Hebrus (Hebrus) atlas, Kment, Petr, Jindra, Zdeněk & Berchi, Gavril Marius, 2016

Kment, Petr, Jindra, Zdeněk & Berchi, Gavril Marius, 2016, Review of West-Palaearctic Hebridae with description of a new species and redescription of Hebrus fulvinervis (Hemiptera: Heteroptera), Zootaxa 4147 (3), pp. 201-239: 204-209

publication ID

http://doi.org/10.11646/zootaxa.4147.3.1

publication LSID

lsid:zoobank.org:pub:B54FCD54-7514-408D-9B6F-62BF3DE4DA66

persistent identifier

http://treatment.plazi.org/id/03BD2655-FFA3-D216-FF7C-FD24A75FE5E7

treatment provided by

Plazi

scientific name

Hebrus (Hebrus) atlas
status

sp. nov.

Hebrus (Hebrus) atlas   sp. nov.

( Figs. 1–22 View FIGURES 1 – 3 View FIGURES 4 – 12 View FIGURES 13 – 16 View FIGURES 17 – 22 , 65 View FIGURES 65 )

Type locality. Morocco, Middle Atlas   Mts., Tazzeka National Park, Bab-Bou-Idir env., 34°04′N 4°07′W. GoogleMaps  

Type material. Holotype: Ƌ (micropterous), ‘ MOROCCO, 28.v.-3.vi. / 1999. Tazzeka N.P., Bab- / Bou-Idir env., 34°04′N, / 4°07′W, P. Průdek leg. [p, white label] // EX COLLECTIO / Z. JINDRA, PRAGUE [p, white label] // Ƌ [p, white label] // HOLOTYPUS / HEBRUS   / ATLAS   sp GoogleMaps   . nov. / det. P. KMENT, Z. JINDRA / & G. M. BERCHI 2016 ’ (ZJPC, to be deposited in NMPC). Holotype card-mounted, complete.

Paratypes: 1 Ƌ (micropterous), ‘ MOROCCO, 28.v.–3.vi. / 1999. Tazzeka N.P., Bab- / Bou-Idir env., 34°04′N, / 4°07′W, P. Průdek leg. [p, white label] // EX COLLECTIO / Z. JINDRA, PRAGUE [p, white label] // Ƌ [p, white label] // ( ZJPC) GoogleMaps   ; 1 ♀ (micropterous), ‘ MOROCCO, 28.v.–3.vi. / 1999. Tazzeka N.P., Bab- / Bou-Idir env., 34°04′N, / 4°07′W, P. Průdek leg. [p, white label] // EX COLLECTIO / Z. JINDRA, PRAGUE [p, white label] // COLLECTIO / NATIONAL MUSEUM / Praha GoogleMaps   , Czech Republic [p, white label] // ♀ [p, white label]’ ( NMPC)   ; 1 Ƌ (micropterous), ‘ MAROCCO, 10 October 1993 / Ifrane env., cca 1600 m / 60 km S of Fes / P. Bílek lgt. [p, white label] // EX COLLECTIO / Z. JINDRA, PRAGUE [p, white label] // COLLECTIO / NATIONAL MUSEUM / Praha   , Czech Republic [p, white label] // Ƌ [p, white label]’ ( NMPC)   ; 1 ♀ (micropterous), ‘ MAROCCO, 10 October 1993 / Ifrane env., cca 1600 m / 60 km S of Fes / P. Bílek lgt. [p, white label] // EX COLLECTIO / Z. JINDRA, PRAGUE [p, white label] // ♀ [p, white label]’ ( ZJPC)   . All the paratypes bear the following labels: ‘ PARATYPUS / HEBRUS   / ATLAS   sp   . nov. / det. P. KMENT, Z. JINDRA / & G. M. BERCHI 2016 ’.

Description. Known only in micropterous form. Colouration ( Figs. 1–3 View FIGURES 1 – 3 ). Head and thorax reddish (with metanotal elevation somewhat darker) in males ( Figs. 1–2 View FIGURES 1 – 3 ), blackish brown (with head and pronotum posteriorly with reddish tinge) in females ( Fig. 3 View FIGURES 1 – 3 ). Remaining body parts with same colouration in both sexes. Eyes dark reddish. Bucculae yellowish. Legs and antennal segments I and II yellowish with apices somewhat infuscated; antennal segments III –IVb brownish. Corium blackish brown, concolorous with disc of pronotum; clavus with small white spot basally, rest of corium and entire membrane dark brown. Abdomen black, only apically somewhat reddish.

