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Tetraloniella ayala LaBerge, 2001
Life   Insecta   Hymenoptera   Apoidea   Apidae   Tetraloniella
Subgenus: Tetraloniella


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Overview
Tetraloniella ayala, new species

This species is another moderate-sized species from central México that has relatively narrow but complete apical pale fasciae similar to those of T. silacea LaBerge. It has been named in honor of Dr. Ricardo Ayala who contributed a great deal to the successful completion of the collection trips throughout México sponsored by the National Science Foundation grant (BSR 90-24723). As in silacea, the female has the apical pale band of tergum 2 medially no longer than one-fourth to one-fifth median length of tergum, but differs by terga 2–4 having abundant short dark brown hairs in interband zones and in basal depressed area, Also terga 4 and 5 have the vestiture almost entirely dark brown, whereas in silacea this vestiture is ochraceous or golden in color. The male of alaya is similar to silacea in the short metasomal apical pale fasciae relatively long first flagellar segments, but differs in having flagellar segments 2–11 red to orange on outerlower surfaces and segment 2 is not quite as long as in silacea.

FEMALE. Measurements and Ratios.- N = 20; length, 11–13 mm; width, 4.0–4.5 mm; wing length, M = 2.93±0.104 mm; hooks in hamulus, M = 11.50±0.185; flagellar segment 1/2, M = 1.84±0.026.

Integumental Color.- Black except as follows: flagellar segments 3 or 4–10 more or less reddened on outer-lower surfaces; tegula piceous anteriorly, large posterior area hyaline, yellow; wing membranes hyaline, moderately infumate, veins black to dark brown; metasomal terga with apical areas translucent only in narrow apical rims; sterna 2–5 with apical areas hyaline, yellow; distitarsi dark brown; tibial spurs testaceous to ferruginous.

Structure.- Clypeus sculptured as in silacea but surface dull, shagreened. Supraclypeal area as in silacea but surface dull, finely tessellate. Face above antennal fossae, vertex lateral areas and genal area as in silacea but dull to moderately dull, shagreened. Galeae shiny above, unshagreened; maxillary palpus 5-segmented, ratio about as 1.0:0.9:0.9:0.4:0.3. Flagellar segments 2 and 10 as in silacea. Mesoscutum punctured as in silacea but posteromedial area with punctures separated largely by half to one puncture width, occasionally slightly sparser, surface dulled by distinct shagreening. Scutellum as in silacea but less shiny, usually moderately shagreened. Propodeum and mesepisternum sculptured as in silacea. Metasomal tergum 1 with apical area short, impunctate, basal area with apical third sparsely punctate except at extreme sides punctures more crowded than mediobasally, surface moderately dull, finely shagreened. Tergum 2–4 sculptured as in silacea. Pygidial plate as in silacea. Sterna 2–5 sculptured as in silacea.

Vestiture.- Generally ochraceous to pale ochraceous except as follows: vertex and dorsum of thorax with strongly ferrugineus vestiture, this deep rust color almost becomes brown in some specimens, without dark brown patches on mesoscutum or scutellum; tergum 2 with basal tomentum pale ochraceous; terga 3 and 4 with basal tomentum entirely or mostly dark brown, terga 2–4 with interband zones with short, erect, dark brown hairs; terga 5 and 6 with vestiture brown; sterna 2–5 with long plumose hairs ochraceous to almost golden in color, not white laterally; scopal hairs highly plumose, ochraceous.

MALE. Measurements and Ratios.- N = 13; length, 10–12 mm; width, 3.0–3.5 mm; wing length, 2.95±0.174 mm; hooks in hamulus, M = 10.4±0.183; flagellar segment 2/1, M = 3.79±0.104.

Integumental Color.- Black except as follows: clypeus entirely yellow; labrum white; mandible usually with small basal yellow macula, occasionally absent; tegulae and wings as in female; flagellar segments 2–11 with outer-lower surface red to yellow; metasomal terga as in female but apical areas with translucent rim usually slightly broader; sterna as in female; distitarsi reddish brown; tibial spurs testaceous.

Integumental Color.- Black except as follows: clypeus entirely yellow; labrum white; mandible usually with small basal yellow macula, occasionally absent; tegulae and wings as in female; flagellar segments 2–11 with outer-lower surface red to yellow; metasomal terga as in female but apical areas with translucent rim usually slightly broader; sterna as in female; distitarsi reddish brown; tibial spurs testaceous.

Terminalia (Figs. 30–34) similar to that of T. spissa (Figs. 10–14). Sternum 7 (Fig. 31) as in spissa but apicomedian plates smaller, a few hairs present and sternum 8 (Fig. 32) similar to spissa in having indented lateral margins but with only a few hairs apically. The gonocoxite (Figs. 33 and 34) is strongly elbowed as in spissa.

Vestiture.- Generally pale ochraceous except as follows: vertex with hairs usually golden; mesoscutum and scutellum with hairs golden to ferruginous (less rust-colored than female), never with dark brown hairs; terga 2–5 with apical pale bands complete, narrow (that of tergum 2 equals less than one-fourth median length of tergum), with interband zone hairs all short, erect, pale ochraceous; terga 6 and 7 with pale hairs; sternal hairs sparse, pale; inner surfaces hind basitarsi pale yellow.

