Isosoma Billberg, 1820a : 56

Bezděk, Jan & Biondi, Maurizio, 2018, On the generic names proposed in Chrysomelidae (Coleoptera) by Gustaf Johan Billberg, Zootaxa 4422 (2), pp. 184-190: 185-186

publication ID

https://doi.org/10.11646/zootaxa.4422.2.2

publication LSID

lsid:zoobank.org:pub:97D4058C-25EF-4EA3-820E-53DA925F736A

persistent identifier

http://treatment.plazi.org/id/03ACFC32-5E47-FFE8-FF5B-B90AFAAB45F3

treatment provided by

Plazi

scientific name

Isosoma Billberg, 1820a : 56
status

 

Isosoma Billberg, 1820a: 56 

Names originally included:

1. 14punctatus available name for Chrysomela quatuordecimpunctata Linnaeus, 1767  ; now Podontia quatuordecimpunctata (Linnaeus, 1767)  ; genus Podontia Dalman, 1824  ( Galerucinae  ,

Alticini)

2. affinis  available name for Galleruca affinis Gröndal, 1808  ; now Podontia affinis (Gröndal, 1808)  ; genus Podontia Dalman, 1824  ( Galerucinae  , Alticini)

3. grandis  available name for Galleruca grandis Gröndal, 1808  ; synonym of Podontia lutea Olivier, 1790  ; genus Podontia Dalman, 1824  ( Galerucinae  , Alticini)

4. concolor  available name for Chrysomela concolor Fabricius, 1781  ; now Phygasia concolor (Fabricius, 1781)  ; genus Phygasia Dejean, 1836  ( Galerucinae  , Alticini)

5. lusitanica nomen nudum

6. mutabilis var. c unavailable name

7. bivittata  available name for Crioceris bivittata Fabricius, 1801  ; now Acalymma bivittatum (Fabricius, 1801)  ; genus Acalymma Barber, 1947  ( Galerucinae  , Luperini  )

8. innuba  available name for Cistela innuba Fabricius, 1775  ; now Acalymma innubum (Fabricius, 1775)  ; genus Acalymma Barber, 1947  ( Galerucinae  , Luperini  )

Type species. Chrysomela concolor Fabricius, 1781  , designated by Barber (1947).

Current status. Phygasia Chevrolat, 1836  (nomen protectum) = Isosoma Billberg, 1820  (nomen oblitum).

Comments. Billberg (1820a) listed under the genus Isosoma  eight names. Two of these names are not available (lusitanica because nomen nudum, mutabilis var. c because unavailable one-letter name of variety). Additional six names are instead available names (see above).

Barber (1947) designated Chrysomela concolor Fabricius, 1781  as type species of the genus Isosoma  . Fabricius (1781) described Chrysomela concolor  from „Africa aequinoctialis“ from Banks collection. Later, Fabricius (1792) himself transferred this species to the genus Galleruca  and finally (Fabricius 1801) to the genus Adorium Fabricius, 1801  . Because Adorium  is a synonym of Oides Weber, 1801  , subsequent authors (Gemminger & Harold 1876, Weise 1924, Barber 1947) attributed Chrysomela concolor  to this latter genus. Barber (1947) did not examined the types but simply chose Chrysomela concolor  as type species for synonymizing Isosoma  with Oides  . Subsequent Galerucinae  catalogues ( Wilcox 1971, Beenen 2010, Nie et al. 2017) followed Barber´s act and listed Isosoma  as synonym of Oides  .

Vachon (1980) examined the types of Chrysomela concolor Fabricius, 1781  deposited in Banks collection in BMNH and found it is not a representative of Oides  , but of the flea beetle genus Phygasia Dejean, 1836  ( Galerucinae  , Alticini). Vachon probably did not know Barber´s publication with the designation of the type species of Isosoma  , because this topic is not commented on.

In 2017, one of us (JB) re-examined the Fabrician type specimens in Banks collection and confirmed the generic assesment of Chrysomela concolor  in Phygasia Chevrolat, 1836  (for the photo of the type specimen see Figs 1-3 View Figure ). The acceptance of the above mentioned acts would led to restoration of Isosoma  as valid genus with the species-rich Phygasia  as its synonym. In order to preserve the stability, we proposed to activate the Art. 23.9 of ICZN (1999), considering Isosoma  as nomen oblitum and Phygasia  as nomen protectum. To our knowledge, Isosoma  was not treated as a valid generic name after 1900 and, thus, the conditions in Article 23.9.1.1 are complied. In addition, also Barber (1947) explicitely mentioned Isosoma  as synonym of Oides  . To meet the conditions of Art. 23.9.1.2, we supply the references of 25 papers below, published by at least 10 authors in the immediately preceeding 50 years, and encompassing a span of not less than 10 years, where Phygasia Chevrolat  is used as valid genus name: Biondi & D’Alessandro (2010, 2012, 2013, 2016), Chen & Wang (1980), Ge et al. (2008, 2010), Hua et al. (2014), Jolivet (1991), Kimoto (1971, 2000a, 2000b), Lee (2012), Medvedev (1995, 1996, 2001, 2004, 2007, 2009), Scherer (1969a, 1969b, 1972), Tiberghien (1976), Wagner (1999), Wang & Yu (1992).

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Chrysomelidae

Loc

Isosoma Billberg, 1820a : 56

Bezděk, Jan & Biondi, Maurizio 2018

2018
Loc

Isosoma

: 56