Bee Mites :
Acari :
Acariformes :
Sarcoptiformes :
Chaetodactylidae
Genus Sennertia Oudemans, 1905
Pediculus (non Linnaeus): Scopoli, 1763: 381 (part.)
Trichodactylus (nom. preocc. Latreille, 1828 in Decapoda): Gervais, 1844: 266 (part.); Berlese, 1884b: 12 (synonymized with Homopus Koch, 1841 and Dermacarus Haller, 1880; only Trichodactylus xylocopae mentioned; part.); Berlese, 1885: XVIII; Canestrini & Berlese, 1885: 207; Murray, 1877: 251 (part); Mégnin, 1880: 146 (part.).
Trichotarsus Canestrini, 1888b: 7 (nom. n. pro Trichodactylus "Dugès" (=Trichodactyle Donnadieu, 1868); Donnadieu, 1868: 70 (also as Trichodactyle, French vernacular form of Trichodactylus Dufour, 1839), part.; Donnadieu (1868) recognized Trichodactylus Dufour, 1839 proposed for Trichodactylus osmiae; part.); Canestrini, 1888a: 394 (part.); Berlese, 1897: 105 (part., with genus Eutarsus Hessling, 1852 as junior synonym); Banks, 1902: 176 (part.); Berlese, 1898: fasc. 89, n. 12 (part); Canestrini & Kramer, 1899: 148 (part.); Tietze in Canestrini, 1899: 938 (part., also includes Scutacarus and Winterschmidtiidae gen.); Giard, 1900: 377 (part.); Oudemans, 1900: 115 (part); Oudemans, 1901: 82 (part.); Michael, 1903: 13 (part.); Oudemans, 1903a: 144 (part.); Oudemans, 1903b: 13 (part.); Oudemans, 1903c: 138; Trägårdh, 1904: 156; Trägårdh, 1907: 12; Vitzthum, 1912c: 231; Vitzthum, 1912d: 289 (part.); LeVeque, 1928: 1; LeVeque, 1930: 2.
Acarus (non Linnaeus): Perkins, 1899: 38 (part. also includes Dinogamasus and Winterschmidtiidae)
Trichotarsus group D Oudemans, 1903a: 147.
Sennertia Oudemans, 1905a: 21 (type species Pediculus cerambycinus Scopoli, 1763, by original designation); Oudemans, 1911a: 168; Vitzthum, 1919: 38; Vitzthum, 1922: 62; Vitzthum, 1929: 76; Womersley, 1941: 479; Vitzthum, 1933: 152; Vitzthum, 1941: 307; Vitzthum, 1943: 886; Baker & Wharton, 1952: 351; Türk & Türk, 1957: 210; Elbadry, 1971: 89; Fain, 1974a: 215; Sherbef & Duweini, 1980: 245; Lombert et al., 1987: 113; OConnor, 1993a: 345; Fain & Pauly, 2001: 131; Klimov et al., 2007a: 1369; Klimov et al., 2007b: 120; Klimov & OConnor, 2008: 145.
Chaetodactylus: Pugh, 1993: 373 (misidentification).
Hericia (non Robin): Oudemans, 1917: 345 (part.).
Sonnertia Delfinado & Baker, 1976: 87 (lapsus).
Sennertai Baker & Delfinado-Baker, 1983: 119 (lapsus).
Sinnertia Kumar & Kumar, 1996: 134 (lapsus).
Seneria Ramaraju & Mohanasundaram, 2001: 107 (lapsus).
Senertia Ramaraju & Mohanasundaram, 2001: 107 (lapsus).
Type species Pediculus cerambycinus Scopoli, 1763, by original designation.
Biology and host associations. Species of this genus are associated with xylocopine bees Ceratina and Xylocopa (Apidae). Sometimes monophyletic groups of mites occur on monophyletic groups of hosts, indicating their close biological relationships and possible codivergence. Host associations of major groups of Sennertia are recorded here.
The majority of Sennertia disperse as heteromorphic deutonymphs on adult bees, however the Sennertia vaga group does not form deutonymphs and disperses as feeding instars. Reproduction and feeding also probably occur during dispersal.
