Cooka incisa (Cook, 1956),

Haenni, Jean-Paul & Paltrinieri, Lucia Pollini, 2021, First report of Cooka incisa (Beekey, 1937) from Europe (Diptera, Scatopsidae), Alpine Entomology 5, pp. 1-4: 1

publication ID

http://dx.doi.org/10.3897/alpento.5.60974

publication LSID

lsid:zoobank.org:pub:517359AA-3AF8-404D-858A-DAAF932D4169

persistent identifier

http://treatment.plazi.org/id/AE300262-4909-5925-9C78-B8C586F237A5

treatment provided by

Alpine Entomology by Pensoft

scientific name

Cooka incisa (Cook, 1956)
status

 

Cooka incisa (Cook, 1956)  Figs 1-4View Figures 1–4, 5View Figure 5

Rhexoza incisa  Cook, 1956: Ann. Ent. Soc. Am. 49: 6, figs 2A, 2G, 3B.

Rhexoza incisa  Cook in Stone & al., 1965: Cat. Dipt. N. Amer.: 240.

Rhexoza incisa  Cook, 1975: Pan-Pac. Entomol. 51: 66, figs 13, 24-25.

Rhexoza incisa  Cook, 1981: Manual of Nearctic Diptera  1: 315, figs 20-22.

Cooka incisa  (Cook, 1956): Amorim 2007: Zootaxa 1640: 48.

Material studied

(12♂♂, 4♀♀). Switzerland, TI: Bolle di Magadino, [Gordola, Reviscài], 199 m, 710.121/114.037 [46°10'07.685"N, 8°51'52.248"E], forest, mid June-end July 2000, 1♂; same locality but mid June-end July 2001, 3♂♂ 1♀; same locality but mid June-end July 2004, 2♂♂; same locality but mid June-end July 2005, 2♂♂, all P. Duelli leg., CGB, MHNN; Lugano, 24.VI-5.VIII.2006,1♂, Th. Sattler leg., MHNN; Losone, Arcegno, Collina di Maia, 420 m, 701.151/113.376 [46°09'51.337"N, 8°44'53.687"E], ARC1, 21-28.VII.2015, birra bianca, 2♀♀; same, but 7-18.VIII.2015, 1♂ 1♀; same, but 411 m, 701.013/113.741 [46°10'03.240"N, 8°44'47.535"E], ARC2, 28.VII-7.VIII.2015, vino, gialla, 1♀; same, but, 366 m, 701.307/113.196 [46°09'45.434"N, 8°45'00.812"E], ARC3, 7-26.VII.2016, birra bianca, 1♂, all L. Pollini & M. Abderhalden leg., MSNL.

Diagnosis.

Body, elongate (Fig. 1View Figures 1–4), dull in general appearance, except for contrasting, shining tergite 7 and basally sub-shining sternite 7 in male. Wing venation (Fig. 2View Figures 1–4) very similar to that of Rhexoza  species and of the cosmopolitan Coboldia fuscipes  . Tergite 7 (Fig. 3View Figures 1–4) with median posterior projection broad, sternite 7 deeply incised medially, genital capsule (Fig. 3View Figures 1–4) with elongate, pointed, posteriorly directed lateral projections, aedeagus short. Female (Fig. 4View Figures 1–4) with tergite 8 deeply incised medially, sternite 8 broadly divided in two basally broad, apically pointed lateral lobes.

The Swiss material perfectly agrees with the description and figures of North American specimens of this species, especially regarding the very characteristic shape of the male genital capsule (Cook, 1981: fig. 20.22, and present paper, Fig. 3View Figures 1–4). Cooka incisa  will run to Rhexoza  in the key to the Palaearctic genera of Scatopsidae  ( Haenni 1997), but can be differentiated from the four known European species of Rhexoza  by the features given in the diagnosis. Furthermore, the pregenital segment of C. incisa  is shiny, strongly contrasting with the other abdominal tergites in the male, which are dull (pregenital segment only partly shining in female). All tergites are dull in Rhexoza  .

Distribution.

Cooka incisa  was described by Cook (1956) (as Rhexoza incisa  ) from the Great Lakes region (USA: Iowa, Illinois, Minnesota; Canada: SE Ontario). It is recorded here for the first time from Europe and the Palaearctic region as a whole. In Europe it is presently known only from the Swiss canton of Ticino in the localities cited above.

Biology.

"The larvae of this species have been collected from beneath the bark of dead American elm [ Ulmus americana  ], box elder [ Acer negundo  ] and cottonwood [ Populus  spp.] trees" in the USA ( Cook 1956: 8), where this species is bound to wet areas. One of the Swiss localities, namely Bolle di Magadino, is a riverine forest which presents similar characteristics (main tree species are Alnus glutinosa  , Fraxinus excelsior  , Quercus robur  , Ulmus  spp., Salix alba  and Populus  spp., while Acer negundo  is also present in the region). In Arcegno, on the other hand, C. incisa  was caught in a forest consisting of chestnut ( Castanea sativa  ) together with oak ( Quercus petraea  , Q. pubescens  , Q. robur  and Q. rubra  ) ["castagneto con querce"].

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Scatopsidae

Genus

Cooka

Loc

Cooka incisa (Cook, 1956)

Haenni, Jean-Paul & Paltrinieri, Lucia Pollini 2021
2021
Loc

Rhexoza incisa

Cook 1956
1956
Loc

Rhexoza incisa

Cook 1956
1956
Loc

Rhexoza incisa

Cook 1956
1956
Loc

Rhexoza incisa

Cook 1956
1956