Eusphalerum minutum ( FABRICIUS 1792)

Zanetti, A., 2008, Synonymies in the European Omaliinae, with notes on distribution (Coleoptera: Staphylinidae), Linzer biologische Beiträge 40 (1), pp. 979-992 : 980-981

publication ID

https://doi.org/ 10.5281/zenodo.5429978

persistent identifier

https://treatment.plazi.org/id/10485D65-5C43-FFDA-FF2D-FCD7FC12E523

treatment provided by

Valdenar

scientific name

Eusphalerum minutum ( FABRICIUS 1792)
status

 

Eusphalerum minutum ( FABRICIUS 1792) View in CoL

Sylpha minuta FABRICIUS 1792. Lectotype female (here designated) labelled "minuta" (original) / Lectotype Sylpha minuta Fabricius, 1792 des. Zanetti, 2008 / Eusphalerum minutum ( Fabricius, 1792) det. Zanetti 2008; 1 paralectotype male, on the same label, without abdomen and part of legs (ZMUC) ( Fig. 31 View Fig ).

Omalium ranunculi GRAVENHORST 1802 View in CoL . Lectotype male (here designated) labelled 6921 / Omalium ranunculi Gravenhorst View in CoL des. Zanetti 2007 / lectotypus (red) / Eusphalerum minutum View in CoL (F.) det. Zanetti 2007 / minutum Er. View in CoL (sic) Silpha m. F. - O. ranunculi Gr. View in CoL (original label), 3 paralectotypes males and 4 paralectotypes females labelled Hist-Coll. ( Coleoptera View in CoL ) Nr. 6921 Anthobium minutum Erichs. Europa Zool. Mus. Berlin (recent label)/ Omalium ranunculi Gravenhorst View in CoL des. Zanetti 2007 / paralectotypus (red); one paralectotype male has also the label "paludosum Heer Helvet. Heer", original) (MNHUB) (Fig. 2).

Anthobium petzianum BERNHAUER 1929 View in CoL nov.syn. Type (female) Schoberstein Austria sup. Mont. Petz / 4352 (FMNH) (Fig. 8).

Anthobium jurassicum JARRIGE 1845 View in CoL nov.syn. Type (male) Juogne Jura VII.26/ Coll. Ph. Naude / Type (red)/ Museum Paris; 1 paratype (male, labelled as cotype), 1 specimen (female, probably paratype, not labelled as paratype) with the same locality label ( MNHNP) (Fig. 1) .

Eusphalerum subjurassicum COIFFAIT 1959 nov.syn. Paratype (male) St Paul B.A. L. Levasseur coll./ subjurassicum Coiff. / Paratype (red)/ Museum Paris (MNHNP) (Fig. 3).

C o m m e n t s: The typical series of Eusphalerum minutum View in CoL includes one damaged male and one female. As the male is without aedeagus, the female is designated as the lectotype. The shape of the elytra allows a positive identification. The typical series of O. ranunculi View in CoL confirms the synonymy with O. minutum View in CoL .

E. petzianum View in CoL was described based on a female from Schoberstein "in der Nähe der Stadt Steyr in Oberösterreich ". Other records from Austria (Salzburg, Steyermark) are reported in HORION (1963, misquoted by HERMAN (2001) that includes also Switzerland, France, Austria and Italy in the distribution of the species). The main character distinguishing E. petzianum View in CoL from E. minutum View in CoL is body size, almost double (3.2 mm). Also, form and puncturation of the pronotum are supposedly distinctive, with the pronotum shorter, and the puncturation twice as coarse and dense. This species was considered a possible junior synonym of E. minutum View in CoL by ZANETTI (1987). The examination of material of E. minutum View in CoL from most parts of Europe confirms this opinion, the type of E. petzianum View in CoL is a large specimen of E. minutum View in CoL (size range reported in the literature is 2-2.5 mm, see COIFFAIT 1959 and ZANETTI 1987; LOHSE 1964 does not indicate the size). Coarse and dense puncturation is often present in large specimens of Eusphalerum View in CoL . Elytra are within the range of variability of E. minutum View in CoL (Fig. 8).

