Osmia (Diceratosmia) marilaunidii Cockerell, 2017

Rightmyer, Molly G., 2017, A revision of the subgenus Osmia (Diceratosmia), with descriptions of four new species (Hymenoptera, Megachilidae), Zootaxa 4337 (1), pp. 1-37 : 17-18

publication ID

https://doi.org/ 10.11646/zootaxa.4337.1.1

publication LSID

lsid:zoobank.org:pub:39A92904-0378-4B5D-AE6F-704E5B38A59C

DOI

https://doi.org/10.5281/zenodo.6025537

persistent identifier

https://treatment.plazi.org/id/0389EE11-C13B-FFE7-2E85-4FE718C89A29

treatment provided by

Plazi

scientific name

Osmia (Diceratosmia) marilaunidii Cockerell
status

stat. nov.

Osmia (Diceratosmia) marilaunidii Cockerell View in CoL , new status

( Figs 1A View FIGURE 1 , 2A View FIGURE 2 , 7A View FIGURE 7 , 12B View FIGURE 12 )

Osmia conjuncta marilaunidii Cockerell 1914: 363 View in CoL [Holotype male: Washington, D.C.]; Sandhouse 1939: 140 [synonymy with O. subfasciata View in CoL and O. botitena View in CoL ]; Michener 1949: 261 [rejection of synonymy with O. subfasciata View in CoL , agreement of synonymy with O. botitena View in CoL ].

Diagnosis. Like most Diceratosmia , females and males of O. marilaunidii are relatively small (intertegular distance ca. 2 mm in females, 1.8 mm in males) and have metallic blue integument. Osmia marilaunidii females can be distinguished from all other small, blue Diceratosmia except O. conjuncta by the combination of the following characters: the lack of modified hairs on the face (hairs long and tapering, not short and stout or corkscrew shaped) and scopa (hairs tapering, not swollen or blunted at apical tips), and lack of a carinate omaulus (i.e., lateral and anterior surfaces of the mesepisternum joined by smoothly rounded curve). Osmia marilaunidii can be separated from O. conjuncta by subtle but consistent features of the mandible and T1: in O. marilaunidii , the carina at the base of the third tooth (forming the adjacent apical margins of the second and fourth teeth) forms a semi-half circle, while in O. conjuncta this carina is nearly straight to forming at most one-fourth of a circle; the anterior surface of T1 is polished and shiny in O. marilaunidii , while in O. conjuncta the anterior surface is shagreened and dull.

Males of O. marilaunidii can be distinguished from all other small, blue/green Diceratosmia except O. conjuncta and O. gonzalezi by the combination of the following characters: the apical margin of S3 is strongly emarginate; the lateral projections of T6 each form an acute angle similar to the submedian tooth found on the apical margin of T7; and S4 has hairs at its midpoint that are long and slender, and which do not form a dense comb (males of the larger, blue-greenish O. exquisita are unknown). Osmia marilaunidii and O. conjuncta differ from O. gonzalezi by the sculpturing of the frons between the punctures (shiny and polished in O. marilaunidii and O. conjuncta ; dull and granulose in O. gonzalezi ), as well as the presence of a large, hairless area on each side of the apical margin of S 4 in O. marilaunidii and O. conjuncta (i.e., with these hairless areas distinctly separating the hairs at the middle of the apical margin from the hairs found at the extreme sides of the apical margin; hairs continuous across apical margin in O. gonzalezi ). Osmia marilaunidii and O. conjuncta can be separated by differences in integument sculpture on the scape and T1, and punctation patterns on the metepisternum and S4: in O. marilaunidii the integument is shiny on the scape and anterior surface of T1 (dull in O. conjuncta ); the metepisternum is much less densely punctate than the center of the lateral surface of the mesepisternum (density of punctures subequal between these two areas in O. conjuncta ); and the subapical margin of S4 has a large impunctate area on either side of the median area bearing long hairs (these lateral impunctate areas lacking or much reduced in O. conjuncta ).

