Pseudohomonyx apoensis Miyake & Yamaya, 1997

Yang, Qiao-Zhi, Geshev, Georgi & Pathomwattananurak, Wuttipon, 2023, A new species of the genus Pseudohomonyx Arrow, 1908 (Coleoptera: Scarabaeidae: Dynastinae) from Malaysia and Thailand, with first description of P. apoensis Miyake & Yamaya, 1997 male and a catalogue of the genus, Zootaxa 5361 (1), pp. 114-124 : 118-119

Pseudohomonyx apoensis Miyake & Yamaya, 1997

(Figs. 6A–6C)

Pseudohomonyx apoensis Miyake & Yamaya, 1997: 15 , figs. 17 (head and apical part of pronotum), 20h (habitus).

Type material examined. None.

Additional material examined (1♁). The Philippines: 1♁ ( CQZY), Agco Hot Spring, Mt. Apo , Kidapawan City , Cotabato Prov., Mindanao Island , III.2017, Noel Mohagan leg.

Description (male). General ( Figs. 3A–3B ): Body black, with slight reddish color, surface mildly shiny; ventral surface covered with dense, long reddish-brown setae. Head ( Fig. 3C ): Surface mostly black, slight reddish near apex, mandible reddish. Clypeus with dense small punctures throughout, sometimes rugopunctate; clypeal apex almost flat, with a very mild, uplifted, triangular protuberance at middle; lateral and apical margins of clypeus bordered. Frons more sparsely punctate than clypeus, punctures mostly larger, slightly rugopunctate near center. Transverse carina separating frons and clypeus indicated by an obtuse tubercle and a distinct, deep, longitudinal depression behind the tubercle at each side. Mandible simply rounded at outer margin. Pronotum ( Fig. 2C ): Surface black; sparsely micropunctate throughout, only with a few slightly larger punctures sparsely distributed near lateral margin. Anterior region with a small, deep, round frontal impression, reaching one-fifth the length of pronotum, and a faint line posterior to impression reaching mid-length. Side roundly curved, widest near posterior one-third; all margins emarginate except widely interrupted in lateral margin; anterior margin with a distinct, large frontal tubercle at middle. Anterior and posterior angle rounded. Scutellum: Surface black; impunctate. Elytra: Surface mostly black, except by dark reddish suture; with sparse micropunctures and dense, round, small punctures in striae. Sutural striae narrow, deeply sulcate; other striae wider, equally wide. Intervals micropunctate, with sparse, larger punctures in sixth intervals posteriorly. Apex moderately punctured. Humeral and apical calli obtuse. Epipleuron of elytron strongly dilated horizontally from base to posterior one-fifth, widest behind middle. Metasternum: Surface with dense setae; punctures large and dense close to sides; median region impunctate, with a longitudinal depression. Abdomen: Pygidium with black surface, slightly convex, with dense punctures throughout except impunctate near apex, punctures denser at sides; punctures mainly small. Abdominal ventrites with black surface, with reddish anterior margin; with sparse micropunctures, larger punctures near base and a row of punctures with long setae at sides. Legs: All legs slightly reddish. Protibia tridentate, protarsi strongly thickened, inner protibial claw moderately enlarged and elongated. Parameres ( Figs. 3D–3E ): In caudal view ( Fig. 3D ), slender and nearly symmetric; apex with many setae-bearing punctures, setae very short; outer sides with a pair of short, acute, outward and backward processes at posterior one-seventh; inner sides sinuate; apex almost flat; in lateral view ( Fig. 3E ), apex bent downward.

Measurements. Body length: 18.8 mm; body width: 10.7 mm.

Remarks. The identification of this specimen is based on its characters highly matching the holotype (female) description and the locality. It is most closely related to P. negros Miyake & Yamaya, 1997 due to the strong similarity between characters on the parameres (apex of parameres with setae) and their appearances (frontal impression small and round, frontal tubercle distinct, elytral intervals not densely punctate before middle or impunctate, which are often densely punctate in other species whose parameres bears setae at apex). The setae on the parameres of this species is much shorter than all other Philippine species.

Figures

FIGURE 2. Habitus of paratypes of Pseudohomonyx continentalis Yang & Pathomwattananurak, new species.A, male paratype (dorsal view, ©THNHM/Tatsanai Jeenthong); B–C, female paratype (dorsal and ventral views, ©Thitipong Hongsuwong).

FIGURE 3. Male of Pseudohomonyx apoensis Miyake & Yamaya, 1997.A, habitus (dorsal view); B, habitus (ventral view); C, head and pronotum; D, parameres (caudal view); E, aedeagus (lateral view).