Tetropina fulgescens (Enderlein)

Stark, Bill P. & Sivec, Ignac, 2007, Studies Of Indonesian Perlidae (Plecoptera), With Descriptions Of Three New Species, Illiesia 3 (7), pp. 53-64 : 62

Tetropina fulgescens (Enderlein)

( Figs. 26‐31 )

Ochthopetina fulgescens Enderlein, 1909:337 . Holotype ♀, Kina Balu , North Borneo

Ochthopetina (?) fulgescens: Zwick, 1973a:498 . Redescription

Tetropina fulgescens: Zwick, 1984:171 . Redescription Tetropina larvata Klapálek, 1909:223 . New synonymy

Material examined. Indonesia: East Kalimantan: Kac. Pujungan, Kayan‐ Mentarang Nature Reserve, Long Alango , Bahau River , 2° 52’ N, 115° 49’ E, 1‐3 March 1993, IIS 930030, D.C. Darling, 4 ♂, 2 ♀ ( ROM, BPS) . Same site, IIS 930031, D.C. Darling, 1 ♂ ( MZB) . Same site, IIS 930000, 20 February‐4 March 1993, D.C. Darling, 1 ♂ ( MZB) . Long Tua, Bahau River , 3° 10’ N, 115° 47’ E, 440 m, 8 April 1994, IIS 940550, B. Hubley, 21 ♂ pinned ( MZB, ROM) . Same site, 8 April 1994, IIS 940547, B. Hubley, 16 nymphs ( MZB, ROM) . Same site, 5‐9 April 1994, IIS 940526, B. Hubley, D.C. Darling, 1 ♂ ( ROM) . Kayan‐ Mentarang Nature Reserve, Lalut Birai , 2° 52’ N, 115° 49’ E, 378 m, 28 March‐16 April 1994, IIS 940507, B. Hubley, D.C. Darling, 11 ♂ ( ROM, MZB) . Same site, March 1994, IIS 940026, D.C. Darling, 1 ♂ pinned ( ROM) . Same site, January 1994, IIS 940003, D.C. Darling, 1 ♂ ( MZB) . Same site, 20 February‐4 March 1993, IIS 930003, D.C. Darling, 1 nymph ( ROM) . Apau Ping , 3° 6’ N, 115° 49’ E, 438 m, 3 April 1994, IIS 940527, B. Hubley, D.C. Darling, 1 ♂ ( ROM) . East Malaysia: Sabah: tributary of Sungai Moyog , 11 mi E Panampung, mile 17, 29 October 1978, G.F. Edmunds, C.H. Edmunds, 24 ♀ ( BPS) .

Remarks. Although there are two apparent Bornean Tetropina species , the small number of specimens available and the fact that the type specimens of T. fulgescens and T. larvata are opposite sexes led Zwick (1984) to suggest the possibility that the two names might represent only one species. We are able to formally establish this synonymy on the basis of the long series of males listed above which share hemiterga of the “ T. larvata ” type (sensu Zwick 1984) and are associated with females (and mature egg bearing nymphs) of the T. fulgescens type. Zwick’s (1984) figure of an egg taken from the holotype shows the chorionic surface to be coarsely punctate with shallow, widely spaced pits, and a distinct operculum is present. This figure is in agreement with scanning electron micrographs prepared from eggs taken from the females listed above ( Figs. 26‐27 ) and from mature nymphs ( Figs. 28‐29 ) from the same sites. Eggs taken from females of a Sabah population are also shown to indicate variation in chorionic morphology for this species ( Figs. 30‐31 ). Zwick (1984) suggested the anchor might be mushroom shaped but these figures clearly show the medusoid character of the structure which Zwick (2000) discovered.

A consequence of this synonymy is the female specimen of “ T. larvata ” from “Midden, O. Borneo, 24.VIII.1925 (Siebers; ML)” in Zwick 1984, and the three male specimens of T. fulgescens ( Zwick 1984) are left without a name. We are not proposing a new name (or names) at this time, however, since we have not studied these specimens.

Figures

Figs. 26‐31. Tetropina fulgescens eggs. 26. Entire egg from Kalimantan female, 27. Lid from Kalimantan female, 28. Entire egg from pre‐emergent Kalimantan nymph, 29. Lid from pre‐emergent Kalimantan nymph, 30. Entire egg from Sabah female, 31. Anchor from Sabah female.