Hylaeus (Dentigera) kahri (Förster, 1871)

Vertommen, Win, Vanormelingen, Pieter, D’Haeseleer, Jens, Wood, Thomas J., Baugnée, Jean-Yves, Blanck, Tim De, Grave, David De, Rycke, Samuel De, Deschepper, Chantal, Devalez, Jelle, Feys, Simon, Foubert, Olivier, Jacobs, Maarten, Janssen, Kobe, Legrain, Benjamin, Molenberg, Jean-Marc, Pauly, Alain, Pasau, Bernard, Reynaerts, Annie, Verheyen, Stefan, Wallays, Henk, Wielandts, Maarten & Vereecken, Nicolas J., 2024, New and confirmed wild bee species (Hymenoptera: Apoidea: Apiformes) for the fauna of Belgium, with notes on the rediscovery of regionally extinct species, Belgian Journal of Entomology 149, pp. 1-64 : 23-24

publication ID	https://doi.org/10.5281/zenodo.16958242
publication LSID	lsid:zoobank.org:pub:387AD02A-54C0-4D7E-BF1F-FA0F748217F7
persistent identifier	https://treatment.plazi.org/id/1B4187C4-FFF6-FFF4-FBA8-FB2AFAEA986E
treatment provided by	Felipe
scientific name	Hylaeus (Dentigera) kahri (Förster, 1871)
status

Treatment

Hylaeus (Dentigera) kahri (Förster, 1871) View in CoL – Belg. sp. nov.

Figs 4 View Fig , 10 View Fig G-H

SHORT DESCRIPTION: A small Hylaeus species (4.5 – 5.5 mm). Males can be recognised by the bump on sternite three and the widened, partly yellow antennal scapes. Females have to be identified under a microscope. They can easily be confused with H. gredleri (Förster, 1871) or other species from the Dentigera subgenus ( DATHE, 1980).

DISTRIBUTION IN EUROPE: South-western Europe to Iran. Mediterranean, Black Sea and Caucasus countries ( DATHE, 1980). In North Africa found in Algeria. Northwards to the Grand Duchy of Luxembourg ( FEITZ, 2003; HERRERA MESÍAS & WEIGAND, 2021), Germany, France, Czech Republic, Slovakia and Romania ( SCHEUCHL & WILLNER, 2016). No records from the Netherlands ( REEMER, 2018, www.waarneming.nl) or from the United Kingdom ( ELSE & EDWARDS, 2018).

EU RED LIST STATUS: Data deficient (DD) ( NIETO et al., 2014)

ORIGIN OF RECORDS:

- NAMUR PROVINCE. Yvoir; 1♂; 1.viii.2015; leg./coll./det. K. Janssen. 2♂♂; 13.vii.2020; leg./coll. D. De Grave; det. W. Vertommen, D. De Grave. Doische; 1♂; 26.v.2018; leg./coll. D. De Grave; det. D. De Grave, W. Vertommen.Viroinval (Namur); 1♂; 1.vi.2022; leg . T. Vandaudenard; coll . ULB; det. W. Vertommen. 1♂; 4.vii.2022; leg .

(White pan trap) /det. T. Vandaudenard; coll. ULB. 1♀; 22.vii.2022; leg. J. Stukkens; det. W. Vertommen.

- ANTWERP PROVINCE. Antwerpen; 1♂; 27.vi.2021; leg./coll./det. W. Vertommen. 1♂; 15.v.2022; leg./coll. M. Wielandts; det. W. Vertommen, M. Wielandts. 1♀ 1♂; 2.vi.2022; leg./coll. D. De Grave; det. D De Grave, W. Vertommen. 5♂♂; 3.vi.2022; leg./det. S. Verheyen. 5♂♂ - Figs. 10 View Fig G-H; 15.vi.2022; leg./coll. K. Schoonvaere; det. K. Schoonvaere, W. Vertommen. 2♂♂; 26.vi.2022; leg./coll./det. M. Wielandts. 1♀; 28.vi.2022; leg. S. Verheyen; coll. K. Schoonvaere; det. W. Vertommen. 1♂; 28.v.2023; leg./coll./det. M. Wielandts. 1♂; 4.vi.2023; leg./det. 1♀; S. Verheyen. 25.vi.2023; leg./ det. S. Verheyen.

COMMENTS:

- Established populations have been found in several localities in Antwerp. After continued surveys by multiple citizen scientists, the first females from this species have been caught in the summer of 2022. Because of the strong resemblance with H. gredleri , it is likely that some H. kahri females have been released and identified incorrectly as H. gredleri in the past.

- The first and only record from the Grand Duchy of Luxembourg, also a male, dates from 2001 ( FEITZ et al., 2003; HERRERA MESÍAS & WEIGAND, 2021).

- The species is fairly hard to find and recognise. We are convinced that the species occurs in more locations than we know of in Belgium and that it already occurs in the Netherlands.