Ranatra longipes longipes Stål, 1861

Polhemus, Dan A. & Polhemus, John T., 2013, Guide To The Aquatic Heteroptera Of Singapore And Peninsular Malaysia. X. Infraorder Nepomorpha-Famlies Belostomatidae And Nepidae, Raffles Bulletin of Zoology 61 (1), pp. 25-45 : 36

publication ID

https://doi.org/ 10.5281/zenodo.5351508

persistent identifier

https://treatment.plazi.org/id/03C6879C-103B-7315-FF1A-FDC4DA19AE3F

treatment provided by

Tatiana

scientific name

Ranatra longipes longipes Stål, 1861
status

 

Ranatra longipes longipes Stål, 1861 View in CoL

( Figs. 8 View Fig , 19, 20 View Figs , 25 View Figs , 27 View Figs )

Ranatra longipes Stål, 1861: 203 View in CoL

Ranatra longipes longipes: Lansbury, 1972: 332 View in CoL

Material examined. — The following additional records are in addition to those listed in Tran & Polhemus (2012): MALAYSIA, Johor: 1 male, Sungai Kayu , 12 Mar.1998, H. H. Tan & O. S. K. Chia, THH9823 ( ZRC); 1 male, 1 female, Mawai, 27 Mar.1992, ZRC 6.22212, coll. unk. ( ZRC) .

Extralimital material examined. — The following extralimital records are in addition to those listed in Tran & Polhemus (2012): MALAYSIA, Sabah: 2 males, Borneo, Sungai Kinabatangan, puddle nr. Danau Biandum Besar, 11 Apr.1994, coll. H. K. Lua & C. Y. Chang ( ZRC) . Sarawak: 3 females, Borneo, Sibu, Sungai Teku, 15 May 1994, MK94-23, coll. unk. ( ZRC) . INDONESIA, Sumatera Barat Prov. : 10 males, 10 females, Sumatra, Bukittingi, Lawang, 5 Jul.1992, W. G. Ullrich ( USNM) .

Diagnosis. — Male body length 21–26 mm, length of respiratory siphon 16–22 mm; female body length 24–27 mm, length of respiratory siphon 16–22 mm. Colouration medium brown, legs in some specimens weakly annulate with lighter brown. Head with vertex slightly raised above the eyes, sometimes with small incipient tubercle. Ventral prothorax with a prominent medial longitudinal carina present along entire length. Fore femur long and slender with two teeth distal to midpoint on the margin adjacent to the infolded tibia, consisting of a moderate sized tooth on outer face and a smaller tooth on inner face ( Fig. 27 View Figs ); middle tibia longer than both middle and hind femora; hind tibia distinctly longer than middle tibia; hind femora in both sexes slightly exceeding operculum. Male paramere with a moderately narrow and deep incision subapically, isolating an apically expanded and weakly toothed distal hook; subapical lobe absent or at best barely suggested ( Figs. 19, 20 View Figs ).

Distribution. — The nominate subspecies of R. longipes was described from Java ( Stål, 1861), with subsequent records from Sumatra ( Lundblad, 1933), Borneo ( Lansbury, 1972), Peninsular Malaysia (Fernando & Cheng, 1974), and Sulawesi (Nieser & Chen, 1991); the latter authors also made passing reference to specimens from Bali, but provided no specific data. Lansbury (1972) also described the subspecies R. longipes thai from Thailand (later elevated to full species status by Tran & D. Polhemus, 2012) and R. longipes celebensis from the southwestern peninsula of Celebes. As discussed by Tran & D. Polhemus (2012) most if not all of the Malaysian records of R. longipes longipes north of Johor represent R. thai Lansbury. Based on currently understood distributional patterns, it now appears that R. longipes is a predominantly insular species occurring on the Greater Sunda Islands and immediately adjacent smaller islands eastward to Sulawesi, with the westward limits of its range being reached in the extreme southern Peninsular Malaysia and Singapore. Detailed distribution data for the nominate subspecies were provided by Tran & D. Polhemus (2012), who listed further records from Singapore, Malaysia (Johor and Sabah), and Indonesia (Java, Sumatra, and Borneo).

Discussion. — Ranatra longipes is a relatively slender, delicate species, with males noticeably smaller in size than females. It may be separated from the very similar R. thai by the structure of the distal hook on the male paramere (compare Figs. 19, 20 View Figs to 21, 22), and by the longer hind tibia in relation to the middle tibia. The male genitalic figures attributed to this species in Chen et al. (2005, pg. 53, figs. 34, 35) in fact represent R. thai (see below).

ZRC

Zoological Reference Collection, National University of Singapore

USNM

Smithsonian Institution, National Museum of Natural History

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Hemiptera

Family

Nepidae

Genus

Ranatra

Loc

Ranatra longipes longipes Stål, 1861

Polhemus, Dan A. & Polhemus, John T. 2013
2013
Loc

Ranatra longipes longipes:

Lansbury, I 1972: 332
1972
Loc

Ranatra longipes Stål, 1861: 203

Stal, C 1861: 203
1861
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