Vestiture. Pubescence on head, pronotum, sides of thorax, mesoscutellum and metanotal elevation (‘scutellum’) very short, in optical microscope indistinct (see Figs. 4–9 View FIGURES 4 – 12 ). Mandibular plates ( Fig. 7 View FIGURES 4 – 12 ), corium, clavus posteriorly ( Fig. 10 View FIGURES 4 – 12 ), abdomen dorsally and ventrally ( Figs. 4, 10 View FIGURES 4 – 12 ), apical thirds of femora ( Fig. 11 View FIGURES 4 – 12 ), tibiae ( Fig. 11 View FIGURES 4 – 12 ), tarsi ( Fig. 12 View FIGURES 4 – 12 ), and antennal segments ( Figs. 13–14 View FIGURES 13 – 16 ) with longer pale hairs appearing silver or gold.

Structure. Body elongate ( Figs. 1–4 View FIGURES 1 – 3 View FIGURES 4 – 12 ), 2.63–2.70 times longer than wide across humeral angles, but body widest across gibbose metapleura (see Measurements). Vertex with median sulcus shallow, hardly visible in optical microscope ( Figs. 4, 6 View FIGURES 4 – 12 ). Bucculae low, ventrally straight, posteriorly conically produced ( Fig. 7 View FIGURES 4 – 12 ); head laterally with prominent oblique ridge running from base of antenniferous tubercle to postero-ventral margin of eye ( Fig. 7 View FIGURES 4 – 12 ). Labium not observed on card-mounted specimens. Antennal segment I stoutest, cylindrical, slightly curved ( Fig. 13 View FIGURES 13 – 16 ); segment II clavate ( Fig. 13 View FIGURES 13 – 16 ); segments III, IVa and IVb terete ( Figs. 1 3–14 View FIGURES 1 – 3 View FIGURES 4 – 12 View FIGURES 13 – 16 ). Antennal segments from longest to shortest ( Figs. 13–14 View FIGURES 13 – 16 ): I> III> IVb> II> IVa; segment I 1.3 3–1.50× longer than II as well as maximum width of compound eye; segment IV divided by membranous junction into IVa and IVb ( Figs. 15–16 View FIGURES 13 – 16 ). Pronotum ( Figs. 1–4, 8 View FIGURES 1 – 3 View FIGURES 4 – 12 ) transversely hexagonal, anterior collar not delimited posteriorly, middle transverse constriction well developed, especially laterally. Metanotal elevation shortly trapezoid, about 2.9× wider than long, posteriorly widely obtusely arcuate, without any incision ( Figs. 8–9 View FIGURES 4 – 12 ); disc of metanotal elevation with low median carina accompanied by two shallow submedian depressions ( Figs. 8–9 View FIGURES 4 – 12 ), not turned upwards posteriorly ( Fig. 5 View FIGURES 4 – 12 ). Metapleuron strongly gibbose, therefore metathorax slightly wider than pronotum across humeral angles ( Figs. 1, 3 View FIGURES 1 – 3 , 8 View FIGURES 4 – 12 ). Hemelytra ( Fig. 10 View FIGURES 4 – 12 ) reaching posterior margin of mediotergite II ( Figs. 1–4 View FIGURES 1 – 3 View FIGURES 4 – 12 ). Metafemur of male strongly curved ( Figs. 1–2 View FIGURES 1 – 3 , 11 View FIGURES 4 – 12 ), only indistinctly curved in female ( Fig. 3 View FIGURES 1 – 3 ), metatibiae of both sexes straight, without long hairs ( Figs. 1–3 View FIGURES 1 – 3 , 11 View FIGURES 4 – 12 ). Mediotergites I and II with two thin, submedian, posteriad slightly diverging longitudinal keels ( Figs. 3–4 View FIGURES 1 – 3 View FIGURES 4 – 12 ). Male genitalia: Pygophore elliptic in dorsal view ( Figs. 17–18 View FIGURES 17 – 22 ); proctiger large, posteriorly oval ( Figs. 19–20 View FIGURES 17 – 22 ), distinctly protruding posteriad ( Figs. 17–18 View FIGURES 17 – 22 ); paramere with group of long setae apically ( Fig. 21 View FIGURES 17 – 22 ); aedeagus as in Fig. 22 View FIGURES 17 – 22 .

Measurements (mm). Micropterous form. Male / female (n = 2; holotype, paratype / 3 (for antennal segments III –IVb n = 2); median (minimum –maximum)). Body length: 1.62, 1.74 / 1.82 (1.76–1.92). Pronotum: anterior width: 0.38, 0.40 / 0.40 (0.40–0.42), humeral width: 0.61, 0.65 / 0.69 (0.67–0.71). Metathorax: maximum width across metapleura: 0.63, 0.71 / 0.71 (0.71–0.75). Lengths of antennal segments: I: 0.24, 0.24 / 0.24 (0.24–0.26), II: 0.16, 0.18 / 0.18 (no span), III: 0.24, 0.24 / 0.26–0.28, IVa: 0.14, 0.14 / 0.12–0.14, IVb: 0.20, 0.20 / 0.20–0.22). Length of metafemur: 0.52, 0.48 / 0.52 (0.50–0.53), metatibia: 0.61, 0.65 / 0.67 (0.61–0.67), metatarsus: 0.22, 0.26 / 0.24 (0.24–0.26).

