Myladina unguiculina Reitter, 1889

Long, Jia, Guo-Dong, Ren & You-Zhi, Yu, 2013, Descriptions of eleven Opatrini pupae (Coleoptera, Tenebrionidae) from China, ZooKeys 291, pp. 83-105 : 93-94

Myladina unguiculina Reitter, 1889 Fig. 4: 10-18

Redescription.

Male. Body covered with setae on surface, of which slightly densely on elytral sheath and abdominal segments; the total number of setose tubercles and setae on pronotal borders, hypomeron, vertex, mandibles and the last segment of maxillary palpus about 14-20 and 40-60, respectively.

Head bent at right angle to pronotum. Labrum sparsely covered with setae along anterior and lateral borders, anterior border distinctly emarginated in middle. Oculus reniform.

Pronotum: subquadrate, widest near middle, with the anterior part distinctly narrowed and the posterior part slightly narrowed; anterior border broadly emarginated and the emargination slightly protuberant in middle, lateral borders nearly straight, posterior border straight ( Fig. 4 : 13); anterior angles acutely rounded, posterior angles acute; disc flat, glabrous, with short and narrow furrows.

Mesonotum slightly convex in middle of posterior part, posterior border protuberant. Posterior border of metanotum straight.

Elytral sheath striped and densely setose. Metathoracic wing sheath completely shrouded by elytral sheath ( Fig. 4 : 10-12).

Abdominal segments I-IX curved ventrally. The width of abdominal segments I-VII gradually narrowed posteriorly. Posterior border of abdominal sternite VIII emarginated in middle, each side of the emargination with a long seta. Abdominal segment IX, urogomphi and gonotheca densely covered with setae. Urogomphi broad at base, parallel to each other, with apices slightly separated, BUL much shorter than UL ( Fig. 4 : 15-16). Abdominal tergites I-VII each with a concaveness between its lateral process and lateral border in middle, lateral processes each with 2 large and several minute setose tubercles along outer border, large setose tubercles II distinctly larger than I, no minute setose tubercle presents in front of large setose tubercles I, 2-3 minute setose tubercles between large setose tubercles I and II and behind II, respectively ( Fig. 4 : 17-18). Outer borders of lateral processes of abdominal tergites I-VI slightly protuberant in middle. Spiracles of abdominal tergites I-VI oval.

Gonotheca without apophysis.

Female. Similar to the male, but posterior border of abdominal sternite VIII broadly protuberant; gonotheca with an obtusely rounded apophysis on the anterior part and a conical apophysis on the posterior part.

Measurements. BL: 7.5-7.7 mm; PL: 2.6-2.7 mm; PW: 3.3-3.5 mm; MSL: 0.8 mm; MTL: 0.5 mm; UL: 0.8-0.9 mm; BUL: 0.1 mm.

Material examined. 10, Adults collected information: 24 June 2001, Gaoshawo Town, Yanchi County, Ningxia, China; pupation date: 2-10 September 2001.

Remarks. This species was included in the key of tenebrionid pupae by Yu et al. (1999), but only mentioned with some characters for identification. Here its morphological characters are described in detail and provided with the photos for the first time.

Figures

Figure 4. 1 - 9 Penthicus (Myladion) nojonicus (Kaszab, 1968) 1 Pupal habitus in dorsal view 2 Pupal habitus in lateral view 3 Pupal habitus in ventral view 4 Pronotum 5 Head 6 Urogomphi in dorsal view 7 Urogomphi in ventral view 8 Lateral process of abdominal tergite V 9 Lateral process of abdominal tergite VII 10 - 18 Myladina unguiculina Reitter, 1889 10 Pupal habitus in dorsal view 11 Pupal habitus in lateral view 12 Pupal habitus in ventral view 13 Pronotum 14 Head 15 Urogomphi in dorsal view 16 Urogomphi in ventral view 17 Lateral process of abdominal tergite V 18 Lateral process of abdominal tergite VII.