Indocloeon (Hindocloeon) Kluge & Suttinun 2020
Creators: name: Kluge, Nikita J.
name: Suttinun, Chanaporn
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Ephemeroptera
Baetidae
Indocloeon

description: Indocloeon (Hindocloeon) sp. « Java »
(Figs 104, 111, 115–118)
Material examined (ZIN). INDONESIA, Java, 15 km NW Parigaran, S7°38’18”, E108°31’48”, h= 99 m. 29.I.2018, coll. S. Melnitsky & V. Ivanov: 2 S ♂, 2 S ♀.
Descriptions. Subimaginal cuticular colouration. Most part of cuticle colourless, lateral sclerite of parascutellum and posterior part of postsubalar sclerite brown.
Male subimago (Figs 117–118). Turbinate eyes red. Antenna: distal part of scapus with hypodermal pigmented spots on lateral and median sides; distal part of pedicellus with hypodermal pigmented spots on lateral and median sides (as in Fig. 92) [see Hindocloeon (9)]. First abdominal segment with pair of brown hypodermal spots just ventrad of metathoracic postnotum (Fig. 117) [see Hindocloeon (10)]. Other abdominal terga either without pigmentation, or terga VII–IX with brown hypodermal dot at middle (Fig. 118).
Female subimago (Figs 115–116). Antennae as in male. Pronotum with three pairs of small, contrasting, brown hypodermal markings on lateral parts: zigzag anterior, elongate postero-median and triangular postero-lateral ones. Mesothorax with small, brown hypodermal spots on pleura. Abdomen with dark, lateral tracheal trunks; segment I with pair of brown hypodermal lateral spots just ventrad of metathoracic postnotum; each segment II–VII with fol- lowing contrasting brown hypodermal maculae: lateral side of tergum with longitudinal triangular macula (widest anteriorly) and darker brown dot near antero-median angle of this macula; lateral side of sternum with longitudinal macula of peculiar shape (Fig. 115).
Egg (Fig. 111). Oval, about 0.15 mm length. Chorion with very fine rugosity.
Dimension. Fore wing length (and approximate body length) 3.5 mm.
Comments. Male subimagines are determined as belonging to Indocloeon s. l. based on the peculiar structure of gonostyli (Fig. 104). Female subimagines are determined as belonging to the same species based on equally colourless cuticle and the same structure of middle and hind legs as in males. Belonging of the female subimagines to the genus Indocloeon s. l. is proven by the absence of the patella-tibial suture on fore legs. This species differs from I. (H.) longistylus by having a relatively longer proximal segment of the gonostylus even in the subimaginal stage (Fig. 104). Male and female subimagines differ from the subgenus Indocloeon by the absence of reddish stripes on posterior margins of abdominal terga. The male differs from I. (H.) indonesiae, I. (H.) continentale and I. (H.) sp. « Vietnam » by the shape of the gonostylus. The female subimago differs from I. (H.) indonesiae, I. (H.) continentale and I. (H.) sp. « Vietnam » by the peculiar shape of brown maculae on abdominal terga and on the pronotum (Figs 115–116).
description: Published as part of Kluge, Nikita J. & Suttinun, Chanaporn, 2020, Review of the Oriental genus Indocloeon Müller-Liebenau 1982 (Ephemeroptera: Baetidae) with descriptions of two new species, pp. 451-484 in Zootaxa 4779 (4) on pages 479-481, DOI: 10.11646/zootaxa.4779.4.1, http://zenodo.org/record/3839329