Prothyma (Genoprothyma) discretepunctata Horn, 1924

Wiesner, Jürgen & Anichtchenko, Alexander, 2023, The Philippines species of the genus Prothyma Hope, 1838 (Coleoptera: Cicindelidae) Part 1: Subgenera Prothyma Hope, 1838, Genoprothyma Rivalier, 1964 and Parasymplecthyma subgen. nov., Zootaxa 5315 (1), pp. 1-36 : 12-14

Prothyma (Genoprothyma) discretepunctata Horn, 1924 ( Fig. 7 )

Prothyma discrete-punctata Horn 1924: 88 , 89.

Type locality. “Sibuyan”.

Prothyma discrete-punctata: Horn 1926: 99 ; Horn 1934: 145, f. 7.

Prothyma (Genoprothyma) discrete -punctata : Rivalier 1964: 154, f. 14d, 155, f. 15d, 157, f. 16d, 158.

Prothyma (Genoprothyma) discretepunctata: Wiesner 1980: 124 ; Wiesner 1992: 58; Cassola 2000: 494; Cabras, Cabigas and Wiesner 2016: 193; Wiesner 2020: 139.

Type material. Lectotype (here designated) male: “Island / Sibuyan / Baker // Syntypus [printed, red] // Type / W. Horn // LECTOTYPE / Prothyma discrete-punctata / W. Horn, 1909 / design. Wiesner & / Anichtchenko 2022 [printed, red]” ( SDEI) . Paralectotypes: 5 male and 3 females: “Island / Sibuyan / Baker // Syntypus [printed, red] // Type / W. Horn // PARALECTOTYPE / Prothyma discrete-punctata / W. Horn, 1909 / design. Wiesner & / Anichtchenko 2022 [printed, red]” ( SDEI) .

Other material examined. 1 female: “Island / Sibuyan / Baker” ( SDEI) ; 1 male, 1 female in NHMW, 4 males, 2 females in ZSM: “ Philippin. Sibuyan Is. / Romblon” ; 1 female: Romblon Island / Mimaropa reg. Romblon Pr. / Philippines / leg. Hombach ii/1979 ” (CKc); 1 female: Philippines, Sibuyan Id / Magdiwang , Tampayan / Camp New St. Gallen area / 19–31.vii.1986, 50-200 m, R. A. Müller leg. et coll.” ( MCZR) ; 4 males, 4 females: “ Philippines / Romblon 1989 / Sibuyan Isl. ” ; 1 female: “ Romblon, 1989 / Espagna / Philippines ” ( ZSM) ; 2 males, 2 females: “ Philippines, Sibuyan / Mt. Guiting - Guiting / Romblon ix.2014 ” ; 16 males, 21 females: “ Philippines, Sibuyan / Mt. Guiting - Guiting / iv.2015 / leg. Noel Mohagan ” ( JWc) .

Diagnosis. Prothyma (Genoprothyma) discretepunctata is distinguished from the other members of the subgenus by: 1, the large body size; 2, smooth and shiny surface of head, pronotum and elytra.

Description. Size: TL (without labrum) 11.4–14.4 mm (mean = 13.0 mm, n = 72).

Head: Color shining black; with faint metallic reflections, coppery-red or blue reflections near pronotum and basal part of genae; surface glabrous, with two setigerous punctures next to eye, one along frontal margin and one dorsally at center; two shallow greenish depressions near the orbital plates at the border to the frons; longitudinal striae on orbital plates, shallow on vertex; shallow transversal striae behind the eyes and on neck; striae becoming obsolete on genae, frons, and clypeus. Head as wide as elytra (mean EW/HW = 1.0). Labrum bicolored, ochre-testaceous, in variable extension blackish, in some specimens completely black. Labrum of male ( Figs 7b, c ) wider than long (mean LW/LL = 1.4); with four setae located near the margin, two lateral and two apical; with two blunt anterolateral teeth and two anteriorly-directed thorn-like anterior teeth at the anteromedian lobe. Labrum of female ( Fig. 7d ) slightly wider than long (mean LW/LL = 1.1), with four setae located near the margin, two lateral and two apical; with two blunt anterolateral teeth and two anteriorly-directed thorn-like anterior teeth at the anteromedian lobe, intermediate space with a large triangular tooth. Mandibles brownish, with four teeth, margin darkened, small area of base ochre-testaceous. Labial and maxillary palpi testaceous, the last segment shiny black, second segment of maxillary palpi variable, partly to completely black in some specimens. Antennae slender, reaching posteriorly to the middle of the elytra in males, shorter in females; scape blackish, lighter at base and apex; antennomere two black; antennomeres three and four black with metallic luster and with ochre-testaceous part at the apex in some specimens; scape with one apical seta, the following three antennomeres almost glabrous; antennomeres five to eleven black, dull, finely, and evenly pubescent.

Thorax: Pronotum slightly longer than wide (mean PW/PL = 0.9); sides not rounded between the transversal constrictions, nearly parallel sided; glabrous, with irregular, shallow transverse wrinkles on disc, smoothed in anterior third; black with coppery-red, violet, or brassy reflections dorsally; transversal constrictions with blue and green reflections; margins greenish-blue; sternae and episternae glabrous, shiny dark blue; mesepisternum of females above with a shallow furrow and lateromedial with an oval pit.

Elytra: ( Figs 7f–h ) slightly more than twice as long as wide (mean EL/EW = 2.1), parallel-sided, with a flattened basal hump and a shallow depression next to the lateromedial dot, slightly bulged at the lateral margin in basal and apical half; dorsal surface shining brownish black, with coppery reflections at the shoulders, blue-green reflections along the margin; elytral testaceous maculation consist of a medium sized humeral dot, a medium sized and oblique backwards lateromedial dot, and a medium sized rounded preapical dot; surface with dense and evenly spaced punctures, shallower towards the apex and along the margin, becoming confluent and forming shallow grooves near the suture; these grooves are distinct in the apical third of the elytra nearest the suture, shallower in the following area up to the tip of the lateromedial spot, along the margin the punctures are isolated; apical margin distinctly rounded and hardly restricted towards middle suture, with a tiny sutural spine. Epipleurae black.

Ventral aspect: Venter glabrous, black with bluish or greenish reflections; trochanter glabrous, coxa, femur, tibia, and tarsi setose; trochanter and coxa brownish yellow; femur brownish yellow, apical part black; tibia and tarsi brownish black with metallic luster.

Aedeagus: ( Fig. 7e ) in lateral view, slender in the basal third, then voluminously expanded, then rapidly tapering again towards the apex, extending to a relatively short and blunt point (total length 3.3 mm).

Distribution. ROMBLON—Sibuyan: España, Magdiwang ( Cassola 2000: 494), Mt. Guiting-Guiting.

Remarks. Aedeagus and endophallus structure in overall appearance is similar with P. hopkinsi , it suggests that they are closely related; however, externally and geographically these taxa are distinct and can be considered independent species.

Figures

FIGURE 7. Prothyma (Genoprothyma) discretepunctata Horn, 1924, specimen from Mt. Guiting-Guiting. (a) Dorsal habitus, male, compared with the lectotype. Scale = 5 mm. (b) Labrum. (c) Labrum, male. (d) Labrum, female. Scale = 1 mm. (e–g) left elytron. Scale = 5 mm. (e) Male. (f) Male. (g) Female. (h) Aedeagus, left lateral view. Scale = 1 mm.