Variation. There is remarkable sexual dimorphism in colouration (head and thorax reddish in males, blackish brown in females) and shape of the metafemora (curved strongly in males, only indistinctly in females). Concerning individual variability in colouration, we noticed only the different shade of colouration of the metanotal plate in the three males examined, varying from reddish ( Fig. 2 View FIGURES 1 – 3 ) to dark reddish brown ( Fig. 1 View FIGURES 1 – 3 ).

Differential diagnosis. Hebrus atlas   sp. nov. most resembles the three Palaearctic species of Hebrus   with known short-winged ( H. fulvinervis   , H. ruficeps   ) or wingless form ( H. franzi   ), but it differs especially in the following unique combination of characters: Antennal segment IV subdivided by a membranous joint (fully divided in H. fulvinervis   and H. ruficeps   , undivided in H. franzi   according to Cianferoni et al. 2016), head laterally with narrow ridge above bucculae (unique character), sexual dichroism in colouration of head and thorax, body widest across gibbose metapleura (body widest across humeral angles of pronotum in H. fulvinervis   and H. ruficeps   , across abdomen in H. franzi   ), short-winged form micropterous with hemelytra reaching posterior margin of mediotergite II (reaching posterior margin of mediotergite I in H. ruficeps   and mediotergite IV in H. fulvinervis   ), and metafemur of male strongly curved (straight in H. fulvinervis   and H. ruficeps   , slightly curved in H. franzi   ). Hebrus iheriri Poisson, 1953   , the only North African species of the subgenus Hebrusella   , is known only as macropterous females but it should differ in the antennal segment IV fully divided and colouration of entire body yellowish ( Poisson 1953). Despite the lack of knowledge of other important characters potentially distinguishing H. atlas   and H. iheriri   , we consider the possibility that H. atlas   is the micropterous form of the latter as improbable.

Three micropterous Afrotropical species of Hebrus   are known, all with shortened metanotal elevations (a character apparently related to reduction of wings): H. aristomides Linnavuori, 1981   ( Nigeria) and H. gembuanus Linnavuori, 1981   ( Nigeria), both originally assigned to the subgenus Hebrus   s. str. ( Linnavuori 1981) and H. leleupi Cobben, 1982   ( Democratic Republic of the Congo) described without subgeneric placement but regarded closely related to H. gembuanus ( Cobben 1982a)   . Hebrus aristomides   differs among others in shape of the bucculae, rudiments of the hemelytra shorter than the metanotal elevation, metanotal elevation 3.2× wider than long, shape of the parameres, and colouration of the head, pronotum and scutellum blackish with bluish metallic lustre ( Linnavuori 1981).

Hebrus gembuanus   and H. leleupi   resemble H. atlas   in the shape of the bucculae and presence of a lateral keel on the head, and H. gembuanus   also in orangish to reddish brown colouration of head and thorax. However, both H. gembuanus   and H. leleupi   differ in larger body size ( H. gembuanus   2.50–2.75 mm, H. leleupi   2.10–2.30 mm); upper surface densely covered with very long, erect bristles and adpressed, pale pubescence; scutellum with broad, U-shaped apical insinuation; rudiments of hemelytra ligulate; femora incrassate, straight; and metatibiae with a row of very long bristles. Hebrus gembuanus   also differs in the orangish colouration of abdominal dorsum, whereas the cavicolous H. leleupi   has the entire body unicolorous pale brownish ( Linnavuori 1981, Cobben 1982a).

Etymology. Atlas   (genitive Atlantis   , masculine) the giant of ancient Greek mythology bearing the Cope of Heaven, as well as the northwest African Atlas   Mountains named after him, the homeland of the new species. The species name is noun in apposition.

Habitat. Unknown.

Distribution ( Fig. 65 View FIGURES 65 ). Africa: Morocco: Al-Atlas al-Mutawassit [= Middle Atlas   ] Mts. (this paper).

Subgeneric placement. Despite the strong superficial resemblance of H. atlas   to H. fulvinervis   and H. ruficeps   , which are currently classified in the subgenus Hebrusella   due to the fully divided antennal segment IV, H. atlas   has antennal segment IV subdivided by membranous joint and should be placed in the subgenus Hebrus   s. str. as defined by Poisson (1944). This may suggest relationships of the new species to some of the Afrotropical species of Hebrus   s. str, such as H. gembuanus   or H. leleupi   . Unfortunatelly, the subgeneric classification of Hebrus   is problematic and requires revision (see Summary).

NMPC

National Museum Prague

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Hemiptera

Family

Hebridae

Genus

Hebrus