Introduction of the Exocelina casuarina-group, with a key to its representatives and descriptions of 19 new species from New Guinea (Coleoptera, Dytiscidae, Copelatinae)

By

Shaverdo, Helena
Sagata, Katayo
Balke, Michael

Type

Article

Date of Publication

2018

Original Publication

ZooKeys

Volume

803

Pages

Jul-70

Subjects

Copelatinae , Dytiscidae , Exocelina casuarina-group , key , New Guinea , new species

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers

Identifiers

DOI: https://doi.org/10.3897/zookeys.803.28903

 

Abstract

Nineteen new species of Exocelina Broun, 1886 from New Guinea are described herein: E.adelbertensissp. n., E.ambuasp. n., E.bewanisp. n., E.cyclopssp. n., E.ibalimisp. n., E.kekisp. n., E.kumulensissp. n., E.mendiensissp. n., E.menyamyasp. n., E.okapasp. n., E.piusisp. n., E.pseudofumesp. n., E.pseudopusillasp. n., E.pusillasp. n., E.simasp. n., E.simbaiensissp. n., E.simbaijimisp. n., E.sumokedisp. n., and E.yoginofisp. n. All of them, together with five already described species, have been united into the newly defined casuarina-group, a polyphyletic complex of related species with similar shape of the median lobe and paramere setation. An identification key to all known species of the group is provided, and important diagnostic characters (habitus, color, male protarsomeres 4–5, median lobes, and parameres) are illustrated. Data on the distribution of the species are given, showing that most of the species occur in the central, mountain part of Papua New Guinea.