Type Material.- The holotype female (UNAM), 23 female paratypes, and the allotype male of Tetraloniella ayala (UNAM) were collected 25 km. SW of Metzquititlán (1,860 m. elev.), Hidalgo, México, November 11, 1991, by Ricardo Ayala. Paratypes are in the collections of UNAM, INHS, USU, UCB, SECK, USNM. Data from an additional 13 female and 44 male paratypes, as well as the type material listed above, are listed below (see map, Fig. 3).

GUANAJUATO: San Gregorio (SW of Cueramero (1,700 km. elev.)—August 31, 1989, 2 miles, L. Godinez; September 17, 1989, 1 male, L. Godinez; October 6, 1989, 2 females, 4 males, L. Godinez. GUERRERO: Taxco (13 km. NE at 1,580 m. elev.)—1 female from yellow composite, October 29, 1991, R. Ayala. HIDALGO: Acayuca—l female, March 16, 1954, R.R. Dreisbach. Atotonilco el Grande (4 km. NW)—1 male from Eruca sativa, September 14, 1992, L. Godinez. Metzquititlán (25 km. SW at 1,860 m. elev.)—3 females, 1 male, November 11, 1991, T. Griswold; (22 km. SW at 1,750 m. elev.) 6 females from Simsia lagasceaformis, November 11, 1991, T. Griswold. Zimapán (3 mi. E at 6,200 ft. elev.)—6 males, September 28, 1975, J.A. Chemsak, J.A. Powell, T. Eichlin and T. Friedlander. JALISCO—1 male, September, 1965, N.L.H. Krauss. OAXACA: Nochistlán (7 mi. SE at 7,000 ft. elev.)—4 males, J.A. Powell, J.A. Chemsak, T. Eichlin and T. Friedlander. Miahuatlan (1,100 km. elev.)—1 male, September 6–10, 19??, R. Ayala. Yanhuitlán (3 mi. SE)—1 male, September 7, 1974, G.E. Bohart and W. Hanson. QUERETARO: Teloloapán—1 male (no abdomen), November 3–6, 1991, R. Ayala.


