Ribautocapsus tezcani Çerçi, 2024

Çerçi, Barış, Koçak, Özgür & Tezcan, Serdar, 2024, Review of the Heteroptera (Hemiptera) fauna of Turkey: perspectives for future research, European Journal of Taxonomy 937, pp. 1-127 : 49-51

Ribautocapsus tezcani Çerçi sp. nov.

urn:lsid:zoobank.org:act:770E1C2C-3640-4A0D-A597-9C1D1A5587D9

Fig. 22

Diagnosis

The new species is characterized by the combination of following features: tricolorous hemelytra with basal half orange, distal half mostly dark brown with a white band along apical margin of corium and another narrower horizontal white band between the color zones, disc of pronotum not inflated, scutellum with a distinct protuberance, clypeus separated from frons, very large right paramere and very small and simple U-shaped vesica with apical secondary gonopore.

DIfferentIal dIagnosIs

Following the identification key provided by Wagner (1974), the new species keyes out to Ribautocapsus . Only known species of this rarely collected genus, R. bruckii (Reuter, 1879) , is known from the West Mediterranean region and characterized by wide and robust body, pseudobrachypterous female, base of vertex without a keel, clypeus not separated from frons by angle, pronotum remarkably inflated, scutellum with a cone shaped protuberance and hemelytra with two white bands, the basal one starkly shrinking medially ( Wagner 1974; Streito & Matocq 2006). The new species shows several diagnostic features of this genus, e.g., wide and robust, pseudobrachypterous female, vertex without keel, cone shaped protuberance of scutellum and double white bands of hemelytra. However, it lacks rest of the diagnostic criteria: clypeus distinctly separated from frons ( Fig. 22D ), pronotum not inflated ( Fig. 22C ) and basal white band of hemelytra not shrinking ( Fig. 22A–B ). Despite these differences, both species are confirmed to be congeneric, based on essentially identical male genitalia ( Fig. 22E–G ) (A. Matocq, pers. comm.). Secondary gonopore is located preapically or far away from apex in most species of Hallodapini , hence vesica with apically located secondary gonopore is an important diagnostic feature of Ribautocapsus . Apart from abovementioned differences, the new species is distinguished from R. bruckii by several remarkable features. The most remarkable difference is the starkly contrasting orange and dark brown colored zones of hemelytra. Although hemelytra of R. bruckii show color changes from dark brown to pale brown, these are not contrasting in two separate zones, as in the new species. The pronotum has pale semilunar markings at the posterior margin in the new species, whereas the pronotum of R. bruckii is unicolorous. The apical white band reaches the tip of clavus in the new species whereas this white band does not even reach medial border of corium in R. bruckii . Finally, the general coloration of the new species is reddish brown whereas R. bruckii is dark brown colored.

Etymology

The name of the new species is dedicated to Prof. Dr. Serdar Tezcan, a renowned Turkish entomologist who has worked on elucidation of the diverse entomofauna of Turkey for decades and is currently the curator of Lodos Entomological Museum, İzmir, Turkey (LEMT). He was also a member of the expedition carried out in the Mediterranean region of Turkey between 1984 and 1987, during which this new species was collected.

Type material

Holotype TURKEY – Hatay Province • ♂; Yayladağ ; 10 Jul. 1984; EUAPP exped.; on Platanus sp. ; LEMT.

Paratypes TURKEY – Hatay Province • 1 ♂, 5 ♀♀; same data as for holotype; LEMT .

Description

Male

COLORATION. Tricolored, reddish brown, orange and white. Head unicolorous reddish brown. Antennae entirely reddish brown, base of fourth segment slightly paler. Pronotum reddish brown, base of pronotum with two semilunar, pale patches. Scutellum reddish brown, a large orange colored rectangular patch on each anterior corner. Basal half of hemelytra uniformly orange colored, distal half dark brown except for distal margin of corium which has a broad white band and a small orange spot laterally, a narrow, sharply bordered white stripe separating basal orange and distal dark brown areas, equally wide at corium and clavus, anteriorly bordered very narrowly with a dark brown band. Basal ⅔ of exocorium yellow, distal ⅓ dark brown, change of coloration diffuse, cuneus dark brown. Membrane grayish. Femora and tibiae reddish brown, joints pale, coxae whitish yellow. Abdomen dark brown, thoracic pleura light brown.

VESTITURE. Dorsum with short, erected pale setae on head, pronotum, hemelytra and also present on eyes. Antennae with double vestiture, densely covered with short adpressed pale setae, and sparsely with short erect pale setae.

STRUCTURE. Macropterous or pseudomacropterous, size 3.8–4.0 mm, oblong-ovate, 3.3× as long as width of pronotum. Head transverse, 0.62× as long as wide, 0.8× as long as high in lateral view, frons slightly globose, clypeus separated from this, ocular index 1.75, rostrum reaching posterior coxae. Antennal segments equally thick, as thick as anterior tibia, last antennal segment gradually narrowed apically, first antennal segment as long as vertex, second antennal segment 1.6× as long as diatone, 1.15× as long as width of posterior margin of pronotum, 0.8–0.9× as long as combined length of last two segments, ratios of antennal segments 10:27:18:14. Pronotum tall and close to rectangular, 0.66× as long as wide, posterior margin 2.1–2.4× as wide as anterior one, with a very narrow collar, lateral margins concave, posterior corners rounded but distinctly protruding, posterior margin shallowly concave. Scutellum with a distinct protuberance medially. Hemelytra parallel sided in basal ⅔, distinctly enlarged at distal ⅓, distal ⅓ of corium and basal ⅓ of clavus mat, rest of hemelytra shiny, surpassing tip of abdomen. Legs short and thick.

GENITALIA. Left paramere as in Fig. 22F . Right paramere large, as in Fig. 22E . Vesica small, simple, U-shaped, secondary gonopore apically located, without any sclerotized processes ( Fig. 22G ).

Female

Similar to male, differs in following morphometric characters: size 3.9–4.3 mm, ocular index 2.0 and ratios of antennal segments 10:27:21:14.

Biology

The new species was collected from Platanus sp.

Checklist of species of Heteroptera of Turkey

The checklist of the Heteroptera species of Turkey is presented at the end of the article (Appendix 1). The data used for analysis below is given in Supp. file 1. In this supplementary file, chorotypes and provincial distribution of each species are given with references. Species in red need confirmation, those in yellow are newly described and those in green are newly recorded from Turkey. A column for each ecoregion, t-SNE suggested group and province is provided that allows for filtration. For example, filtering for the value ‘TRUE’ in Karaman column gives the complete list of species recorded from Karaman. Additionally, lists of referenced articles, number of species recorded from each province and ecoregion, chorotypical composition of provinces, chorotype composition of t-SNE suggested groups and species absent from Turkey but known from its neighboring countries, are given in separate sheets.

Figures

Fig. 22. Ribautocapsus tezcani Çerçi sp. nov. A. Holotype, ♂ (LEMT). B. Paratype, ♀ (LEMT). C. Head, pronotum and scutellum from lateral view, paratype, ♀ (LEMT). D. Head from lateral view, paratype, ♀ (LEMT). E. Right paramere, paratype, ♂ (LEMT). F. Left paramere, paratype, ♂ (LEMT). G. Vesica, paratype, ♂ (LEMT). H. Pygophore from dorsal view, paratype, ♂ (LEMT). E, F and G are to scale with each other. Scale bar: A–B = 1 mm