Goriresina fungifora, Matalin & Perkovsky & Vasilenko, 2021

Matalin, Andrey V., Perkovsky, Evgeny E. & Vasilenko, Dmitry V., 2021, First record of tiger beetles (Coleoptera, Cicindelidae) from Rovno amber, with the description of a new genus and species, Zootaxa 5016 (2), pp. 243-256 : 251-252

Goriresina fungifora , new species

Type material. Holotype female SIZK L-813, Voronki, Rovno amber, late Eocene ( Figs 1, 2 ).

Preservation status. The inclusion is in a large, flat and clear piece of amber. Legs are entirely complete, only the apex of the right mesofemur and the base of the right mesotibia being damaged. Most dorsal surface of the right elytron is not visible. Probably as a result of microbial decay during the embedding of the beetle in the resin the left side of its body is densely covered with milky coating and is thus insufficiently contrasting.

Syninclusions. Carabidae (Lebiini) , leg of Sciaroidea, legs of Tipuloidea, fragments of two Insecta incertae sedis (Diptera or Hymenoptera ), two Collembola (Entomobryomorpha and Symphypleona), and Ophiocordyceps sp. (Fungi: Ascomycota).

Description. See diagnose and description of the monotypic genus above.

TL— 10.7 mm.

Colour could be identified only presumably. Head and pronotum dark, apparently with metallic tinge; at least antennomeres 1–3, as well as visible palpomeres with metallic tinge; metepisternum, metepimeron and at least abdominal sternite 1 seem to be metallic brown-bronze; legs dark, probably with metallic tinge ( Fig. 4 ); elytra black-grey, possibly with bronze lustre.

HL = 1.9 mm; TE = 1.2 mm, LE = 1.4 mm; MP2L:MP3L:MP4L = 1.6:1.0:1.25; 3rd labial palpomere 2.1 times longer than the 4th one; 3rd antennomere with three short setae except apical ones, 5th antennomere with two visible, short, apical setae; AN2L:AN3L:AN4L:AN5L:AN6L:AN11L = 1.0:3.7:2.0:2.8:2.5:1.75.

PL = 2.4 mm, DL/PL = 0.54 (NB: the pronotum is completely visible only in the left lateral view; only a small portion of the apical lobe and disc are discernible in the right dorsolateral view, its most part remaining invisible).

Macropterous, apex of right wing ( Fig. 3 ) and a short portion of costal vein of right wing with regular transverse notches ( Fig. 13 ), all well-visible.

Elytra not fused, EL = 6.75 mm, EW (only left elytron) = 2 mm, EL/EW = 1.69, elytral sculpture formed by numerous small hexagonal pits. Series umbilicata with at least 11 setae: six (4+1+1) in humeral group and five (2+3) in middle group. Elytral pattern probably represented by an apical portion of humeral spot, a slightly sinuate, transverse medial fascia with an extended and downward directed apical portion, and oval apical spot ( Fig. 17 ).

Fore, middle and hind femora with five, three and four visible setae along bottom margin, respectively; apical portion of posterior margin of tibiae, especially on fore legs, with a dense row of setae, all tibiae each with two spurs ( Figs 3 , 15 ).

Etymology. Named after the Ophiocordyceps sp. synnema on the right eye of the holotype ( Fig. 8 ).

Differential diagnosis. The new species is easily distinguished from P. groehni and P. cassolai , both described from Baltic amber, by the shape of the labrum with six submarginal setae (latero-basal setae very long) and two apical teeth with notch between them ( Figs 5, 6 , 10 vs figs 7, 17 in Wiesner et al. 2017), by the more globular pronotum, by the apicad converging elytra as well as by the small sharp sutural spine ( Figs 11 , 17 vs figs 12, 13 in Wiesner et al. 2017). Additionally, the new species is well distinct from P. groehni by its smaller size, the less furrowed head, and the dense punctuation and sparse pubescence of the humeral area of the elytra ( Fig. 12 ). Besides this, the new species differs from P. cassolai by the larger size, longer labrum ( Fig. 5, 6 , 10 vs fig. 17 in Wiesner et al. 2017), densely setose 3 rd labial palpomere, and clearly shorter 4 th labial palpomere ( Fig. 7 vs fig. 19 in Wiesner et al. 2017).

Figures

FIGURE 17. Simplified reconstruction of the habitus of Goriresina fungifora gen. n., sp. n., holotype, dorsal view.

FIGURES 1–2. General view of the amber piece: 1— top view with the visible contours (arrow) of the left side of the beetle; 2—lateral view.

FIGURES 3–4. Goriresina fungifora gen. n., sp. n., holotype: 3—left lateral view; 4—right dorso-lateral view.

FIGURES 11–16. Goriresina fungifora gen. n., sp. n., holotype: 11—elytra; 12—punctation and pubescence of shoulders area of right elytron; 13—lateral edge of right elytron; 14—right thoracic and abdominal segments; 15—legs; 16—middle left tarsus. Abbreviations: cv—costal vein of right wing; mte—metepisternum; as1—first abdominal sternite; hc—hind coxa; fr—fore right leg; mr—middle right leg; fl—fore left leg; ml—middle left leg; hl—hind left leg; I–V—middle tarsomeres; cl—claws.

FIGURES 8–10. Goriresina fungifora gen. n., sp. n., holotype: 8—head and labrum, right dorso-lateral view (arrow points to the synnema of Ophiocordyceps sp.); 9—labrum, right dorso-lateral view; 10—reconstructed contour of the labrum, dorsal view. Abbreviations: raso—right anterior supraorbital seta; rlb—right latero-basal labial seta; rla—right latero-apical labial seta; rmn—right mandible; rmxp—right maxillary palp.

FIGURES 5–7. Goriresina fungifora gen. n., sp. n., holotype, left lateral view: 5—head and pronotum; 6—labrum; 7—mouth parts. Abbreviations: lss—left scape seta; lcs—left clypeal seta; fts—left fore-trochanter seta; llb—left latero-basal seta; lla— left latero-apical seta; la—left apical seta; ra—right apical seta; rla—right latero-apical seta; lb—labrum; lmn—left mandible; mxp—maxillary palps; lbp—labial palps; cas—cardo setae; sts—stipes setae.