Philaccolilus weylandensis Balke, Larson, Hendrich & Konyorah, 2000

Balke, Michael, Panjaitan, Rawati, Surbakti, Suriani, Shaverdo, Helena, Hendrich, Lars, Van Dam, Matthew H. & Lam, Athena, 2022, NextRAD phylogenomics, sanger sequencing and morphological data to establish three new species of New Guinea stream beetles, Alpine Entomology 6, pp. 51-64 : 51

Philaccolilus weylandensis Balke, Larson, Hendrich & Konyorah, 2000 stat. nov.

Figs 2F, G , 3C, D , 4 , 5B , 7G-J , 8C, D

Philaccolilus ameliae weylandensis Balke, Larson, Hendrich & Konyorah, 2000: 35.

Type locality.

Weyland Mts., southern Nabire, Papua.

New material studied.

(KSP, MZB, ZSM) 49 exs, S Ok Sibil, tributary of Digul Riv, 292 m, 7./ 9.vi.2015, -5.0917, 140.7087, Sumoked (Pap046); 7 exs, Papua, N Waaf vill, pondok, 150m, 4.-7.vi.2016, -2.4061, 138.7439, Sumoked (Pap061).

Description.

Same as for the species complex. Larger sized member of the genus. The lateral spot of subbasal band is broadly in contact with lateral margin in all specimens from the Weyland Mts. and in some from the Digul River. Habitus and color pattern are as in Fig. 2F, G . The outer spot of the subbasal band of Weyland Mts. specimens does reach the elytral margin, or, in few specimens, vaguely so (as in Fig. 3C, D ) (Table 1 ). In the Digul River specimens (Fig. 3D ), in most specimens the subbasal band only vaguely reaches the elytral margin (the outer dot is rarely isolated and rarely fully in touch with margin (Table 1 )). As such, generally speaking, Philaccolilus weylandensis is characterized by a trend to possess this out spot being more or less in contact with the elytal margin.

The medio-discal spot is typically shorter and somewhat broader, or even only a dot (Figs 2F, G ) and never fused with postmedial band.

Size. Paratypes from the Weyland Mts. TL (N=6) 5.5-5.7 mm (av. 5.6 mm), TW 3.0-3.1 mm; specimens from Ok Sibil (N=12) 5.3-5.6 mm (av. 5.4 mm), TW 3.0-3.1 mm.

Genitalia. Median lobe of aedeagus as in Fig. 7I, J .

Distribution.

Weyland Mts., localities north of the central watershed; as well as Digul River south of Ok Sibil, which is south of the central watershed (Fig. 4 ).

Habitat.

Collected from different stream types, but usually more sun exposed.

Figures

Figure 2. A-G. Dorsal habitus of Philaccolilus species in the P. ameliae complex, as well as P. kirana and P. intania, appendages mostly removed; brightness of some paler spots digitally slightly enhanced for clarity, without altering the basic color tone; H. schematic drawings of color pattern variation in P. ameliae species complex, with explanation of elytral pattern positions (modified from Balke et al. 2000).

Figure 3. Lateral habitus of Philaccolilus species; brightness of some paler spots digitally slightly enhanced for clarity, without altering the basic color tone. A. P. kirana; B. P. intania; C. P. weylandensis (Weyland Mts., basal lateral spot clearly reaching elytral margin); D. P. weylandensis (Digul River, basal lateral spot vaguely reaching elytral margin); E. P. ameliae (Waaf, basal lateral spot clearly isolated from elytral margin).

Figure 4. Distribution of Philaccolilus species in New Guinea. Dots - P. ameliae complex, stars - P. kirana and P. intania here described from the Bird's Head Peninsula.

Figure 5. Results of the genomic nextRAD as well as mitochondrial DNA CO 1 data sequencing of Philaccolilus species in New Guinea. A. P. febrina in the Bird's Head Pensinsula; B. P. ameliae and P. weylandensis in New Guinea main body; C. P. kirana and P. intania from the Bird's Head Peninsula (localities see A). Results of the structuring analysis of nextRAD data depicted as barplots, the CO 1 data as haplotype network, subs. = substitutions.

Figure 7. Median lobe of aedeagus of Philaccolilus species (left, lateral, right, ventral view) A, B. P. ameliae (from Brazza River); C, D. P. ameliae (paratype from Wau); E, F. P. febrina (from Tamrau Mts.); G, H. P. weylandensis (from Weyland Mts.); I, J. P. weylandensis (from Digul River).

Figure 8. Last male and female ventrite of Philaccolilus A, B. As in P. kirana and P. intania; C, D. As in P. ameliae, P. febrina and P. weylandensis. Not to scale. In C. with last and penultimate ventrites to illustrate the tuft of long golden setae on penultimate ventrite; E. P. febrina male in ventral view, not to scale.