Oceatra, Gnezdilov & Malenovský, 2023

Gnezdilov, Vladimir M. & Malenovský, Igor, 2023, First record of the planthopper tribe Adenissini (Hemiptera: Caliscelidae) from Socotra Island, with description of a new genus and two new species, European Journal of Taxonomy 888 (1), pp. 46-63 : 48-49

Genus Oceatra gen. nov.

urn:lsid:zoobank.org:act:C9107B76-69A3-4304-AA05-43D5542E6ADF

Type species

Oceatra litoralis gen. et sp. nov., designated here.

Diagnosis

Metope with median and sublateral carinae; median carina running to clypeus, but far not reaching upper margin of metope. Forewings with hypocostal plate and reticulate venation (with many transverse veins). Cubitus posterior (CuP) of forewings indistinct. Phallobase with ventral lobe narrow, without denticles, and dorso-lateral lobes each with mushroom-shaped outgrowth above ventral lobe. Style with large, curved capitulum, without neck, bearing small lateral tooth or lacking it. Gonoplacs short, rounded, with dorso-caudal angle not protruding beyond the apex of anal tube (in lateral view).

Etymology

The name of the genus is a combination from the Latin noun ‘ oceanus ’ (= ‘ocean’, ‘sea’, ‘large body of water’) and Socotra, referring to the geographical isolation of the newly described planthopper taxa on Socotra Island in the Indian Ocean. Gender feminine.

Key to species of Oceatra

1. Body coloration mostly light ochreous, dark pattern on forewings restricted to clavus outer margin and cells in apical half of corium ( Figs 1A–B , 2A ). Metope and coryphe relatively narrow: metope about as long at midline as wide below eyes ( Figs 1C , 2B , 5B ), coryphe nearly twice wider than long medially ( Figs 1A , 2A , 5A ). Male anal tube, in dorsal view, slightly widening apically ( Fig. 6C ). Style with hind margin straight ( Fig. 6A, D ). Phallobase apex, in dorsal view, with strongly convex margin ( Fig. 6H–I ). Each apical process of aedeagus with one long spiny and several small teeth apically ( Fig. 6F , aep) ............................................................................... O. litoralis gen. et sp. nov.

– Body coloration mostly dark brown, forewings dark brown, each with three light patches: basally, medially and subapically ( Fig. 3A–B ). Metope and coryphe relatively broad: metope 0.8 times as long as wide at midline below the eyes ( Figs 3C , 5E ), coryphe 2.5 times as wide as long medially ( Figs 3A , 5D ). Male anal tube, in dorsal view, parallel-sided ( Fig. 8B ). Style with hind margin convex ( Fig. 8A, E ). Phallobase apex, in dorsal view, with notched margin ( Fig. 8D ). Each apical process of aedeagus with two long spiny teeth ( Fig. 8A , aep) ............... O. scandens gen. et sp. nov.

Figures

Fig. 1. Oceatra litoralis gen. et sp. nov., holotype, ♂ (MMBC). A. Dorsal view. B. Lateral view. C. Frontal view. D. Genital block, caudal view.

Fig. 2. Oceatra litoralis gen. et sp. nov., paratype, ♀ (MMBC). A. Dorsal view. B. Frontal view. C. Terminalia, ventral view. D. Terminalia, lateral view.

Fig. 5. A–C. Oceatra litoralis gen. et sp. nov., holotype, ♂ (MMBC). D–E. Oceatra scandens gen. et sp. nov., holotype, ♂ (MMBC). A, D. Head and pronotum, dorsal view. B, E. Head, frontal view. C. Rostrum, lateral view. Not to scale.

Fig. 6. Oceatra litoralis gen. et sp. nov., holotype, ♂ (MMBC), terminalia. A. Genital block, lateral view. B. Pygofer, lateral view. C. Anal tube, dorsal view. D. Style, lateral view. E. Style, dorsal view. F. Penis, connective, and anal tube, lateral view. G. Penis, ventral view. H. Penis and connective, dorsal view. I. Apex of penis, dorsal view. Abbreviations: aep = apical aedeagal process; mot = mushroomshaped outgrowth of phallobase; vh = ventral aedeagal hooks; vl = ventral phallobase lobe. Not to scale.

Fig. 3. Oceatra scandens gen. et sp. nov., holotype, ♂ (MMBC). A. Dorsal view. B. Lateral view. C. Frontal view.

Fig. 8. Oceatra scandens gen. et sp. nov., holotype, ♂ (MMBC), terminalia. A. Genital block, lateral view. B. Anal tube, dorsal view. C. Penis, ventral view. D. Apex of penis, dorsal view. E. Style, lateral view. F. Style, dorsal view. Abbreviations: aep = apical aedeagal process; lt = lateral tooth; mot = mushroom-shaped outgrowth of phallobase; vh = ventral aedeagal hooks; vl = ventral phallobase lobe. Not to scale.