Chonosia septentrionala Sanborn & Heath 2014, sp. n.

Chonosia septentrionala Sanborn & Heath, sp. n.

(Figure 15)

Chonosia septentrionala nom. nud. Sanborn et al. 2011a, p. 4 –5, Tables 2–3.

Type material.— ARGENTINA. HOLOTYPE: male (INHS), “ Tucuman / Dto. Trancas. Ruta 9 / ca. Trancas. 17–I–1988 / J.E. & M.S. Heath, Al / Sanborn & F. Noriega Coll. ”. PARATYPES: one male and one female (MSHC) same data as holotype; two male (MSHC) “ Catamarca / Ruta 40. 1 km No. of / Rio Salado. 20–I–1988 / J.E. & M.S. Heath, Al / Sanborn & F. Noriega Coll. ”; one male (MSHC) “ La Rioja / Dto. San Blas de los / Sauces. Salicas / 20 Jan. 1988 / Heath / Sanborn-Noriega Coll.”.

Etymology. The species is named for northern distribution of the species compared to its congeners.

Diagnosis.— Male specimens of C. septentrionala sp. n. can be differentiated by the length of their opercula which reach to the middle of sternite III. The opercula of Chonosia longiopercula sp. n. extend to sternites V and VII, while the opercula of C. papa (Berg, 1882) rev. stat., C. atrodorsalis, and C. crassipennis do not reach the posterior of sternite II. Females can be differentiated by their larger body size (about 30 mm) from C. atrodorsalis Torres, 1945 (about 24 mm) and C. trigonocelis Torres, 1945a (about 26 mm). The notch on the posterior of sternite VII of C. septentrionala sp. n. is circular, has parallel sides in C. longiopercula sp. n., has parallel sides posteriorly with a circular anterior terminus in C. papa, and the notch expands anteriorly into a tear drop shape in C. crassipennis (Walker, 1858).

Description

Coloration.—Ground color ferruginous and tawny marked with piceous.

Head.—Head 1.26–1.32X as wide as mesonotum. Head with laterally fuscous and medially piceous transverse mark between eyes enclosing ocelli, expanding anteriorly to central frontoclypeal suture and posteriorly to posterior margin of head. Mark extends along anterior margin of eye to transverse mark across gena to antenna fusing with fuscous mark on lateral supra-antennal plate. Posterior to eye fuscous. Ocelli rosaceous, eyes greenish tawny. Dorsum covered with short silvery pile, long silvery pile on posterior head and posterior to eye. Postclypeus fuscous, rounded anteriorly, with ventral central sulcus and 12 transverse grooves, transverse ridges ferruginous, tawny central strip on midline, lateral margin, and posterolateral junction with anteclypeus. Silvery pile laterally, within lateral transverse grooves, and within central sulcus, white pruinosity laterally. Anteclypeus piceous with long white pile and white pruinosity. Mentum tawny, labium ferruginous medially, piceous laterally and on tip, reaching beyond posterior coxae. Gena tawny with central fuscous stripe between postclypeus and eye. Lorum ferruginous with tawny anterolateral corner. Long white and short silvery pile and white pruinosity on gena and lorum. Scape and pedicel ferruginous with tawny junction, flagellar segments piceous.

Thorax.—Pronotum ferruginous with tawny anterior margin and midline. Piceous on disc medial to paramedian fissures connected across midline, and on anterior, central and posterior disc between paramedian and lateral fissures. Posterior mark curving mediad fusing on midline. Ambient fissure mark extending lightly onto anterior midline of pronotal collar. Marks on anterior and central disc between lateral and ambient fissures. Lateral mark extends onto medial portion of pronotal collar lateral margin and along ambient fissure fusing with mark across posterior disc between posterior paramedian fissure and posterior lateral fissures. Pronotal collar tawny, fuscous along posterior margin and posterior margin of lateral angle. Pronotum covered with silvery pile. Mesonotum ferruginous with piceous submedian sigillae except central lateral portion along parapsidal suture. Mark in lateral sigillae extends onto posterolateral mesonotum. Medial mark extends posteriorly from anterior margin, expands to medial side of scutal depression, constricts between anterior arms of cruciform elevation, and terminates on anterior disc of cruciform elevation. Anterior arms of cruciform elevation with longitudinal fuscous mark on anterior surface. Wing groove ferruginous medially, tawny laterally. Short, silvery pile covering dorsum, white pruinosity laterally, between anterior arms of cruciform elevation, surrounding scutal depression, and within wing groove. Metanotum ferruginous with white pruinosity. Ventral thoracic plates fuscous except tawny lateral and posterior anepisternum 2 and epimeral lobe and ferruginous lateral anepimeron 2 and basisternum 3. Venter covered with long white pile and white pruinosity.

