Hydrochus brianbrowni Makhan

Perkins, Philip D., 2021, Taxonomy of Central American water beetles in the genus Hydrochus Leach, 1817 (Coleoptera: Hydrochidae), Zootaxa 4974 (3), pp. 459-503: 473-474

publication ID

https://doi.org/10.11646/zootaxa.4974.3.2

publication LSID

lsid:zoobank.org:pub:1BD6220B-7540-4A12-B3D2-5EDC1A3B7DD8

DOI

http://doi.org/10.5281/zenodo.4777906

persistent identifier

http://treatment.plazi.org/id/4772526A-0044-FFC0-FF18-28DC108032FC

treatment provided by

Plazi

scientific name

Hydrochus brianbrowni Makhan
status

 

Hydrochus brianbrowni Makhan  

Figs. 2 View FIGURE 2 , 9 View FIGURES 9–10 , 31 View FIGURES 31–33

Hydrochus brianbrowni Makhan 2005: 63   .

Originally described from southern Arizona. New locality data records for Mexico are given below

Material examined (52): Mexico: Baja California, Arroyo Saltito nr. Las Cruces, E. of La Paz , 23.i.1959, leg. H. B. Leech (1 CAS)   ; Baja California Sur, 9 mi. up Canyon San Bernardo fr. Boca de la Sierra (Potrero), elev. 457 m (23°23’N, 109°57’W), 2.viii.1971, leg. H. G. Real & R. E. Main (1 FSCA, 37 CAS); GoogleMaps   Sa. Victoria , 7 mi. W Santiago, (23°28’N, 109°50’W), 30-31.x.1968, leg. E. L. Sleeper & F. J. Moore (1 CAS) GoogleMaps   ; Jalisco, Mpio. Tomatlán, Cajón de Peñas , 120 m, 15.vi.1994, G. Nogueira col. (1 IEXA)   ; Quintana Roo, Pto   . Morelos, 29.iv.1982, leg. O. Comul (1 UNAM)   ; San Luis Potosi, 2 mi. S. San Luis Potosi, 21.xi.1948, leg. H. B. Leech (1 CAS)   ; Sinaloa, Los Mochis , 8.vii.1922, leg. C.T. Dodds (1 CAS)   ; Sonora, 20 mi. W. Moctezuma , 28.ix.1980, leg. no collector on label (2 NMNH)   ; 7 mi. SE Alamos , 27.xi.1971, leg. K. Stephan (2 NMNH)   ; La Pintada , 6.xi.1986, leg. F. Arias (3 UNAM)   ; Zacatecas, Teul de Gonzalez Ortega, Huitzila ; borde arroyo, elev. 1718 m (21°36’46.1’’N, 103°36’22.2’’W), 31.i.2004, leg. V.Gomez & J.L. Navarrete-Heredia (1 NMNH) GoogleMaps   .

Differential diagnosis. Among Central American species, recognized by the combination of moderate size (ca. 2.94 mm), the deep pronotal depressions, and the male genitalia ( Fig. 9 View FIGURES 9–10 ; described below). This species has a generalized Hydrochus   habitus; reliable determinations will require dissection of males. The aedeagus is very narrow, for comparison refer to the diagnosis of H. nayaritensis   n. sp.

Male genitalia ( Fig. 9 View FIGURES 9–10 ). General characters: paramere tips slender and pointed, narrower in lateral view than in dorsal/ventral views, in dorsal/ventral views with medial margins at apex parallel or nearly so, then arcuate away from midline, slightly narrowed proximal to plsa; aedeagus in dorsal/ventral views very slender, parallel-sided or nearly so for entire length, apex pointed; in lateral view wider at base and slightly wider for remainder of length; lateral margins of aedeagus sclerotized; basal piece in dorsal/ventral views tapering from distal to proximal, in lateral view slightly wider proximally than distally, shorter than parameres, orifice strongly sclerotized.

Dorsal surface: pdmm widely separated, overlapping aedeagus only very slightly at base; adbl moderately large; adtl at about distal 1/6; each paramere with prominent pwsa; paramere tips without sclerotized ridge.

Ventral surface: pvmm well separated, except narrowly separated where overlapping aedeagus basally; avtl not apparent.

Remarks. I have examined the holotype, including the male genitalia (LANHM). The specimen imaged ( Fig. 9 View FIGURES 9–10 ) was collected at this locality: Baja California Sur, 9 mi. up Canyon San Bernardo fr. Boca de la Sierra (Potrero).

CAS

California Academy of Sciences

FSCA

Florida State Collection of Arthropods, The Museum of Entomology

UNAM

Universidad Nacional Autonoma de Mexico

NMNH

Smithsonian Institution, National Museum of Natural History

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Hydrochidae

Genus

Hydrochus

Loc

Hydrochus brianbrowni Makhan

Perkins, Philip D. 2021
2021
Loc

Hydrochus brianbrowni

Makhan, D. 2005: 63
2005