Examnes lumawigi subrugosus, Yokoi, 2023

Yokoi, Yaheita, 2023, Note on genitalia and taxonomy of the Callidiopini from the Philippines, with description of six new species and two subspecies (Coleoptera, Cerambycidae, Cerambycinae), Contributions to Entomology 73 (1), pp. 31-66 : 31

Examnes lumawigi subrugosus subsp. nov.

Figs 13A-F , 25A-L

Type material.

Holotype ♂ (SMF): "Phil., E. Luzon, Sierra Madre"; "Dipaculao, Aurora, I-2014"; "Cope Collection". (former CJC).

Etymology.

The name of this subspecies refers to the pronotal surface.

Diagnosis.

This subspecies differs from the nominotype in the structure and integument of pronotum.

Measurements.

Holotype ♂: TL = 10.0 mm; EL/TL = 0.67; EL/EW = 2.85; HW/PW = 0.90; PL/PW = 1.02; PA/PW = 0.76; PB/PW = 0.92.

External characteristics: comparison with the nominotype.

Body smaller. Pronotum with PL/PW = 1.02 slightly longer than wide, instead of "distinctly longer than wide"; surface obtusely rugose; several erect setae on each side (Fig. 13C, D ). 7th sternite feebly emarginated instead of sub-truncated.

Description of male genitalia

(Figs 13F , 25A-L ). Median lobe about half the length of abdomen; sub-bullet-shaped in dorsal view, in lateral view strongly curved in the middle; dorsal plate dehiscent in basal 11/20; ventral plate longer, dehiscent in basal 3/4, gradually narrowed toward apex. Tegmen almost 5/6 as long as median lobe; weakly bi-sinuate in lateral view. Parameres half the length of tegmen; apical 1/6 bi-lobed; lobes each fringed with short to medium setae; venter widely emarginated. Apical process of endophallus as Figs 13F , 25D-F ; about 1/3 as long as median lobe, sub-monolithic, sub-fusiform in dorsal view, arcuate in lateral view, with a prominent, horn-shaped dorsal projection; sides thick, elongated; the middle sub-enclosed by a membranous sack; base sub-triangular-spatulate, bent upward in profile. Blade of 8th sternite transverse, cotyledonary; apex in shallow “V” -form emarginated; extensively thinned in middle; apex and sides fringed with sporadic long hairs; apical middle clothed with additional shorter hairs; basal middle thickened near the peduncle; peduncle nearly as long as blade. 8th tergite transverse, sub-trapezoidal; corners rounded; fringed with sporadic medium to long hairs.

Distribution.

Luzon, Philippines.

Comparative notes.

The pronotal structure and surface of this subspecies differ substantially from those of the nominotype Examnes lumawigi lumawigi (Fig. 14A, B ). The other observed differences are not of fundamental nature. The holotype male of this new subspecies was collected in Luzon, same as that of E. lumawigi lumawigi , though in a geographically separated locality. Its final taxonomical position should be determined by comparison of male genitalia. In this publication, it is described as a new subspecies.

Apical process of its endophallus is essentially of similar structure as that of E. philippensis , nominotype of the genus Examnes . Differences are concerned with the structures of sides and base as well as of appendage (Figs 25D-F , 27D-F ).

Figures

Figure 13. A-F. Examnes lumawigi subrugosus subsp. nov. Holotype male. A. Habitus, dorsal view; B. Ditto, ventral; C. Head and pronotum; D. Ditto, front-lateral view; E. Prosternum and mesoventrite; F. Endophallus, with apical process.

Figure 14. A, B. Pronotum in lateral view, comparison. A. Examnes lumawigi lumawigi Huedepohl. Holotype male, from Mountain Province, Luzon. B. Examnes lumawigi subrugosus subsp. nov. Holotype male, from Sierra Madre, Luzon.

Figure 25. A-L. Examnes lumawigi subrugosus subsp. nov. Holotype male. Genitalia. A. Median lobe with endophallus, dorsal view; B. Ditto, lateral; C. Ditto, ventral; D. Endophallus, apical process, dorsal view; E. Ditto, lateral; F. Ditto, ventral; G. Tegmen, dorsal view; H. Ditto, lateral; I. Ditto, ventral; J. 8 th sternite, ventral view; K. Ditto, with 8 th tergite in the background; L. 8 th tergite, ventral view. Scale bars: 0.5 mm (D-F); 1 mm (A-C, G-L).

Figure 27. A-L. Examnes philippensis Newman. Male from Basilan, Philippines (New record). Genitalia. A. Median lobe with endophallus, dorsal view; B. Ditto, lateral; C. Ditto, ventral; D. Endophallus, apical process, dorsal view; E. Ditto, lateral; F. Ditto, ventral; G. Tegmen, dorsal view; H. Ditto, lateral; I. Ditto, ventral; J. 8 th sternite, ventral view; K. Ditto, with 8 th tergite in the background; L. 9 th sternite (spicum gastrale) and tergite, ventral view. Scale bars: 0.5 mm (D-F); 1 mm (A-C, G-L).