Oxythyrea subcalva Marseul, 1878

Vondráček, Dominik, Hadjiconstantis, Michael & Šípek, Petr, 2018, Immature stages of the genus Oxythyrea (Coleoptera: Scarabaeidae: Cetoniinae) with a key to third instar larvae, and notes on the biology of the genus, Zootaxa 4486 (4), pp. 401-434 : 421

Oxythyrea subcalva Marseul, 1878

( Figs. 3H ; 4H, Q ; 5H, Q ; 6H, P ; 8B, H ; 9E, K ; 10H, Q ; 11H ; 12H, O )

Material studied. 6 L3 reared ex adults collected at: Tunisia, S of Kebili, Blidette vill., N°33.583, E°8.833, 25.– 27.iii.2006, J. Batelka, J. Straka lgt.; 5 L3 reared ex adults collected at: Tunisia, Gabes, 3.5 km S of Bou Said by road, ca 35 m, N°34.183, E°9.983, 24.iii.2014, O. Hillert, D. Král, P. Šípek, D. Vondráček lgt.

Body length 16.5–20 mm. Cranium: width 2.3–2.45 mm, height 1.38–1.52 mm. Cranium yellowish to yellowish-brown, smooth; semi-circular in shape, dorsally flattened (length of dorsal straight portion of cranial margin slightly around one third of maximum width of cranium). Chaetotaxy as in Table 1. Epipharynx: Zygum with 12–17 stout conical setae and 5–9 similarly shaped setae at its proximal base. Chaetoparia with 53–60 and 31– 38 setae on right and left side, respectively. Acanthoparia with 4–6 ovate setae, 1 or 2 distal setae elongated. Stridulatory area of mandibles with 13–15 transverse ridges, ridges in distal ¾ of stridulatory area broader than in proximal third. Transverse proximal row of setae and sensilla on ligula composed of approximately 10–13 campaniform sensilla and stout lanceolate setae. Thoracic legs with stout (spine-like) or long hair-like setae, the hair-like setae are always well developed, never slender. Respiratory plate of spiracle with 10–18 holes across diameter. Raster monostichous, composed of single horseshoe-shaped row of 30–40 pali, septula broadly ovate, opened posteriorly, almost as wide as long; individuals from Blidette (Kebili env.) exhibit slightly elongated raster with septula approx. twice as long as broad. Tegillar setae about size of pali to three times as long as pali, longer setae present as well (in some specimens almost half of tegillar setae are long, in other long setae may be absent completely). Tegilla fused, more or less sparsely setose (average distance between two setae about one to two times of length of palus), campus absent. Dorsal parts of last abdominal segment sparsely setose, covered with hammate setae, subequal in length to pali or slightly longer (in individuals from Blidette; Kebili env. apical hook of hammate setae less curved, almost straight in some setae).

Figures

FIGURE 3a–i. Habitus of third instar Oxythyrea larvae. a, O. abigail; b, O. albopicta; c, O. cinctella; d, O. dulcis; e, O. funesta; f, O. noemi; g, O. pantherina; h, O. subcalva; i, O. tripolitana.

FIGURE 4a–r. Cranium of third instar Oxythyrea larvae (a–i) and antenna of third instar Oxythyrea larvae, dorsal aspect (j–r). a, O. abigail; b, O. albopicta; c, O. cinctella; d, O. dulcis; e, O. funesta; f, O. noemi; g, O. pantherina; h, O. subcalva; i, O. tripolitana; j, O. abigail; k, O. albopicta; l, O. cinctella; m, O. dulcis; n, O. funesta; o, O. noemi; p, O. pantherina; q, O. subcalva; r, O. tripolitana. Scale bars = 1 mm (a–i); 0.5 mm (j–r).

FIGURE 5a–r. Epipharynx of third instar Oxythyrea larvae (a–i) and antenna of third instar Oxythyrea larvae, ventral aspect (j–r). a, O. abigail; b, O. albopicta; c, O. cinctella; d, O. dulcis; e, O. funesta; f, O. noemi; g, O. pantherina; h, O. subcalva; i, O. tripolitana; j, O. abigail; k, O. albopicta; l, O. cinctella; m, O. dulcis; n, O. funesta; o, O. noemi; p, O. pantherina; q, O. subcalva; r, O. tripolitana. Scale bars = 0.5 mm.

FIGURE 6a–q. Maxillo-labial complex of third instar Oxythyrea larvae, dorsal view (a–i) and maxillary stridulatory teeth of third instar Oxythyrea larvae (j–q). a, O. abigail; b, O. albopicta; c, O. cinctella; d, O. dulcis; e, O. funesta; f, O. noemi; g, O. pantherina; h, O. subcalva; i, O. tripolitana; j, O. abigail; k, O. albopicta; l, O. cinctella; m, O. dulcis; n, O. funesta; o, O. noemi; p, O. subcalva; q, O. tripolitana. Scale bars = 0.5 mm (a–i).

FIGURE 8a–l. Left mandible of third instar Oxythyrea larvae, dorsal, medial and ventral view (a–c), right mandible of third instar Oxythyrea larvae: ventral, medial and dorsal view (d–f), maxillo-labial complex of third instar Oxythyrea larvae, ventral view (g–i) and metathoracic leg (j–l). a, O. pantherina; b, O. subcalva; c, O. tripolitana; d, O. abigail; e, O. albopicta; f, O. cinctella; g, O. pantherina; h, O. subcalva; i, O. tripolitana; j, O. abigail; k, O. albopicta; l, O. cinctella. Scale bars = 0.5 mm.

FIGURE 9a–l. Right mandible of third instar Oxythyrea larvae, ventral, medial and dorsal view (a–f) and metathoracic leg of third instar Oxythyrea larvae (g–l). a, O. dulcis; b, O. funesta; c, O. noemi; d, O. pantherina; e, O. subcalva; f, O. tripolitana; g, O. dulcis; h, O. funesta; i, O. noemi; j, O. pantherina; k, O. subcalva; l, O. tripolitana. Scale bars = 0.5 mm.

FIGURE 10a–r. Last abdominal segment of third instar Oxythyrea larvae, ventral view (a–i) and last abdominal segment of third instar Oxythyrea larvae, detail of raster (j–r). a, O. abigail; b, O. albopicta; c, O. cinctella; d, O. dulcis; e, O. funesta; f, O. noemi; g, O. pantherina; h, O. subcalva; i, O. tripolitana; j, O. abigail; k, O. albopicta; l, O. cinctella; m, O. dulcis; n, O. funesta; o, O. noemi; p, O. pantherina; q, O. subcalva; r, O. tripolitana. Scale bars = 1 mm (a–i).

FIGURE 11a–m. Last abdominal segment of third instar Oxythyrea larvae, lateral view (a–i) and last abdominal segment of third instar Oxythyrea larvae, posterior view (j–m). a, O. abigail; b, O. albopicta; c, O. cinctella; d, O. dulcis; e, O. funesta; f, O. noemi; g, O. pantherina; h, O. subcalva; i, O. tripolitana; j, O. albopicta; k, O. cinctella; l, O. dulcis; m, O. funesta. Scale bars = 0.5 mm.

FIGURE 12a–o. Thoracic spiracles of third instar Oxythyrea larvae, entire view (a–i) and detail of sieve plate (j–o). a, O. abigail; b, O. albopicta; c, O. cinctella; d, O. dulcis; e, O. funesta; f, O. noemi; g, O. pantherina; h, O. subcalva; i, O. tripolitana; j, O. abigail; k, O. albopicta; l, O. cinctella; m, O. dulcis; n, O. funesta; o, O. subcalva. Scale bars = 0.1 mm (a–i).