Macrostemum seba Malicky & Prommi, 2009

Uy, Christine Jewel C., Malicky, Hans & Bae, Yeon Jae, 2018, Review of the filter-feeding caddisfly subfamily Macronematinae (Trichoptera: Hydropsychidae) in tropical Southeast Asia, Raffles Bulletin of Zoology 66, pp. 664-703 : 685

publication ID

https://doi.org/10.5281/zenodo.5360916

publication LSID

lsid:zoobank.org:pub:5AC21789-E1C1-4B48-813D-667D7638893C

DOI

https://doi.org/10.5281/zenodo.5457025

persistent identifier

https://treatment.plazi.org/id/862D87A3-FFA0-FF8B-FF40-A820FA8D7F4B

treatment provided by

Valdenar

scientific name

Macrostemum seba Malicky & Prommi, 2009
status

 

Macrostemum seba Malicky & Prommi, 2009

( Figs. 154–159 View Figs )

Macrostemum seba Malicky & Prommi (in Malicky, 2009): 47 [Holotype male; Thailand; HMPC.]

Diagnosis. Male. Antennae 20 mm in length. Antennal flagellum first few segments darker brown then lighter throughout with darker striations. Forewing 10 mm and hind wing 6 mm in length. Mesoscutum and mesoscutellum without evident markings. Tibial spurs 2.4.4.

Male genitalia. Inferior appendages two-segmented, harpago blunt towards the apex ( Fig. 156 View Figs ). In lateral view, phallus with spine-like structure at anterior portion of apex ( Fig. 158 View Figs ). In dorsal view, phallus with lobular tongue in anterior part of apex ( Fig. 159 View Figs ). In lateral view, segment X with broad apex ( Fig. 156 View Figs ), forming U-shape at middle of two lobes in dorsal view ( Fig. 157 View Figs ).

Type material examined. Holotype. Thailand: male, Phangnga Province, Sriphanga National Park , coll. T. Prommi, 7 August 2004 (HMPC).

Paratypes. Thailand: 4 males, Phangnga Province, Sriphanga National Park , coll. T. Prommi, 7 August 2004 (HMPC) ; 6 males, Ranong Province, Klongbangmun stream, coll. T. Prommi, 8 October 20014 (HMPC) .

Additional material examined. Laos: 1 male, Boli, Kham Xai Province , coll. V. Kuban, 1–18 May 2001 (HMPC) .

Distribution. Thailand, Laos.

Remarks. The phallus resembles that of M. dione dorsally. However, the phallus of M. seba possesses both dorsal and ventral tongues, whereas that of M. dione has only one ( Fig. 159 View Figs ). The original description of the species included drawings of two types of genitalia and wing patterns. The genitalia drawings included here are based on both the holotype and paratype specimens, and both wing pattern variations were drawn as well ( Figs. 154–159 View Figs ). No female specimens were available for examination.