Forewing and hind wings.—Hyaline. Venation tawny proximally, becoming ferruginous distally with light infuscation along veins, fuscous between costa and radius + subcostal vein. Basal cell, cubital cell and proximal third of clavus clouded with tawny. Basal membrane reddish gray. White pruinosity in basal cell, along cubital cell, in proximal clavus. Hind wing venation tawny except ochraceous radius posterior, veins margined with infuscation. Vanal fold, anal cell 3, anal cell 2 along anal veins 2 and 3, anal cell 1 along anal vein 2 and proximal one fourth of anal vein 1, and proximal cubital and radial cell reddish gray, reddish in anal cells 2 and 3 distally margined with infuscation.

Legs.—Tawny marked with fuscous and ferruginous, articulations bright red in one paratype. Coxae, trochanter and femora ferruginous striped with fuscous. Fore femur with primary spine almost parallel to femur and larger, upright secondary spine, spines tawny with fuscous tips along tawny ridge. Tibiae and tarsi tawny with fuscous mark proximally, tibial spurs and comb tawny proximally, fuscous distally. Pretarsal claw tawny with fuscous tips. Legs with white pile and white pruinosity, both more dense proximally.

Operculum.—Male operculum ochraceous, with fuscous base, reaching to half-length sternite III. Lateral margin sinuate, rounded posterolateral margin, posterior margin angled anteriorly, posteromedial margin rounded, medial margin straight until constricting at base. Medial margin extends slightly medial to meracanthus. Meracanthus ochraceous with fuscous base. Operculum and meracanthus covered with short white pile and white pruinosity, more dense laterally and on base. Female operculum ochraceous posteriorly, fuscous anteriorly, posterior margin rounded extending medially to middle of meracanthus, not reaching to posterior margin of sternite II. Meracantus ochraceous with fuscous base.

Abdomen.—Tergites ferruginous posteriorly and laterally, fuscous anteromedially with fuscous lateral spots, tergite 2 with tawny anterior margin along timbal cavity. Timbal with 16 long and 14 short ribs. Tergites covered with short white pile, longer pile posterolaterally, and white pruinosity, pruinosity more dense laterally. Sternites tawny ferruginous posteriorly, fuscous anteriorly, sternite II more fuscous, sternite III with fuscous only anteromedially, proportion of fuscous variable in paratypes, one paratype with red posterior margins. Epipleurites fuscous with tawny ferruginous posterior. Long white pile medially on sternite II, silvery pile on sternites, white pruinosity dense on sternites I and II, laterally and epipleurites. Male sternite VII with curving sides and rounded posterior margin. Male sternite VIII tawny ferruginous, fuscous at base and along posterior midine with long and short white pile and white pruinosity.

Male genitalia.—Pygofer piceous anteriorly, ferruginous posteriorly, pygofer upper lobe folded medially and covered with white pruinosity. Pygofer basal lobe short with fuscous rounded terminus. Median uncus lobe fuscous with parallel sided base, tapering to rounded terminus at about half its length, central ridge tawny. Anal styles tawny, fuscous centrally, extending beyond level of dorsal beak. Aedeagus fuscous with tawny membrane and two curved fuscous spines, endotheca recurved and tawny.

Female genitalia.—Sternite VII dark tawny with lateral ferruginous spots and anterolateral fuscous marks, posterior margin curving to rounded medial notch. Abdominal segment 9 piceous, ferruginous tawny posterodorsally and ventrolaterally with long white and short silvery pile and pruinosity on abdominal segment 9. Anal styles ferruginous tawny with fuscous tips, not reaching beyond dorsal beak. Gonocoxite IX ferruginous, gonapophysis VII castaneous, gonapophysis X castaneous with long white pile near tip and white pruinosity. Ovipositor sheath extending to base of anal styles.

Measurements (mm).— N = 5 males or 1 females, mean (range). Length of body: male 34.0 (31.5–35.4), female 30.6; length of forewing: male 41.4 (37.0–43.8), female 40.6; width of forewing: male 14.3 (12.7–15.3), female 13.3; length of head: male 5.7 (5.4–6.0), female 5.9; width of head including eyes: male 16.5 (15.3–18.2), female 15.7; width of pronotum including suprahumeral plates: male 16.0 (15.4–17.1), female 16.4; width of mesonotum: male 12.8 (12.0–13.7), female 12.4.

Notes.— Chonosia septentrionala sp. n. is from the Chaco and Monte floristic provinces (Sanborn et al. 2011a).