Pseudohenschiella hauseri, Baňař & Štys, 2006

Baňař, Petr & Štys, Pavel, 2006, A new species of Pseudohenschiella (Heteroptera: Enicocephalidae) from Madagascar, Acta Entomologica Musei Nationalis Pragae 46, pp. 7-14 : 8-13

Pseudohenschiella hauseri sp. nov.

( Figs. 1-13 )

Type locality. Madagascar, Antananarivo prov., Ankaratra hills, Manjakatompo Forest Station, 1980 m a.s.l.

Type material. HOLOTYPE: ♀, ‘Mad-89/23: Madagascar (Prov. / Antananarivo, sous-préf. / Ambatolampy): Massif Ankaratra, / Station Forestière Manjakatompo , / près du sommet du Anosiarivo, foręt / primaire, sous écorces, 1980m; / 26.xi. 1989; leg. B. Hauser’. The specimen bears the red type label ‘ HOLOTYPE / Pseudohenschiella / hauseri sp.nov. / Baňař & Štys det. 2006’. Holotype slightly damaged (midtibiae partially broken), card-mounted, right foreleg mounted separately on another card; to be deposited in the collection of Muséum d’Histoire Naturelle , Geneva ( Switzerland) .

Description. Measurements (all in mm; L = length, W = width, max. = maximum, min. = minimum). Total L – 2.75; head: anterior lobe L – 0.26, posterior lobe L – 0.18, posterior lobe W – 0.25, distance of eye to apex of antennifer – 0.13, diatone (max. W across eyes) – 0.24, min. interocular distance, dorsal – 0.15, min. interocular distance, ventral – 0.11, eye L – 0.08; labium: total L – 0.44; antenna: segment 1 L – 0.11, segment 2 L – 0.24, segment 3 L – 0.22, segment 4 L – 0.21; pronotum: total L (max.) – 0.46, collum L (median) – 0.13, midlobe L (max.) – 0.19, hindlobe L (max.) – 0.14, collum max. W – 0.26, midlobe, max. W – 0.46, hindlobe, max. W – 0.53; foreleg: forefemur L – 0.40, foretibia L – 0.33, forefemur max. W – 0.18, foretibia max. W – 0.16; midleg: midfemur L – 0.35, midtibia L – 0.30, midtarsus L (without claw) – 0.11, midfemur max. W – 0.10, midtibia max. W – 0.07, midtarsus max. W – 0.05; hindleg: hindfemur L – 0.42, hindtibia L – 0.48, hindtarsus L (without claw) – 0.16, hindfemur max. W – 0.13, hindtibia max. W – 0.08, hindtarsus max. W – 0.03.

Coloration ( Fig. 1 ). Head and thorax brown; forewing membrane slightly paler, extreme apex of head, labium, forewing veins, legs and antennal segments 1-3 yellowish brown, posterior (inner) faces of femora somewhat infuscate; antennal segment 4 whitish; dorsum and venter of abdomen beige (small isolated sclerites brown).

Cuticle. Head, thorax and abdomen generally matt, with clearly visible punctation and minute setigerous tubercles; legs (with some exceptions – see foreleg structures below), antennae, labium and small median impression on midlobe of pronotum smooth and lustrous. Head, thorax and extremities strongly sclerotized, abdomen weakly so.

Vestiture whitish, relatively dense. Setae on dorsal face of head prominent, curved anterad, becoming longer towards antennifers. Lateral faces nearly bare. Setae on ventral face of head ( Fig. 2 ) strongly prominent, longer than setae on dorsal and ventral faces; on anterior lobe curved posterad, on posterior lobe curved anterad (excepting the basal part, adjoining the collum).

Collum covered by dense hairs curved irregularly in different directions. Dorsal and lateral parts of mid- and hindlobe of pronotum and ‘pleural’ parts of thorax covered with dense prominent hairs, these becoming longer ventrally; setae of both dorsum and venter of thorax directed caudad.

Abdomen with adpressed hairs, laterotergites 7-9 with several very long, trichobothria-like setae, sternum 7 and subgenital plate covered with long, dense, semi-erect setae.

Forewing veins pilose, cells bare, very rarely with one seta per cell. Wing margin of four distinct sectors differing in pilosity, as follows: (a) proximal half of anterior margin with one row of uniform, short, curved setae; (b) third quarter of anterior margin with same hairs as (a) but complemented by second row of longer, curved hairs, both rows becoming longer distad; (c) beginning of distal quarter of anterior margin with admixed third row of erect bristles, the latter shortly disappearing and the rest of anterior margin, whole apical margin, and distal part of posterior margin (up to entry of last remigial vein) formed by one row of slightly curved, diagonal, alternating short and very long hairs; (d) whole proximal part of posterior margin bare.

Antennae. All segments with rather long diagonal setae; distal part of segment 2 and whole segments 3 and 4 also with more erect, subvertical, long, fine setae about twice as long as segment diameter.

Labium with dense, semi-erect, slightly curved pilosity, particularly long and conspicuous at dorsal surface of segment 3.

