Rhectomia Moure, 1947

ENGEL, MICHAEL S., 2000, Classification Of The Bee Tribe Augochlorini (Hymenoptera: Halictidae), Bulletin of the American Museum of Natural History 2000 (250), pp. 1-89 : 54-55

publication ID

https://doi.org/ 10.1206/0003-0090(2000)250<0001:COTBTA>2.0.CO;2

persistent identifier

https://treatment.plazi.org/id/962C87CA-AB68-FFE7-FD36-64D498A55A24

treatment provided by

Felipe

scientific name

Rhectomia Moure
status

 

Genus Rhectomia Moure View in CoL

Rhectomia Moure, 1947: 9 . Type species: Rhectomia pumilla Moure, 1947 , monobasic and original designation.

Corynurella Eickwort, 1969a: 398 . Type species: Corynurella mourei Eickwort, 1969a , monobasic and original designation.

DIAGNOSIS: Rhectomia is most closely related to Rhinocorynura . The genus differs from Rhinocorynura by a broadly rounded mesoscutal anterior margin, a rounded mesoscutal lip, and the absence of clypeal armature and the anterior basitarsal brush.

DESCRIPTION: Female. Mandible with weak subapical tooth. Labral distal process narrowly triangular; basal elevation bilobed or orbicular; teeth absent. Prementum not greatly elongate. Galeal apex rounded; galeal comb present; galeal base extending only halfway to stipital base. Hypostomal ridge carinate; anterior angle rounded. Length of malar space less than basal mandibular width. Epistomal sulcus obtuse. Ocelli not greatly enlarged; ocellar furrow absent. Vertex expanded behind ocelli. Preoccipital ridge rounded. Pronotal lateral angle produced, orthogonal to obtuse; dorsal ridge carinate, usually with medial interruption separating dorsal ridge into anterior and posterior halves on different planes; lateral ridge angled or carinate. Mesoscutal anterior border rounded; mesoscutal lip rounded. Tegula oval. Anterior basitarsal brush absent. Basitibial plate bordered on all sides. Inner hind tibial spur pectinate. Apex of marginal cell acute. Distal hamuli with irregular spacing pattern. Basal area of propodeum smooth or very finely striate; propodeal pit narrow. Male. Mandible simple. Labrum without distal process; basal area not notched. Antenna extending back to scutellum; F2 roughly equal to F1. Inner hind tibial spur serrate. Metasoma elongate. S4 unmodified. Apical margins of S5 and S6 emarginate. Apical margin of S7 unmodified. Apical margin of S8 unmodified; spiculum narrow. Proctiger with microtrichial fringe. Gonobasal bridge broad; dorsal lobes strong. Basal process of gonostylus present; parapenial lobe absent. Ventral surface of penis valve unmodified.

REVISIONS: The genus was recently treated by Engel (1995b) who recognized four spe- cies and presented a key for their identification.

BIOLOGY: Nothing is known of Rhectomia biology, although the head size polymorphism present in at least one species ( R. harrisoni Engel ) suggests the possibility of social behavior.

DISTRIBUTION: Species of Rhectomia occur in northern Argentina, southern Brazil, Bolivia, Paraguay, and southern Peru.

Genus Rhinocorynura Schrottky Figures 2 View Figs , 18 View Figs , 31, 33 View Figs , 35 View Figs , 74–75 View Figs

Corynura (Corynuropsis) Cockerell, 1901: 220 . Type species: Corynura (Corynuropsis) darwini Cockerell, 1901 [= Augochlora briseis Smith, 1879 ], original designation. Nomen praeoccupatum (nec Corynuropsis Scott, 1894 [Crustacea: Entomostraca]).

Rhinocorynura Schrottky, 1909a: 147 . Type species: Halictus ( Corynura vel Corynuropsis) inflaticeps Ducke, 1907 , monobasic and original designation.

Ctenocorynura Schrottky, 1914: 628 . Type species: Ctenocorynura vernoniae Schrottky, 1914 [= Halictus ( Corynura vel Corynuropsis) inflaticeps Ducke, 1907 ], monobasic and original designation.

Corynuroides Sandhouse, 1943: 540 . Nomen novum pro Corynuropsis Cockerell, 1901. Type species: autobasic with Corynuropsis Cockerell, 1901.

Rhynocorynura Sakagami and Moure, 1965: 303. Nomen emendatum (unjustified).

DIAGNOSIS: Refer to Diagnosis for Rhectomia .

DESCRIPTION: Female. Mandible with strong subapical tooth. Labral distal process broadly triangular; basal elevation bilobed; teeth absent. Prementum not greatly elongate. Galeal apex rounded; galeal comb present; galeal base extending only halfway to stipital base. Hypostomal ridge carinate or weakly lamellate; anterior angle rounded. Length of malar space less than basal mandibular width. Clypeus frequently with armature of some design. Epistomal sulcus obtuse. Ocelli not greatly enlarged; ocellar furrow absent. Vertex expanded behind ocelli. Preoccipital ridge rounded (except one species is carinate). Pronotal lateral angle produced, orthogonal to obtuse; dorsal ridge lamellate; lateral ridge angled. Mesoscutal anterior border narrowed; mesoscutal lip la- mellate. Tegula oval. Anterior basitarsal brush present. Basitibial plate bordered on all sides. Inner hind tibial spur pectinate. Apex of marginal cell acute. Distal hamuli with irregular spacing pattern. Basal area of propodeum smooth. Male. Mandible simple. Labrum with distal process; basal area not notched. Antenna extending back to scutellum; F2 approximately equal in length to F1. Inner hind tibial spur serrate. Metasoma elongate. Apical margins of S4 and S5 unmodified. Apical margin of S6 emarginate. Apical margin of S7 with median projection. Apical margin of S8 unmodified; spiculum narrow. Proctiger with microtrichial fringe. Gonobasal bridge broad; dorsal lobes weak. Basal process of gonostylus present; parapenial lobe present or absent. Ventral surface of penis

valve with keel.

REVISIONS: There has been no revision of the genus, which currently includes five described species.

BIOLOGY: The nesting biology of one species, R. inflaticeps (Ducke) , was investigated by Eickwort and Sakagami (1979).

DISTRIBUTION: Species of Rhinocorynura occur in northern Argentina, southern Brazil, Bolivia, southern Ecuador, Paraguay, and Peru.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Hymenoptera

Family

Halictidae

Loc

Rhectomia Moure

ENGEL, MICHAEL S. 2000
2000
Loc

Corynuroides

Sandhouse 1943: 540
1943
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