Distribution. Texas, USA and adjacent Mexico (Nuevo Leon) ( Fig. 16 View FIGURE 16 ).

Floral Associations. Asteraceae : Gaillardia suavis ; Boraginaceae : Phacelia ; Cactaceae : Opuntia phaeacantha ; Fabaceae : Lupinus texensis , Prosopis laevigata , Vicia ludoviciana ; Lamiaceae : Brazoria truncata , Salvia texana ; Malvaceae : Sphaeralcea pedatifida ; Onagraceae : Calylophus serrulatus .

Material Examined. Mexico. Nuevo Leon: Linares , 4 km S, 22 Mar 1991, R Brooks; Nuevo Laredo, 15 mi S, 22 Feb 1972, FD Parker, DR Miller; Sabinas, 15 mi S Hidalgo , 23 Feb 1972, FD Parker, DR Miller. Tamaulipas: Rio Corona , 18 mi N Ciudad Victoria , 13 Apr 1979, G Valle . USA. Texas: Bexar Co, Salado Creek, 1 Apr 1957, BF Eldridge; Bexar Co, Salado Creek , 1 Apr 1957, J Kesser; Brazos Co, 9 Apr 1963 AH Alex; Cameron Co, Santa Maria, 28 Mar 1951, RH Beamer; Denton Co, Rainbow Valley Agricutural CoOp, 27 Apr 2002, H Ikerd; Dimmit Co, Chaparral Wildlife Management Area , 15 Mar 1977, TP Friedlander; Ellis Co, Avalon, 25 Jun 1988, JG Rozen; Gillespie Co, Kerrville, 10 mi N, 22 Apr 1953, RH Beamer; Hidalgo Co, Bentsen Rio Grande Valley State Park, 25 May 1972, CC Porter; Hidalgo Co, Bentsen Rio Grande Valley State Park , 15 Mar 1979, C Porter; Hidalgo Co, Bentsen Rio Grande Valley State Park , 15 Mar 1983, C Porter; Hidalgo Co, McAllen Botanical Garden at McAllen , 24 Mar 1984, C. Porter ; Hidalgo Co, McAllen Botanical Garden at McAllen , 19 Mar 1983, C. Porter ; Hidalgo Co, McAllen Botanical Garden at McAllen , 20 Mar 1976, C. Porter ; Hidalgo Co, McAllen Botanical Garden at McAllen , 20 Mar 1983, C. Porter ; Hidalgo Co, McAllen Botanical Garden at McAllen , 26 Mar 1978, C. Porter ; Hidalgo Co, McAllen Botanical Garden at McAllen , 19 May 1983, C. Porter; Kerr Co, Kerrville, 22 Apr 1953, LD Beamer; Kerr Co, Kerrville, 23 Apr 1953, LD Beamer; Lee Co, Fedor, Birkman; Lee Co, Giddinas, 12 May 1953, RH Beamer; Maverick Co, Eagle Pass, 28 Mar 1946, CD Michener; Menard Co, Menard, 14 mi S, 2 Jun 1975, CD Michener; Refugio Co, Tivoli, 5 mi SW, 18 Apr 1952, Michener, Beamers; Stonewall Co, 16 Apr 1953, LD Beamer; Travis Co, Austin, 2 May 1980, PD Hurd; Austin, Brackenridge Field Lab, 13 Mar 1975, GJ Steck; Zapata Co, San Ygnacio, 15 Apr 1952, Michener, Beamers; Zavala Co, Crystal City, 14 Apr 1952, Michener, Beamers.

Comments. Osmia marilaunidii has been viewed incorrectly as a synonym of O. botitena which is here synonymized with O. subfasciata (See comments under O. subfasciata ). This species nests in snail shells ( Cane et al. 2007 as O. botitena ).

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Hymenoptera

Family

Megachilidae

Genus

Osmia

Loc

Osmia (Diceratosmia) marilaunidii Cockerell

Rightmyer, Molly G. 2017
2017
Loc

Osmia conjuncta marilaunidii

Michener 1949: 261
Sandhouse 1939: 140
Cockerell 1914: 363
1914
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