The water striders of Pakistan (Hemiptera: Heteroptera: Gerridae): new records from Punjab and first checklist for the country Author Cianferoni, Fabio National Research Council of Italy, Research Institute on Terrestrial Ecosystems (CNR-IRET), Via Madonna del Piano 10, I- 50019 Sesto Fiorentino (Florence), Italy. & University of Florence, Natural History Museum, “ La Specola ”, Zoology, Via Romana 17, I- 50125 Florence, Italy. Author Saleem, Rukhshanda 0000-0001-5291-2843 University of Gujrat, Department of Zoology, Hafiz Hayat Campus, Jalalpur Jattan Road, Gujrat, Punjab 50700, Pakistan. sumera. afsheen @ uog. edu. pk; https: // orcid. org / 0000 - 0001 - 5291 - 2843 & University of Sialkot, 1 - km Main Daska Road, Sialkot, Punjab 51310, Pakistan. sumera.afsheen@uog.edu.pk Author Afsheen, Sumera 0000-0001-5291-2843 University of Gujrat, Department of Zoology, Hafiz Hayat Campus, Jalalpur Jattan Road, Gujrat, Punjab 50700, Pakistan. sumera. afsheen @ uog. edu. pk; https: // orcid. org / 0000 - 0001 - 5291 - 2843 sumera.afsheen@uog.edu.pk Author Zia, Ahmed NARC-National Agricultural Research Centre, Park Road, Islamabad 44000, Pakistan. text Zootaxa 2021 2021-07-06 4996 3 469 491 journal article 10.11646/zootaxa.4996.3.3 1175-5326 5074713 205E48E2-AA8C-488D-81CB-46AF357FA60B Aquarius adelaidis ( Dohrn, 1860 ) Gerris argentata Spinola 1837: 65 (preoccupied by Gerris argentatus Schummel, 1832 ). Gerris adelaidis Dohrn 1860: 408 . Gerris spinolae Lethierry & Severin 1896: 63 (new name for Gerris argentata Spinola, 1837 ). Syn. Lundblad (1933: 372) .— Pakistan : Pruthi (1933: 102 . Punjab Province , Jhelum District, Chalisa). Aquarius adelaidis : Andersen 1990: 61 .— Pakistan : Buzzetti et al. (2006: 40 . Sindh Province , Thatta District, Keenjhar Lake). Material examined: Gujranwala District: Upper Chenab canal, Nandipur, Gujranwala, 32.254099° N 74.269467° E , 24.X.2016 , 1 ♂ , ♀ apt.; Upper Chenab canal, Master City Housing Scheme, Gujranwala, 32.130067° N 74.214012° E , 30.X.2016 , 1 ♀ macr.; Nullah Palkhu, Grand Trunk Road Wazirabad, 32.449509° N 74.112278° E , 11. V .2016 , 2 ♀ macr.; idem , 1 ♂ , 1 ♀ macr., det. FC ( CFC ). Gujrat District : Upper Jhelum canal near Pathan Colony , Kharian , 32.719544° N 73.795622° E , 18.XII.2016 , 2 ♀ macr.; idem , 24. VI .2018, 2 ♂ . 3 ♀ macr.; Upper Jhelum canal near Village Jaura , Kharian , 32.654499° N 73.816865° E , 13.VIII.2017 , 1 V instar nymph ♀ , det. FC ( CFC ) ; idem , 24. VI .2018, 1 ♂ , 5 ♀ macr.; Upper Jhelum canal Grand Trunk Road Sarai Alamgir , 32.890852° N 73.768194° E , 16.VII.2017 , 2 ♂ macr.; idem , 24. VI .2018, 2 ♂ , 2 ♀ macr.; Upper Jhelum canal near Simbli Sharif Road Sarai Alamgir , 32.865010° N 73.713452° E , 18.XII.2016 , 1 ♂ macr.; idem , 24. VI .2018, 5 ♂ , 3 ♀ macr.; River Jhelum , Grand Trunk Road , 32.917846° N 73.723696° E , 11.XII.2016 , 4 ♂ , 4 ♀ macr., 5 ♂ , 6 ♀ brach.; idem , 16.VII.2017 , 7 nymphs ; idem , 13.VIII.2017 , 2 ♂ , 3 ♀ macr., 2 ♂ , 2 ♀ brach .; idem , 17.IX.2017 , 3 ♂ , 4 ♀ macr., 3 ♀ brach .; idem , 2 ♂ brach., 2 ♀ macr., det. FC ( CFC ) ; idem , 22.X.2017 , 5 ♂ , 3 ♀ macr., 2 ♂ brach., 12 nymphs ; idem , 24. VI .2018, 6 ♂ , 4 ♀ macr.; Upper Jhelum canal near Tarikha Village , Gujrat , 32.497335° N 74.016565° E , 26. VI .2018, 4 ♂ , 3 ♀ macr.; idem , 30.X.2019 , 4 ♂ , 2 ♀ , macr. Sialkot District : Pond near Jaje Village , 32.394221° N 74.628148° E , 29.X.2016 , 1 ♂ macr.; idem , 10.VII.2017 , 1 ♀ macr.; Marala Ravi link canal near Basi wala pul , 32.222449° N 74.590056° E , 12.III.2016 , 1 ♂ , 2 ♀ macr., 1 ♂ brach.; idem , 2 ♂ macr., det. FC ( CFC ) ; idem , 10.VII.2017 , 1 ♀ macr .; idem , 22. VI .2018, 2 ♂ , 4 ♀ macr., 1 ♀ brach.; Marala Ravi link canal near Kotli Baba Faqir Chand , 32.293986° N 74.526254° E , 16.IX.2017 , 1 ♂ , 3 ♀ . 20 nymphs ; idem , 8.XII.2017 , 2 ♂ , 2 ♀ macr., 1 nymph ; idem , 22. VI .2018, 1 ♂ , macr.; pond near Dar Rice Mills , Bhoroki , Pasrur Road , 32.403149° N 74.603264° E , 7.X.2017 , 1 ♂ , 1 ♀ macr.; Marala Ravi link canal near Canal City Housing Society , 32.475159° N 74.422701° E , 23. VI .2018, 4 ♂ macr.; Upper Chanab canal near Zafarwali , 32.478587° N 74.376158° E , 28.IX.2017 , 2 ♀ macr.; idem , 2 ♂ macr, det. FC ( CFC ) ; idem , 15.X.2017 , 2 ♂ , 2 ♀ macr.; flood drainage canal near Behari Colony , 32.320839° N 74.393796° E , 29.XI.2016 , 1 ♂ , 5 ♀ macr.; Marala Ravi link canal near Motra , 32.367782° N 74.419769° E , 12.VIII.2017 , 1 ♀ macr.; idem , 23. VI .2018. 4 ♀ macr., 3 ♂ , 1 ♀ brach. General distribution. This water strider species occurs throughout the Oriental Region with records from Pakistan (known western limit of the species), India , Nepal , Sri Lanka , Bangladesh , Myanmar , Thailand , Laos , Vietnam , China ( Hainan ), Malaysia (peninsular and Borneo), Singapore , and Indonesia ( Sumatra ) (see Damgaard et al. 2014 ). Remarks. This species was recorded from Punjab by Pruthi (1933) . More recently, it was recorded from Keenjhar Lake in Sindh Province ( Buzzetti et al. 2006 ), which is about 1000 km south-southwest of the study area.