View Figure 52 ). Head slightly narrowed bilaterally, endocarinal line present, reaching to 3/4 length of frons. Frontal sutures on head partially indistinct, very wide. Frons covered with knobby, dark asperities. Two pairs of stemmata in the form of small black spots (st) placed laterally. Des1 very short, located in middle part of epicranium; medium des2 located anteriorly; long des3 placed almost on the border of the frontal suture; minute des4, located laterally; and elongated des5 placed close to stemma (Fig. 52A View Figure 52 ). Fs1 minute, located posterolaterally; fs2 and fs3 minute; fs4 medium, located anteriorly; and long fs5 located anterolaterally, close to antenna (Fig. 52A View Figure 52 ). Les1 and les2 medium; two short ves. Epicranial area with three pes.
Antennae placed distally of the frontal suture, on the inside; membranous and distinctly convex basal article bearing one conical elongate sensorium, plus two sensilla basiconica (Fig. 52B View Figure 52 ).
Clypeus (Fig. 52C View Figure 52 ) trapezoidal, ~ 2.7 × as wide as long with two medium cls, localised posterolaterally, with one sensillum between them; anterior border straight.
Mouth parts. Labrum (Fig. 52C View Figure 52 ) ~ 2.4 × as wide as long, with three piliform lrs, various long; lrs1 elongated, placed posteromedially, lrs2 elongated, located anteromedially, lrs3 medium, located anterolaterally; anterior border bi-sinuate. Epipharynx (Fig. 52C View Figure 52 ) with two elongated finger-like als, almost identical in length, two piliform ams variable in length and two finger-like mes variable in length; labral rods (lr) distinct, elongated. Mandibles (Fig. 52D View Figure 52 ) bifid, with two medium piliform mds, both located close to lateral border. Maxillolabial complex: maxilla brownish sclerotised (Fig. 52E View Figure 52 ) stipes with one stps, two pfs and one relatively long mbs and one sensillum, stps and both pfs1-2 elongated; mala with five finger-like dms variable in length, placed in two groups (three + two); four piliform, vms, medium to short in length. Maxillary palpi two-segmented; basal palpomere slightly wider than distal one; basal palpomere with short mpxs and single sensillum, terminal receptive area of distal palpomere with a group of five or six apical sensilla; basal and distal palpomeres almost of the same length. Prementum (Fig. 52E View Figure 52 ) close to cup-shaped, with one long prms; ligula with distinctly sinuate margin and two ligs variable in length; premental sclerite well sclerotised, U-shaped. Labial palpi one-segmented; palpi with single pore; terminal receptive area with four or five apical sensilla (ampullacea); surface of labium smooth. Postmentum (Fig. 52E View Figure 52 ) with three pms, elongated pms1 located posteromedially, long pms2 located mediolaterally, and medium pms3 located anterolaterally; membranous area smooth.
Thorax. Prothorax (Fig. 53A View Figure 53 ) with eight prns (four relatively long and four short); two elongated ps; and single short eus. Mesothorax (Fig. 53A View Figure 53 ) with minute prs, single short and two medium pds; one minute as; three minute ss; two long eps; single long ps; and single minute eus. Chaetotaxy of metathorax (Fig. 53A View Figure 53 ) almost identical to that of mesothorax. Each pedal area of thoracic segments with six relatively long pda.
Abdomen. Segments I-VIII (Fig. 53B, C View Figure 53 ) with one minute prs (segment VIII without); four medium pds; one minute and one medium ss; three medium eps; one medium ps; one medium lsts; and two minute eus. Abdominal segment IX (Fig. 53C View Figure 53 ) with two short and one minute ds; one medium and one minute ps; and two minute sts.
Remarks and comparative notes.
This species is distributed in the Iberian Peninsula, in southern Italy and Sicily, and in the western part of North Africa ( Alonso-Zarazaga et al. 2023). It is very closely related to R. neta , from which it can be separated at adult stage by a few but constant characters (shape of the female rostrum, antennae inserted slightly more towards the base of the rostrum in both sexes, and scales of the dorsal vestiture slightly thinner).
Biological notes.
This species was collected in Sicily inside the seed capsules of Linaria multicaulis subsp. aetnensis Giardina and Zizza, L. multicaulis subsp. humilis (Guss.) De Leon. ( Baviera and Caldara 2020) and L. striata (Lam.) DC. ( Goggi 2004). In Algeria, its development occurs inside the seed capsules of L. baborensis Batt. and L. heterophylla Desf. ( de Peyerimhoff 1911).
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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