A new, widespread genus of Baetidae from South Asia (Insecta, Ephemeroptera)

• Published in: ZooKeys Vol. 1168; no. 1; pp. 231 - 266
• Main Authors: Kaltenbach, Thomas, Kluge, Nikita J, Gattolliat, Jean-Luc
• Format: Journal Article
• Language: English
• Published: Bulgaria Pensoft Publishers 03-07-2023
• Subjects: Analysis; Baetidae; Cameras; Far East; Femur; Identification and classification; Insects; Larvae; May-flies; Morphology; Morphology (Animals); Neogene; New genera; New species; Setae; Taxonomic revision; Taxonomy; Zoology; South Asia; Indonesia; Brunei; mayflies; Sri Lanka; Taiwan; Indonesia
• ISSN: 1313-2989; 1313-2970
• DOI: 10.3897/zookeys.1168.104844

Material collected on different islands across South Asia revealed a new genus of Baetidae with a widespread distribution,
The larvae present important similarities with
, but have paraglossae dorsally with an arc of long, spine-like setae in distal area; long, slightly feathered setae between prostheca and mola of both mandibles; and very slender legs with row of short setae at dorsal margin of femur. The male imago has an extraordinarily small 3
(apical) segment of gonostylus, which is much narrower than the apex of the 2
segment. The new genus includes five species:
is described from Sumbawa (Indonesia) based on larvae,
from Sumatra (Indonesia) based on larvae,
from Borneo (Brunei) based on larvae, and
(type species) is described from Sri Lanka based on a reared male imago with its larval and subimaginal exuviae;
(Chang & Yang, 1994),
from Taiwan, formerly described in Margobaetis Kang & Yang, 1994, a subgenus of Baetis Leach, 1815, and subsequently transferred to the genus
Kazlauskas (in Novikova & Kluge), 1987, is transferred to the new genus. A key to the larvae of all species is provided. Morphological similarities and the relationship of the new genus to other genera of Baetidae are discussed.