Chaetodactylus abditus; Chaetodactylus gibbosi; Chaetodactylus lithurgi (Acari: Chaetodactylidae)

Phoretic deutonymphs of the mite <i>Chaetodactylus abditus</i> on <i>Lithurgus_echinocacti</i> pollinating a barrel cactus (<i>Ferocactus</i>), Arizona

Fig. 1. Phoretic deutonymphs of the mite Chaetodactylus abditus on Lithurgus echinocacti pollinating a barrel cactus (Ferocactus), Arizona. Click here to enlarge Mite Chaetodactylus abditus (Chaetodactylidae)

Mite Chaetodactylus abditus (Chaetodactylidae)

Fig. 2. Chaetodactylus abditus Click here to enlarge Mite Chaetodactylus gibbosi (Chaetodactylidae)

Fig. 3. Chaetodactylus gibbosi Click here to enlarge

Bee Mites : Acari : Acariformes : Sarcoptiformes : Chaetodactylidae : Chaetodactylus

Chaetodactylus abditus Klimov and OConnor, 2004

Chaetodactylus abditus Klimov and OConnor, 2004: 175, Figs 5, 6; Klimov and OConnor, 2008: 124, Figs 60-61.

Material. Holotype: USA: Arizona, Pima Co., Continental, ex Lithurgus planifrons (ventral mesosoma), 8 Sep 1978, Knowlton & Hanson, USNM, BMOC 96-0510-012. Paratypes: 4 + 4 + 1 HDNs - same data as holotype (lateral mesosoma + ventral mesosoma + 1st metasomal tergite); 34 HDN'S - Pima Co., near Continental, elev. 1019 m., 10 am, 31°49.49'N 110°55.58'W, ex female of Lithurgus echinocacti (mostly pronotum) on Ferocactus (Caryophyllales: Cactaceae), 3 Sep 2003, P. Klimov, UMMZ, BMOC 03-0903-001; 5 HDN'S - MEXICO: Colima, Revillagigedo Arch., Socorro Is., ex male of L. planifrons (pronotum and posterior head), 1-5 May 1955, McDonald & Blodget, LACM, BMOC 03-0127-001; 3 HDN'S - same locality, Station 5, Elev. 900 ft. (274.3 m), ex female of L. planifrons (mesosoma, including propodeum), 8 Jun 1977, C. Hogue & A. Evans (Steele Exped.), LACM, BMOC 03-0127-002; 5 HDN'S - same data (metepisternum), LACM, BMOC 03-0127-003; 8 + 3 +15 HDNs - same locality, Bahia Braithwaite, ex L. planifrons (propodeum + mesepisternum + ventral mesosoma), 7 May 1925, H. H. Keifer, CAS, BMOC 03-0604-003. Holotype in USNM, paratypes in CAS, HNHM, IRSNB, LACM, UMMZ, UNAM, USNM.
Identification. See key. Click here for multivariate discrimination between 3 cryptic species. Known from phoretic deutonymphs only.
Hosts. Lithurgus (Lithurgopsis) planifrons (type host), Lithurgus (Lithurgopsis) echinocacti (Megachilidae).
Distribution (show map). USA: Arizona (type locality), Mexico: Socorro Island.

Chaetodactylus gibbosi Klimov and OConnor, 2004

Chaetodactylus gibbosi Klimov and OConnor, 2004: 178, Fig 7; Klimov and OConnor, 2008: 124, Fig. 62.

Material (USA: Florida). Holotype: HDN - Liberty Co., T 2 N R7W, ex Lithurgus gibbosus (pronotum), 3 May 1924, T. H. Hubbell, UMMZ, BMOC 02-1205-006. Paratypes: 3 + 6 HDNs - same data as holotype (pronotum + ventral metasoma); 3 HDNs - Florida, Alachua Co., Gainesville, ex L. gibbosus (pronotum/hind femur/metasoma), 20 May 1929, "V. K. B. #113", UMMZ, BMOC 02-1205-007; 10 HDNs - Highlands Co., Highlands Hammock State Park, ex Lithurgus sp. (propodeum), 4 Apr 1974, G. C. Eickwort, CUIC, BMOC 95-0422-103; 14 HDNs - Highlands Co., Archbold Biological Station, ex Lithurgus sp. (metepisternum, posterior coxae III), 20 Apr 1969, L. L. Pechuman, CUIC, BMOC 95-0422-107; 5 + 11 + 20 HDNs - Miami-Dade Co., Coral Gables, ex L. gibbosus (propodeum + 1st metasomal tergite + pronotum), "19", no collector, USNM, BMOC 96-0510-010 UMMZ. Holotype in UMMZ, paratypes in CUIC, HNHM, IRSNB, FSCA, UMMZ, USNM.
Additional material. 15 HDNs - Georgia, Jefferson Co., Wadley, ex Lithurgus gibbosus on propodeum, 23 Apr 1938, F. E. Lutz, AMNH, BMOC 04-0508-149. Voucher specimens in AMNH, UMMZ, UNAM.
Identification. Known from phoretic deutonymphs only. Similar to Ch. abditus and Ch. lithurgi. Differs from these two species by ratio length of prodorsal shield/length of seta d₁ (See key). Click here for multivariate discrimination.
Hosts. Lithurgus (Lithurgopsis) gibbosus (Megachilidae).
Distribution (show map). USA: Florida (type locality), Georgia.