Eusphalerum jurassicum View in CoL was described as close to E. anale (ERICHSON 1840) View in CoL , the main differential charactes being the completely different shape of the aedeagus. No reference to E. minutum View in CoL is given in the original description. COIFFAIT (1959) includes E. jurassicum View in CoL in the "groupe jurassicum " of the subgenus Abinothum and E. minutum View in CoL in the "groupe minutum " of the subgenus Eusphalerum View in CoL . He distinguishes these subgenera by the length of the elytra, a very variable character that is inadequate for defining distinct phyletic lines in Eusphalerum View in CoL . On the other hand, the drawings of the aedeagus, even if very schematic, show that E. jurassicum View in CoL and E. minutum View in CoL are very closely related. LOHSE (1964) follows COIFFAIT and includes E. jurassicum View in CoL in the subgenus Abinothum and E. minutum View in CoL in the subgenus Eusphalerum View in CoL . According to ZANETTI (1987), Abinothum is not a distinct subgenus in Eusphalerum View in CoL and E. jurassicum View in CoL is closely related to E. minutum View in CoL . HERMAN (2001), in the section on E. jurassicum View in CoL , misquotes Lohse (l.c.) as follows: " Lohse, 1964: 36 ( Eusphalerum View in CoL ; subgenus Pareusphalerum; characters; central Europe)". The true page is 32 and the subgenus is Abinothum. SMETANA (2004) follows Herman (l.c.) and includes E. jurassicum View in CoL in the sugenus Pareusphalerum. In the original description the typical series of E. jurassicum View in CoL includes 2 males (type, paratype) and 2 females (two paratypes). I have examined the type, 1 male paratype and 1 female not labelled as paratype with a locality label identical to the one of the type. They all are evidently small specimens of E. minutum View in CoL , a species widely distributed in Central Europe, whose size range is usually 2-2.5 mm (see above). Possibly Jarrige was fooled by the small size of the specimens (1.7 mm), but the aedeagus allows a reliable identification as E. minutum View in CoL (Fig.1, the paratype is represented because the aedeagus of the type, dissected by Jarrige himself, is strongly dried and inadequate for a slide preparation). Differences that can be observed in the shape of the aedeagus are artefacts resulting from the conservation of the specimen, strongly dried specimens have sunken lateral margins in the median lobe (Figs 1, 2 and 3). Also, the shape of the apex of the elytra of the female is within the range of variability of E. minutum View in CoL , it is not sinuate near the apex of the suture as is often the case in small specimens (Figs 5-8).

Eusphalerum subjurassicum was described based on specimens from the Basses-Alpes (Saint-Paul-sur-Ubaye leg. Fagniez, coll. Levasseur). The external characters supposedly distinguishing it from E. jurassicum View in CoL (head with two normal frontal tips, without furrows nor fore small tips) and the shape of the aedeagus are within the variability range of E. minutum View in CoL (Fig. 3). The examination of a male paratype confirms the synonymy.

MNHNP

Museo Nacional de Historia Natural del Paraguay

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Staphylinidae

Genus

Eusphalerum

Loc

Eusphalerum minutum ( FABRICIUS 1792)

Zanetti, A. 2008
2008
Loc

Eusphalerum subjurassicum

COIFFAIT 1959
1959
Loc

subjurassicum Coiff.

COIFFAIT 1959
1959
Loc

Eusphalerum subjurassicum

COIFFAIT 1959
1959
Loc

Anthobium petzianum

BERNHAUER 1929
1929
Loc

E. petzianum

BERNHAUER 1929
1929
Loc

E. petzianum

BERNHAUER 1929
1929
Loc

E. petzianum

BERNHAUER 1929
1929
Loc

Anthobium jurassicum

JARRIGE 1845
1845
Loc

Omalium ranunculi GRAVENHORST 1802

Gravenhorst 1802
1802
Loc

Omalium ranunculi

Gravenhorst 1802
1802
Loc

O. ranunculi Gr.

Gravenhorst 1802
1802
Loc

Omalium ranunculi

Gravenhorst 1802
1802
Loc

O. ranunculi

Gravenhorst 1802
1802
Loc

Coleoptera

Linnaeus 1758
1758
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