Polana (Hobemanella) alvarengai, Domahovski & Cavichioli, 2018

Domahovski, Alexandre Cruz & Cavichioli, Rodney Ramiro, 2018, Two new species of Polana (Hobemanella) (Hemiptera: Cicadellidae: Gyponini) and key to species, Zoologia (e 13882) 35, pp. 1-8 : 2-4

Polana (Hobemanella) alvarengai sp. nov.

http://zoobank.org/ B9DCF6A7-4086-428C-8186-29056EEC4785

Figs 1–14

Diagnosis. Style ( Fig. 8) elongated; blade with same height along entire length, ventral margin not serrated, apex slightly curved dorsally with apical tip. Aedeagal shaft ( Figs 9, 10) with subapical group of eight spine-like processes on each side of shaft on ventral surface.

Description.Male length 7.1–7.6 mm, female length 7.8 mm.

Head ( Fig. 1), in dorsal view, with transocular width 4 / 5 humeral width of pronotum. Head ( Fig. 2), in lateral view, with clypeus slightly inflated and frons slightly rounded. Head ( Fig. 3), in frontal view, with face wider than long; clypeus as long as wide, lateral margins slightly convergent apically, apex straight; maxillary plates produced ventrally as far as clypeus apex; gena with ventrolateral margins slightly rounded; frons approximately 1.1 times longer than wide, not excavate below anterior margin of crown; frontogenal suture distant from eye margin by short distance, approximately equal to scape diameter, and reaching antennal ledges, antennal ledge carinate and transverse. Forewing ( Figs 1, 2) without extra cross veins; appendix developed and involving first and second apical cells, as wide as maximum width of first apical cell. Foreleg with profemur, in frontal view, 3.5 times longer than high; profemur AV row with five or six setae and PV rows absent; protibia more or less cylindrical, with a longitudinal carina adjacent to PD row; protibia AV row formed by long setae, gradually increasing in thickness and length toward apex; AD formed by many small setae; PD row with four long setae; PV row developed, with very small setae near base and four or five long setae on apical two-thirds. Hind leg with femoral setal formula 2:2:1; metatibia AD row with intercalary setae between macrosetae; PV row with setae of apical half formed by sequence of a thicker and three thinner setae; first tarsomere with two rows of setae on plantar surface, median row distinctly smaller in length than external row; apex with four platellae; second tarsomere apex with two apical platellae. Other characteristics as in subgeneric description.

Coloration. Head and thorax ( Figs 1, 2) pale brown. Crown ( Fig. 1) without maculae. Face ( Fig. 3) without maculae. Pronotum ( Fig. 1), in dorsal view, with small rounded black spot behind each eye at one-third length of disk; in lateral view ( Fig. 2), proepimeron with narrow and elongated black macula just below pronotal carina. Mesonotum without maculae. Forewings ( Figs 1, 2) pale brown with brown transversal stripe on apical third and five small black spots: one on base, near humeral angle; two on clavus, on apex of each anal vein; and two on corium, on each cross vein of discal cell. Legs pale brown.

Male terminalia. Sternite VIII ( Fig. 4) approximately as wide as long; posterolateral corners rounded; posterior margin with middle portion strongly produced and rounded. Pygofer ( Fig. 5) about 1.4 times longer than maximum height; macrosetae dispersed on posterodorsal quadrant; dorsal margin with short basal process; ventral margin rounded and with hair-like setae; posterodorsal margin straight and with small V-shaped notch at apex; posterior margin infolded. Subgenital plate ( Figs 5, 6) short, in lateral view, produced posteriorly only as far as half length of pygofer; in ventral view, approximately 2.7 times longer than wide; maximum width at mid-portion; internal margin rounded; external margin rounded and with hair-like setae; apex rounded. Connective ( Fig. 7) Y-shaped, with rami as long as stalk; stalk short and wider apically, approximately as long as wide. Style ( Fig. 7), in dorsal view, with outer lobe reduced and truncated; in lateral view ( Fig. 8), elongated, blade with same height along entire length, ventral margin not serrated, apical third slightly curved dorsally; apex with apical tip directed dorsally. Aedeagus ( Figs 9, 10) with preatrium reduced; dorsal apodeme rounded, not developed laterally; atrial processes curved dorsally, not as long as shaft apex, in lateral view, wide near base and tapered toward apex, with lateral carina, apex acute; shaft curved dorsally near base, subapical group of eight spine-like processes on each side of shaft on ventral surface; apex flat and twisted to right side.

Female terminalia. Sternite VII ( Fig. 11) approximately 1.6 times wider than long; posterolateral angles rounded and produced; posterior margin deeply excavated laterad of median lobe and with apex tapered, occupying median third and distinctly produced posteriorly beyond lateral angles. Pygofer ( Fig. 12) about 1.8 times longer than maximum height, apex broadly rounded; macrosetae dispersed on dorsoapical fourth and ventroapical half. Internal sternite VIII membranous. First valvifer ( Fig. 13) 1.4 times higher than long; external surface with many minute setae. First valvulae ( Fig. 13) slightly curved dorsally; basal portion developed anterad and truncated; apical third with dorsal sculptured area strigate; apex tapered abruptly and serrated laterally. Second valvulae ( Fig. 14) with greatest height posterior to middle portion; dorsal margin without teeth; apex narrowed and acute.

Material examined. Holotype male: “Vilhena, Rondônia \ Brasil XI-1960 \M. Alvarenga”, DZUP. Paratypes: 1♀, same data of holotype, DZUP ; 1♂, “Vilhena, RO [Rondônia]\ 27/12/1986 \ C. Elias, leg.\Polonoroeste”, DZUP ; 2♂, “ Sinop , Mato Grosso \ Brasil X/1975 \ M. Alvarenga ”, DZUP ; 2♂, same data, DZRJ ; 2♂, same data, MNRJ ; 1♂, “ Jacareacanga \ Pará Brasil X-1969 \ M. Alvarenga leg.”, DZUP .

Remarks. Polana (H.) alvarengai sp. nov. is most similar to P. (H.) orbita by the very similar shape of style and the apex of aedeagal shaft recurved. However, it can be easily distinguished by the pygofer without internal processes ( Fig. 5) and the aedeagal shaft with two subapical groups of eight spine-like processes ( Figs 9, 10).

Etymology. The new species name is an honor of Moacir Alvarenga, Major of the Brazilian Air Force, great collector of insects, whose inestimable material, collected on decades of 1950–1980 in areas which today are degraded, is still the basis for many scientific studies.