Poseidontettix Kasalo & Skejo, 2025

Damien, Niko Kasalo, Laure, Damien Brouste, Christophe, Laure Desutter-Grandcolas, Domagoj, Christophe Hervé, Josip, Domagoj Bogić & Skejo, Josip, 2025, Atlas of New Caledonian Tetrigidae with preliminary suprageneric classification of Batrachideinae, Zoosystema 47 (18), pp. 327-397 : 376

Genus Poseidontettix Kasalo & Skejo , n. gen.

urn:lsid:zoobank.org:act:039CCE18-8C67-4E61-901C-79FAE218CC88

TYPE SPECIES. — Poseidontettix neptunus Kasalo & Skejo , n. sp.

COMPOSITION. — Monotypic.

DISTRIBUTION. — Known only from New Caledonia.

ETYMOLOGY. — Named after Poseidon, the Greek god of the sea, due to the tridentate pronotal apex. The suffix -tettix refers to the Ancient Greek word for “grasshopper”, making a noun of masculine gender.

DIAGNOSIS. — Frontal costa bifurcation a little above ventral margin of eyes. Antennae very long. Vertex low with straight base, crown-like. Anterior margin of pronotum straight. Median carina elevated in anterior part of pronotum, forming small triangular hump. Pronotal apex strongly tridentate. Lateral lobes strongly projected laterally. Third segment of hind tarsus shorter than first.

DESCRIPTION

Frontal costa bifurcation a little above ventral margin of eyes. Scutellum widening ventrad, as wide as antennal groove at widest part. Paired ocelli at level of ventral margin of eyes. Antennal grooves below ventral margin of eyes. Antennae very long filiform, composed of 13 visible segments. Vertex around 1.5 times wider than eye in frontal view. In anterior view, base of vertex at level of dorsal margin of eyes; vertex crown-like due to slightly elevated carinae. In dorsal view, vertex slightly narrowing anteriorly; only frontal costa reaching anterior margin of eyes. Medial carina visible in anterior half between eyes. Lateral carinae U-shaped, visible in anterior third between eyes. Anterior margin of pronotum straight. Prozonal carinae parallel. Median carina distinct and elevated throughout its length, forming small elevation above lateral lobes. Lateral lobes projecting outwards, rectangular, pointed backward. Ventral sinus blunt but narrow. Tegminal sinus absent. Infrascapular area wide above middle femur, narrowing slightly towards pronotal apex. Humeral angles at nearly 90-degree angle. Posthumeral spots present. Pronotal apex wide, three-spined.Tegmina and wings absent. Anterior femur with small teeth on all sides. Anterior tibia expanded throughout its length. First segment of anterior tarsus shorter than second segment, pulvilli indistinct. Dorsal margin of middle femur wavy with four low teeth; ventral margin straight with three teeth. Middle tibia expanded throughout its length; with three lappets. Hind femur robust with several sideways protrusions; small antegenicular and genicular tooth. Hind tibia straight and smooth with small teeth in distal two thirds. First tarsal segment longer than third. Pulvilli equally long, sharp, barely distinct.