Identification
Extracted from Wallace E. LaBerge. 2001. Revision of the Bees of the Genus Tetraloniella in the New World (Hymenoptera: pidae)
This species is another moderate-sized species from central México that has relatively narrow but complete apical pale fasciae similar to those of T. silacea LaBerge. It has been named in honor of Dr. Ricardo Ayala who contributed a great deal to the successful completion of the collection trips throughout México sponsored by the National Science Foundation grant (BSR 90-24723). As in silacea, the female has the apical pale band of tergum 2 medially no longer than one-fourth to one-fifth median length of tergum, but differs by terga 2–4 having abundant short dark brown hairs in interband zones and in basal depressed area, Also terga 4 and 5 have the vestiture almost entirely dark brown, whereas in silacea this vestiture is ochraceous or golden in color. The male of alaya is similar to silacea in the short metasomal apical pale fasciae relatively long first flagellar segments, but differs in having flagellar segments 2–11 red to orange on outerlower surfaces and segment 2 is not quite as long as in silacea.
FEMALE. Measurements and Ratios.- N = 20; length, 11–13 mm; width, 4.0–4.5 mm; wing length, M = 2.93±0.104 mm; hooks in hamulus, M = 11.50±0.185; flagellar segment 1/2, M = 1.84±0.026.
Integumental Color.- Black except as follows: flagellar segments 3 or 4–10 more or less reddened on outer-lower surfaces; tegula piceous anteriorly, large posterior area hyaline, yellow; wing membranes hyaline, moderately infumate, veins black to dark brown; metasomal terga with apical areas translucent only in narrow apical rims; sterna 2–5 with apical areas hyaline, yellow; distitarsi dark brown; tibial spurs testaceous to ferruginous.
Structure.- Clypeus sculptured as in silacea but surface dull, shagreened. Supraclypeal area as in silacea but surface dull, finely tessellate. Face above antennal fossae, vertex lateral areas and genal area as in silacea but dull to moderately dull, shagreened. Galeae shiny above, unshagreened; maxillary palpus 5-segmented, ratio about as 1.0:0.9:0.9:0.4:0.3. Flagellar segments 2 and 10 as in silacea. Mesoscutum punctured as in silacea but posteromedial area with punctures separated largely by half to one puncture width, occasionally slightly sparser, surface dulled by distinct shagreening. Scutellum as in silacea but less shiny, usually moderately shagreened. Propodeum and mesepisternum sculptured as in silacea. Metasomal tergum 1 with apical area short, impunctate, basal area with apical third sparsely punctate except at extreme sides punctures more crowded than mediobasally, surface moderately dull, finely shagreened. Tergum 2–4 sculptured as in silacea. Pygidial plate as in silacea. Sterna 2–5 sculptured as in silacea.
Vestiture.- Generally ochraceous to pale ochraceous except as follows: vertex and dorsum of thorax with strongly ferrugineus vestiture, this deep rust color almost becomes brown in some specimens, without dark brown patches on mesoscutum or scutellum; tergum 2 with basal tomentum pale ochraceous; terga 3 and 4 with basal tomentum entirely or mostly dark brown, terga 2–4 with interband zones with short, erect, dark brown hairs; terga 5 and 6 with vestiture brown; sterna 2–5 with long plumose hairs ochraceous to almost golden in color, not white laterally; scopal hairs highly plumose, ochraceous.
MALE. Measurements and Ratios.- N = 13; length, 10–12 mm; width, 3.0–3.5 mm; wing length, 2.95±0.174 mm; hooks in hamulus, M = 10.4±0.183; flagellar segment 2/1, M = 3.79±0.104.
Integumental Color.- Black except as follows: clypeus entirely yellow; labrum white; mandible usually with small basal yellow macula, occasionally absent; tegulae and wings as in female; flagellar segments 2–11 with outer-lower surface red to yellow; metasomal terga as in female but apical areas with translucent rim usually slightly broader; sterna as in female; distitarsi reddish brown; tibial spurs testaceous.
Structure.- Sculpture of head as in female but genal area punctures slightly larger. Galea shiny above, unshagreened; maxillary palpus 5-segmented, ratio about as 1.0:0.7:0.9:0.4:0.4. Antennae relatively short but reaching second metasomal segment in repose; flagellar segment 1 with minimum length equal to one-third to slightly more than one-fourth maximum length of segment 2; penultimate segment about one-third as broad as long. Mesosoma as in female but mesoscutum with posteromedial area punctures somewhat sparser. Terga sculptured as in female but interband punctures sparser, separated often by almost two puncture widths. Pygidial plate with rounded apex and base almost twice as broad as apex. Sterna 2–5 as in female but with more sparsely punctate basal areas. Sternum 6 (Fig. 30) with apicolateral carinae following apicolateral margins of sternum, not toothed apically, ending abruptly at base. Terminalia (Figs. 30–34) similar to that of T. spissa (Figs. 10–14). Sternum 7 (Fig. 31) as in spissa but apicomedian plates smaller, a few hairs present and sternum 8 (Fig. 32) similar to spissa in having indented lateral margins but with only a few hairs apically. The gonocoxite (Figs. 33 and 34) is strongly elbowed as in spissa.
Vestiture.- Generally pale ochraceous except as follows: vertex with hairs usually golden; mesoscutum and scutellum with hairs golden to ferruginous (less rust-colored than female), never with dark brown hairs; terga 2–5 with apical pale bands complete, narrow (that of tergum 2 equals less than one-fourth median length of tergum), with interband zone hairs all short, erect, pale ochraceous; terga 6 and 7 with pale hairs; sternal hairs sparse, pale; inner surfaces hind basitarsi pale yellow.
Type Material.- The holotype female (UNAM), 23 female paratypes, and the allotype male of Tetraloniella ayala (UNAM) were collected 25 km. SW of Metzquititlán (1,860 m. elev.), Hidalgo, México, November 11, 1991, by Ricardo Ayala. Paratypes are in the collections of UNAM, INHS, USU, UCB, SECK, USNM. Data from an additional 13 female and 44 male paratypes, as well as the type material listed above, are listed below (see map, Fig. 3). GUANAJUATO: San Gregorio (SW of Cueramero (1,700 km. elev.)—August 31, 1989, 2 miles, L. Godinez; September 17, 1989, 1 male, L. Godinez; October 6, 1989, 2 females, 4 males, L. Godinez. GUERRERO: Taxco (13 km. NE at 1,580 m. elev.)—1 female from yellow composite, October 29, 1991, R. Ayala. HIDALGO: Acayuca—l female, March 16, 1954, R.R. Dreisbach. Atotonilco el Grande (4 km. NW)—1 male from Eruca sativa, September 14, 1992, L. Godinez. Metzquititlán (25 km. SW at 1,860 m. elev.)—3 females, 1 male, November 11, 1991, T. Griswold; (22 km. SW at 1,750 m. elev.) 6 females from Simsia lagasceaformis, November 11, 1991, T. Griswold. Zimapán (3 mi. E at 6,200 ft. elev.)—6 males, September 28, 1975, J.A. Chemsak, J.A. Powell, T. Eichlin and T. Friedlander. JALISCO—1 male, September, 1965, N.L.H. Krauss. OAXACA: Nochistlán (7 mi. SE at 7,000 ft. elev.)—4 males, J.A. Powell, J.A. Chemsak, T. Eichlin and T. Friedlander. Miahuatlan (1,100 km. elev.)—1 male, September 6–10, 19??, R. Ayala. Yanhuitlán (3 mi. SE)—1 male, September 7, 1974, G.E. Bohart and W. Hanson. QUERETARO: Teloloapán—1 male (no abdomen), November 3–6, 1991, R. Ayala.

Names
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