Forelegs with two types of setae: (a) long, prominent trichobothria-like setae (tr-setae); (b) shorter, semi-erect, denser setae. Coxa and trochanter antero- and posteroventrally with numerous (ca 20-30) semi-erect setae and several (3-5) tr-setae. Dorsal face of trochanter with rows of five setae, one longest, other four subequal in length. Femur and tibia covered more densely and regularly on all surface, with exception of small bare area on antero-basal part of femur. Femur with 15-20 regularly distributed tr-setae with exception of anterior face. Tibia with 10-12 tr-setae, distributed especially on posterodorsal face, tarsus with 4-5 tr-setae.

Mid- and hindlegs. Both the mid- and hindfemur with a conspicuous, outstanding, curved and long setae in two thirds of dorsal face, ventral face with shorter, adpressed setae. Mid- and hindtibiae and tarsi with dense, semi-erect setae on all faces.

Head ( Fig. 2 ). Slightly shorter than pronotum (ratio 0.95). Anterior lobe cylindrical, longer than posterior lobe (ratio 1.44). Postocular constriction deep. Posterior lobe transverse, lateral margins irregularly rounded, with slightly visible median groove, widest in basal third, ratio length to maximum width 0.72. Ratio length of eye to distance eye – apex of antennifer 0.62. Eyes medium-sized, dark reddish brown. Ocelli on small tubercles, directed anterolaterad, each with narrow carmine ringlet on base. Dorsal ocular index 5.3, ventral ocular index 3.7. Neck very short.

Antennae ( Fig. 1 ) relatively short and thin, shorter than head and pronotum together, antennal formula (longest segment first): 2-3-4-1 (length differences 2, 3, 4 very small). Segments 2 and 3 moderately subfusiform, 4 fusiform.

Labium ( Fig. 2 ) very short, thick, directed anterad, labial formula (longest segment first) 3-4-2-1, segment 1 minute, 3 basally constricted, and with medially inflated ventral side.

Pronotum ( Fig. 1 ). Collum thick, simple, without lateral tubercles, precollum narrow, transverse impression between collum and midlobe strikingly deep and wide, broadly V-shaped. Lateral margins of midlobe rounded, its median marked by broad, inversely T-shaped impression (its stalk shallow, interrupting anterior margin; its transverse bar deep, rounded, distant from posterior margin), disc with a pair of deep anterolateral pits; lateral and medial parts of posterior margin rounded, sublateral ones shallowly concave. Hindlobe moderately wider than midlobe, widest in middle, lateral sides very moderately rounded, posterolateral angles roundedly subrectangular, posterior margin shallowly concave.

Mesoscutellum large, triangular, disc elevated with anterior row of 2+2 muscle impressions and unpaired posterior impression, apex produced in rounded mucro.

Fore acetabula open, ‘proepimeral lobe’ (cum posterior prosupracoxale) reaching half width of forecoxa.

Terminalia. Segment 8 clearly subdivided into fully sclerotized tergum, incompletely sclerotized laterotergites (occupying truly lateral position), and ventral, sclerotized subgenital plate. Posteromedial margin of the latter emarginate, the space filled by intersegmental membrane 8-9 provided with small medial sclerite. Segment 9 ring-shaped, fully sclerotized, its ventral (subproctigeral) part narrow. Proctiger globular.

Differential diagnosis. Pseudohenschiella hauseri sp. nov. differs from P. minuscula Villiers, 1969 by longer body, wider foretibia, and shape of posterior lobe of head and collum (very short in P. minuscula ); from P. usingeri and P. flavipes Villiers, 1969 by wider foretibia, different dimensions and shape of both mid- and hind- pronotal lobes, and non-opposite position of transverse veins associated with forewing discal cell; from P. brevipes Villiers, 1958 by longer collum, different shape and proportions of posterior lobe of head, and by different shape of forewing discal cell (see the Key, and VILLIERS 1969). Dimensions of fore tibia may be sexually dimorphic (tibia distally broader in females); so far all species are only known from single individuals.

Etymology. Named after Bernd Hauser (Geneva), collector of the species.

Bionomy. The holotype was collected under bark in a primary forest.

Figures

Figs. 1-4. Pseudohenschiella hauseri sp. nov., holotype, female. 1 – total view; 2 – head, lateral view; 3 – right foretibia, anterior view; 4 – ventral face of right forefemur.

Figs. 5-7. Pseudohenschiella hauseri sp. nov., holotype, female. 5 – right foreleg, anterior view; 6 – apex of tibia and tarsus, hairs omitted; 7 – coxa; 8 – coxal rim organ.

Figs. 8-13. Pseudohenschiella hauseri sp. nov., holotype, female, right foreleg (8-11 anterior view, 12-13 posterior view). 8 – trochanter and base of femur (cleared, vestiture omitted except coxal guard setae); 9 – condylar trochanteral organ; 10 – anterior trochanteral organ; 11 – anterior femoral organ; 12 – trochanter and base of femur (cleared, vestiture omitted except coxal guard setae); 13 – posterior trochanteral organ.