Hemiosus exilis ( LeConte, 1852 )

Short, Andrew Edward Z. & Torres, Phillip J., 2006, Review of the Hemiosus Sharp and Derallus Sharp of North America, Central America, and the Caribbean (Coleoptera: Hydrophilidae: Berosini), Zootaxa 1369, pp. 1-17 : 8-9

publication ID

https://doi.org/ 10.5281/zenodo.174866

publication LSID

lsid:zoobank.org:pub:7675CC72-B6D3-4EF6-B2EB-FE37BD42CEC1

persistent identifier

https://treatment.plazi.org/id/8D7A87A6-FFE7-FFA5-1F50-B8B2AFB2824C

treatment provided by

Plazi

scientific name

Hemiosus exilis ( LeConte, 1852 )
status

 

Hemiosus exilis ( LeConte, 1852)

( Fig. 4 View FIGURES 3 – 5 )

Berosus exilis LeConte, 1852: 211 .

Hemiosus toxillus d’Orchymont, 1940: 181 . New synonomy. Hemiosus exilis: Leech, 1943: 61 ; Van Tassell, 1964: 54.

Type material examined. Berosus exilis LeConte : Holotype (male): [colored disc], “ B. exilis / Lec./ Gila”, “ Type / 3081 ” ( MCZ).

Hemiosus toxillus d’Orchymont : holotype (male): “[male symbol]”, “Mex. Mazatlan/ brack, pools 25 / v. 1934 H. Hinton”, “A. d’Orchymont det./ Hemiosus / toxillus m.”, “ TYPE [red card]” ( IRSNB). Paratype: “Female symbol”, “Sinaloa/ Mex”, “Para-/ type [orange card]”, “ Hemiosus toxillus / Orchymont/ Tete Manque” ( IRSNB).

Additional material examined (69). MEXICO: Sinaloa: Culiacan, 16.vii. 1963, P.J. Spangler leg. (60: AEZS, NMW, USNM); Jalisco: Rio Cuitzmala, SE of Chamela, 180 ft. asl, 6.i. 2005, W.D. Shepard leg. (7: AEZS); 6.6 km SE Villa Purificacion, Puente El Amorin, 8.i. 2005, W.D. Shepard leg. (1: AEZS); Veracruz: 29 mi. SE Jalapa, 900 ft., 26.xii. 1963, M.J. Tauber & C.A. Tauber leg. (1: EMEC).

Diagnosis. Total length: 2.3–2.8 mm. The broadly testaceous anterior and lateral margins of the pronotum ( Fig. 4 View FIGURES 3 – 5 ) serve to distinguish this species in Mesoamerica.

Distribution. Mexico, United States (Arizona, Texas).

Remarks. See Van Tassell (1964) for a detailed discussion of the taxonomic history of the species. The synonymy of H. toxillus d’Orchymont with H. exilis (LeConte) was first recognized but unpublished by Van Tassell (1966). I have examined the holotypes of both species and concur that H. toxillus d’Orchymont and H. exilis (LeConte) are conspecific. This likely occurred because H. exilis was still placed in the genus Berosus when d’Orchymont (1940) described H. toxillus . A full description and additional illustrations of this species are given by Oliva (1991) under the name H. toxillus .

MCZ

Museum of Comparative Zoology

IRSNB

Institut Royal des Sciences Naturelles de Belgique

NMW

Naturhistorisches Museum, Wien

USNM

Smithsonian Institution, National Museum of Natural History

EMEC

Essig Museum of Entomology

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Hydrophilidae

Genus

Hemiosus

Loc

Hemiosus exilis ( LeConte, 1852 )

Short, Andrew Edward Z. & Torres, Phillip J. 2006
2006
Loc

Hemiosus toxillus d’Orchymont, 1940: 181

Van 1964: 54
Leech 1943: 61
1943
Loc

Berosus exilis

LeConte 1852: 211
1852
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