Phylacastus striolatus Fairmaire

Lumen, Ryan & Kaminski, Marcin Jan, 2023, Taxonomic revision of the genus Phylacastus Fairmaire (Tenebrionidae, Eurynotina): shortfalls of anatomical nomenclature with notes on aedeagal homology, ZooKeys 1138, pp. 1-27 : 1

Phylacastus striolatus Fairmaire

Figs 1E , 2E, F , 3G , 4A, H , 6A

Phylacastus striolatus Fairmaire, 1897: 117. Koch 1954a: 287; 1954b: 2; Kamiński 2016: 245.

Material examined

(data represents single specimens unless otherwise noted). Lectotype (MNHN) here designated: "Makapan (TR.) E. Simon 1893; Phylacastus striolatus ? Cafrar?". With an additional label on red paper: " Lectotype: Phylacastus striolatus Fairmaire" Paralectotype (MNHN): single specimen with same data as lectotype.

Additional material examined

(MIIZPAN). " Transvaal Soutpansberg Mphome Magd Knothe S" (two specimens) .

Redescription.

Length 8 mm. Head: punctures separated by <1 diameter. Mentum midportion broad, concealing lateral wings, midportion without distinct median carina. Prothorax: pronotum punctate, punctures closely spaced, separated by ≤ 1 diameter. Hypomeron lightly wrinkled. Prosternal process produced between forecoxae. Pterothorax: elytra width slightly greater than pronotal width. Elytral striae and intervals punctate; striae impressed. Interval punctures closely spaced (~1 diameter), smaller than strial punctures. Elytral tubercles absent; apical declivity with at most weak bumps or callosities. Abdomen: ventrite V sulcus widely separated from apical border. Terminalia: male: parameres converging apically, fused basally with small opening at apex exposing median lobe. Female: ovipositor slightly elongate (ratio of ovipositor coxites I-IV to paraprocts <1:1). Bursa copulatrix bilobate, accessory gland present near-to spermatheca, accessory pouch present.

Distribution.

South Africa.

Note.

While Fairmaire did not specify the number of specimens he examined in his original description, he did make mention of the collector (E. Simon) and locality, making specimens of his syntype series identifiable. Two specimens from MNHN are here designated as the lectotypes to fix the taxonomic status of the species.

Figures

Figure 1. Dorsal habitus of Phylacastus species A Phylacastus ancoralium sp. nov. holotype B Phylacastus makskacymirowi sp. nov. C Phylacastus crypticoides D Phylacastus rhodesianus E Phylacastus striolatus lectotype. Scale bars: 1 mm.

Figure 2. Phylacastus lateral aspect photographs and close-up of apical elytral tubercles and striae A Phylacastus ancoralium lateral angle B P. ancoralium close-up of elytra apical declivity C P. rhodesianus lateral angle D P. rhodesianus close-up of elytra apical declivity E P. striolatus lateral angle F P. striolatus close-up of elytra apical declivity.

Figure 3. Diagnostic features of Phylacastus species A-C mentum (Median keel red, middle portion and lateral wings blue and green respectively) D-E prosternal process F-G abdominal ventrite V A, D, F Phylacastus crypticoides B P. makskacymirowi C P. rhodesianus E P. ancoralium G P. striolatus. Scale bars: 0.1 mm

Figure 4. Phylacastus species spp. aedeagi A-D aedeagus dorsal view E, F aedeagus Ventral view A, H Phylacastus striolatus B, G P. ancoralium (ancorae highlighted blue) C P. rhodesianus E P. crypticoides D, F P. makskacymirowi (subapical sutures highlighted blue). Median lobes highlighted green. Scale bars: 0.2 mm.

Figure 6. Phylacastus internal female structures A Phylacastus striolatus B P. crypticoides C P. ancoralium. Abbreviations: Ag - Accessory gland, Ap - Accessory pouch, Bc - Bursa copulatrix, Ov - Oviduct, Sp - Spermatheca.