Xylographella speciosa Lopes-Andrade, 2008

Lopes-Andrade, Cristiano, 2008, An essay on the tribe Xylographellini (Coleoptera: Tenebrionoidea: Ciidae), Zootaxa 1832 (1), pp. 1-110 : 11-12

Xylographella speciosa Lopes-Andrade sp. nov. ( Figs 16–18 , 20 , 21B, 22B , 25–26 )

Etymology The specific epithet is a latin adjective meaning “impressive”.

Diagnosis

Large species, total length more than 2.00mm. Interstice between punctures smooth. Elytra with apical declivity bearing longitudinal raised keels.

Description

Holotype. ( Figs 16–18 ) Measurements in mm: TL 2.58; PL 0.84; PW 1.11; EL 1.68; EW 1.21; GD 1.21. Ratios: PL/PW 0.76; EL/EW 1.39; EL/PL 2.00; GD/EW 1.00; TL/EW 2.13. Body with dorsal and ventral surfaces dark reddish brown; mouthparts, antennae and legs reddish brown. Head coarsely and shallowly punctate on dorsum; punctures sparse, with interstice conspicuously microreticulate. Each antenna ( Fig. 21B ) with ten antennomeres (FL 0.17mm; CL 0.22mm; CL/FL 1.26); length of the antennomeres (in mm) as follows: 0.118; 0.055; 0.073; 0.036; 0.018; 0.023; 0.023; 0.055; 0.055; 0.109. Eyes with greatest width 1.0X the basal width of scutellum. Pronotum with deep punctures; punctures coarse, separated by a distance of one puncture width or less, but not coalescent; interstice between punctures smooth; anterolateral angles broadly rounded; lateral margins crenulated. Scutellum impunctate, smooth; basal width 1.5X the EW. Elytra with confused punctation; punctures as coarse as the ones on pronotum, separated by a distance of one puncture width or less; interstice smooth; elytral apices truncate; apical declivity (posterior one-third of elytra) bearing twelve raised keels (six in each elytron) converging to apex. Each hindwing ( Fig. 20 ) with apical area bearing two distinct pigmented lines, one near the anterior margin and the other almost reaching the posterior margin. Prosternum biconcave, with a thin longitudinal carina at midline. Metaventrite glabrous, either side bearing large obsolescent punctures; disc smooth, dull; discrimen absent. Abdominal ventrites glabrous. Each metati- bia ( Fig. 22B ) slender, near 4.5X as long as broad, slightly expanded to the basal one third, then almost parallel-sided; outer lateral edge somewhat straight, just slightly sinuous, bearing around ten spines; outer apex angulate; apical edge bearing around five distinct spines. Male genitalia (in a paratype). ( Fig. 25 ) sclerotized and large (length more than 1.2mm); tegmen as long as median lobe, with apex expanded and globose; median lobe slender, elongate, narrower than the tegmen.

Type series

Holotype. ( FMNH) Philippines: /CAMP MERAN E [handwritten] slope Mt. Apo , Davo Prov. Mindanao, P.I. [printed] XI-46 [handwritten] / F.G. Werner Collector / Xylographella speciosa Lopes-Andrade HOLO- TYPUS [printed on red paper] /. Paratypes. Philippines: 8 specimens (4 FMNH, 4 LAPC), same data as holotype ; 1 specimen ( FMNH) labeled / E. slope Mt. McKinley , Davo Prov. , Mindanao, P.I. 6600’ IX-2-1946 [handwritten] / From Polypore [handwritten] / Heyneman Collector [handwritten]/. All paratypes labeled / Xylographella speciosa Lopes-Andrade PARATYPUS [printed on yellow paper]/.

Variation

Measurements in mm (n = 7, including the holotype): TL 2.05–2.95 (2.68 ± 0.32); PL 0.68–1.00 (0.89 ± 0.13); PW 0.84–1.21 (1.11 ± 0.13); EL 1.32–1.84 (1.72 ± 0.19); EW 0.89–1.32 (1.19 ± 0.14); GD 0.89–1.26 (1.17 ± 0.12). Ratios: PL/PW 0.71–0.86 (0.80 ± 0.05); EL/EW 1.36–1.52 (1.45 ± 0.06); EL/PL 1.79–2.20 (1.93 ± 0.14); GD/EW 0.92–1.00 (0.98 ± 0.03); TL/EW 2.13–2.35 (2.26 ± 0.07).

Distribution Known only from Mindanao and Luzon provinces, in the Philippines ( Fig. 26 ).

Host fungi Unidentified bracket fungus.

Comments

A species very distinct from Xyl. punctata . Besides the morphological differences, they are quite distinct in size: the biggest Xyl. punctata is considerably smaller than the smallest available specimen of Xyl. speciosa sp. nov. The description of this new species helps to reinforce the limits of the genus Xylographella , sustaining its current separation from Scolytocis .

Some species of Tropicis (belonging to Syncosmetina subtr. nov.) also have similar longitudinal raised keels on elytra. However, these Tropicis and Xyl. speciosa sp. nov. are easily distinguished by the diagnostic characters of the subtribes of Xylographellini .

Figures

FIGURE 26. Distribution map of Xylographella Miyatake, showing the known distribution of Xyl. punctata Miyatake (triangles) in Japan and Xyl. speciosa sp. nov. (stars) in the Philippines.

FIGURES 16–18. Xylographella speciosa sp. nov. 16. Dorsal view. 17. Lateral view. 18. Ventral view.

FIGURES 19–20. Hindwings of the two species of Xylographella Miyatake. 19. Xyl. punctata Miyatake. 20. Xyl. speciosa sp. nov.

FIGURES 21–22. Xylographella Miyatake. 21. Antennae of Xyl. punctata Miyatake (A) and Xyl. speciosa sp. nov. (B). Note that the first antennomere is not shown in the latter (asterisk). 22. Metatibiae of Xyl. punctata Miyatake (A) and Xyl. speciosa sp. nov. (B).

FIGURES 23–25. Xylographella Miyatake. 23. Tegmen (teg) and penis (pen) of Xyl. punctata. 24. Y-Shaped ninth segment (broken, see asterisks) of Xyl. punctata. 25. Male genitalia of Xyl. speciosa sp. nov. showing the Y-shaped ninthsegment (ix), tegmen (teg) and penis (pen).