On nomenclature and synonymy of Trichius rosaceus, T. gallicus, and T. zonatus (Coleoptera: Scarabaeidae: Cetoniinae: Trichiini)
Author
Krell, Frank-Thorsten
text
Zootaxa
2012
3278
61
68
journal article
10.5281/zenodo.280850
f97fe3e2-5d5b-4b24-8a96-592412c6ac59
1175-5326
280850
Trichius zonatus
Germar, 1831
(valid subspecies name),
lectotype
designation
The other name currently in use for the species called
Trichius rosaceus
Voet
by the authors listed above and others is
Trichius zonatus
Germar, 1831
. Germar described
Trichius zonatus
from Sardinia,
Greece
and
Anatolia
,
Turkey
. The distribution indicates that he might have subsumed more than one species under his name, namely the true
T. zonatus
from Sardinia plus one or two species that occur in
Greece
and
Anatolia
, because the only species occurring in Sardinia (
Carpaneto & Piattella 1995
) occurs neither in
Greece
nor
Anatolia
(
Mikšiċ 1959
;
Baraud 1992
,
Carpaneto
et al.
2000
,
Smetana 2006
), but Germar’s description of the white marks on the penultimate abdominal segment fits perfectly what we today call
T. zonatus
or
T. gallicus
and can be considered a species-specific character.
Type
material could neither be traced in the Museum für Naturkunde Berlin (J. Frisch
in litt
.,
Apr. 2010
) nor in the Deutsches Entomologisches Institut Müncheberg (L. Behne
in litt
.,
Apr. 2011
), nor in the Zoologische Sammlung der Martin-Luther-Universität Halle (K. Schneider
in litt
.,
Jan. 2011
). In Burmeister’s collection in Halle, seven specimens of
T. zonatus
with locality ‘Sardinien” are present, but according to
Burmeister (1842: 760)
, he had only three specimens from Sardinia which he had received from Gené as
T. fasciolatus
. Five years after Germar,
Gené (1836)
described the same Sardinian taxon as
Trichius fasciolatus
, but soon recognized the synonymy himself (
Gené 1839
) and used
Trichius zonatus
Germar
as the valid name.
According to his account, Burmeister did have Germar’s
types
in his collection, a male and a female “aus dem Littoral”, but they cannot be identified from the seven Sardinian specimens present today. The Germar collection was split up and distributed by Hermann Rudolph Schaum (
Horn
et al.
1990
) who certainly kept
Cetoniinae
(including
Trichiini
) for his own collection. Those went via A. Melly to the Muséum d’Histoire Naturelle in Geneva in 1843 (
Horn
et al.
1990
) where one of the
syntypes
of
Trichius zonatus
could be traced. This specimen is a male and is herewith
designated as the
lectotype
of
Trichius zonatus
Germar, 1831
(
Figs 1–3
). The
lectotype
corresponds to original description and engraving with the exception of the inner spot of the pre-apical yellow band on the elytra. This spot clearly protrudes toward the apex in the
lectotype
whereas it is shown as a narrow transversal band in the original engraving. This is well within the intraspecific variation (see
Ballerio
et al.
2010
) and might mean that the illustrator used another specimen from the
type
series. The
lectotype
has the following labels (
Fig. 4
): tiny silver quadrate, “
zonatus
/ Germ. typ.” [handwritten by H.R. Schaum], “Schaum. /
TYPE
” [first line handwritten], “Coll.Melly” [typeset], “
LECTOTYPUS
/
Trichius
/
zonatus
GERMAR 1831
/ des. F.-T. Krell 2011” [handwritten on red cardboard].
Identification of the
lectotype
.
The specimen (
Figs 1–3
) is fragile, but almost complete, with only the left protarsomeres III–V, the right protarsomeres II–V and the left metatarsal claw missing. The male
lectotype
, bearing a white stripe on each side of the penultimate sternite (
Fig. 3
), together with the anterior black elytral band being restricted to the humeral region (
Fig. 1
) and the mesotibiae being only slightly emarginated laterally, is clearly identifiable as the species currently called
T. rosaceus
or
T. zonatus
. The extended black coloration on the posterior part of the elytra (
Fig. 1
) together with the shorter pronotal setae leaving a small discal area bald indicates that the specimen belongs to the Sardinian-North African subspecies (
Paulian & Baraud 1982
;
Dutto 2005
; figures in
Baraud 1985
and
Ballerio
et al.
2010
).