Chaetodactylus lithurgi Klimov and OConnor, 2004

Chaetodactylus lithurgi Klimov and OConnor, 2004: 173; Klimov and OConnor, 2008: 121.

Material (USA). Holotype: HDN - New Mexico, Colfax Co., Cimarron Canyon, ex Lithurgus apicalis (propodeum/metepisternum), 12 Jun 1956, R. & K. Dreisbach, MSU, BMOC 95-0323-021. Paratypes: 14 + 5 + 5 + 4 HDN (propodeum/metepisternum + propodeum + wingbase + hindleg), other data as for holotype; 3+1 HDNs - same data (propodeum+pronotum), MSU, BMOC 95-0323-020; 2 + 1 HDNs - Cibola Co., El Malpais National Monument, North Pasture, T7N R10W S30 NOPA, ex L. apicalis (pronotum + 1st metasomal tergite), 26 Aug 1991, D.C. Lightfoot, USNM, BMOC 96-0510-008; 1 HDN - Arizona, Pima Co., Tucson, ex L. apicalis (1st metasomal tergite), on Opuntia (Caryophyllales: Cactaceae), 28 May 1953, G. D. Butler, USNM, BMOC 96-0510-007; 15 HDN'S - Santa Cruz Co., Santa Rita Mountains, ex L. apicalis (propodeum), 5 Sep 1937, W. Benedict, KU, BMOC 96-0916-191; 3 + 1 HDNs - Colorado, Fremont Co., Cañon City, ex L. apicalis (1st metasomal tergite/propodeum/midfemur + pronotum), 3 Jul 1949, L. D. Beamer, KU, BMOC 96-0916-192; 14 HDN'S - Idaho, Fremont Co., St. Anthony Sand Dunes, ex L. apicalis (ventral metasoma), 29 Jun 1977, W.F. Barr, USNM, BMOC 96-0510-009; 7 + 5 HDN'S - Texas, Big Bend National Park, Oak Canyon, 1400-1520m., ex Lithurgus littoralis (between hind coxae + propodeum), on Prosopis juliflora (Sw.) DC. (Fabales: Fabaceae), 11 Apr 1986, T. Griswold, USNM, BMOC 96-0510-011; 6 + 5 HDNs - Lee Co., Giddings, ex Lithurgus gibbosus (forewing base + propodeum), on Opuntia, 10 May 1953, L.D. Beamer, KU, BMOC 96-0916-199; 5 HDN'S - same locality and host, on Opuntia (around wing bases), 12 May 1953, R. H. Beamer KU, BMOC 96-0916-200; 6 HDNs - Maverick Co., Quemado, ex L. littoralis (proboscidial fossa) on Opuntia, 11 Apr 1950, Michener, Rozen, Beamer & Stephen, KU, BMOC 96-0916-204. Holotype in MSU, paratypes in IRSNB, KU, MSU, HNHM, UMMZ, USNM.
Additional material. 10 HDNs - Arizona, Cochise Co., Portal, ex Lithurgus apicalis on posterior mesosoma and 1st metasomal tergite, 6 Jun 1967, W. J. Gertsch, AMNH, BMOC 04-0508-145; 2HDNs - Pima Co., Continental, 31°50'32.3''N 110°57'17.1''W, elev. 936 m. Opuntia/cholla, ex Diadasia sp. wing base and middle trochanter, 19 May 2004, P. Klimov UMMZ BMOC 04-0524-012; 10HDNs - Pima Co., Continental, 31°50'32.3''N 110°57'17.1''W, elev. 936 m., Opuntia, ex L. apicalis on ventral mesosoma, 19 May 2004, P. Klimov, UMMZ BMOC 04-0524-013. Voucher specimens in OSAL, UMMZ, UNAM.
Identification. See key. Click here for multivariate discrimination between 3 cryptic species. Known from phoretic deutonymphs only.
Hosts. Lithurgus (Lithurgopsis) apicalis (type host), Lithurgus (Lithurgopsis) littoralis, Lithurgus (Lithurgopsis) gibbosus (Megachilidae).
Distribution (show map). USA: Arizona, Colorado, Idaho, New Mexico (type locality), Texas.

References
Klimov, P. B. & B. M. Oconnor. 2004. Multivariate discrimination among cryptic species of the mite genus Chaetodactylus (Acari: Chaetodactylidae) associated with bees of the genus Lithurgus (Hymenoptera: Megachilidae) in North America. Experimental and Applied Acarology. 33: 157-182.
Klimov, P. B. & B. M. OConnor. 2008. Morphology, Evolution, and Host Associations of Bee-Associated Mites of the Family Chaetodactylidae (Acari: Astigmata), with a monographic revision of North American taxa. Miscellaneous Publications Museum of Zoology University of Michigan. 199: 243.