The interactions of Sennertia with their hosts remain largely unknown. There are conflicting accounts suggesting either negative or neutral effect of the mite presence. In the former case, the damage to developing bees was marginal and always substantially lesser than that of Chaetodactylus. Some species (Sennertia sayutara, Sennertia devincta) are phoretic inside special pouches (acarinaria) on the body of certain Ceratina, suggesting mutualistic relationships. Unfortunately, the biology of such species has not been studied. Several species, such as, Sennertia koptorthosomae, have special pouches filled with fungal spores (sporothecae) on the hysterosoma (Klimov & OConnor, 2008), suggesting that they may transfer fungi from one bee nest to another.
Distribution (Show map). Worldwide, except for Antarctica. In contrast to Chaetodactylus, there is a clear division between New and Old World lineages.
Description (unique character states only). Phoretic deutonymph. Gnathosomal solenidion present and setae on free palpi absent and free palpi absent. Prodorsal shield absent. Cupules im situated at level of bases of legs III.
Immobile deutonymph absent.
Adults. Cupules im dorsal (correlated with deutonymph).
Male. Main part of progenital sclerites lateral to genital capsule. Progenital sclerites not touching each other. Body of dorsal supporting sclerite, posterior to base of aedeagus absent.
Larva. Claparède's organs absent.
Major groups (subgenera and species-groups) of Senneria are listed here (with a key).
Species included. 75 species and 2 subspecies (click here for a list of species).
Artificial key to species of the genus Sennertia of the New World
Phoretic deutonymphs
| 1 | Setae c1 longer, nearly as long as se. Posterior apodeme IV absent (present in one species) | |
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- | Setae c1 microsetae, distinctly shorter than se. Posterior apodeme IV present | |
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2(1) | Hysterosomal shield triangle in outline, setae f2 on edge and opisthosomal gland openings and setae c1 outside hysterosomal shield. Supracoxal setae scx situated on small sclerite separate from dorsal part of apodeme I. Posterior apodeme IV not connected to anterior apodeme IV. Setae mG I-II filiform. Suckers ad3 enlarged, exceed central suckers (ad1+2). Conoids ps2 at transverse level of central suckers. Tarsal setae e and f I-II strongly asymmetrical, f about 2 times shorter and filiform, e longer and lanceolate. Caruncle I-III with 2 distinct transparent lobes. Setae pR I-II, sR III, wF IV, gT I-II, hT I-II, kT III, ra I-II, and wa I-II spiniform. Associated with Xylocopa. (Subgenus Spinosennertia) | |
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- | Hysterosomal shield not triangle in outlines, distinctly expanded beyond lateral gland opening and bases of setae c1 and f2. Supracoxal setae scx situated on dorsal extension of posterior apodeme I. Posterior apodeme IV connected to anterior apodeme IV. Setae mG I-II bifid at tips. Suckers ad3 not enlarged, smaller than central suckers (ad1+2). Conoids ps2 anterior to anterior transverse level of central suckers. Tarsal setae e and f I-II slightly asymmetrical. Caruncle I-III with 1 distinct, usually sclerotized lobe. Setae pR I-II, sR III, wF IV, gT I-II, hT I-II, kT III, ra I-II, and wa I-II filiform. Associated with Ceratina. (surinamensis-group) | |
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3(1) | Setae h3 shorter or nearly equal to legs IV. 1a, 3a, 4a attenuated. Argentina (type locality), Brazil, Costa Rica, Guatemala, Mexico, Nicaragua, Peru, Suriname. Genital capsules of males and oviducts of females of Xylocopa (Neoxylocopa): X. frontalis (type host), X. fimbriata, X. mexicanorum, X. nasica, and X. nautlana ... Sennertia argentina Vitzthum, 1941 |
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- | Setae h3 distinctly longer than legs IV. 1a, 3a, 4a slightly rounded at tips. Trinidad and Tobago (type locality), Brazil, Venezuela. Xylocopa frontalis (type host), X. fimbriata ... Sennertia donaldi F. Turk, 1948 |
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4(2) | Setae c3 nearly spiniform, situated on soft cuticle; 4b filiform. Transparent margin of anterior suckers (ad3) without rough sclerotization | |
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- | Setae c3 conoidal, situated on large triangle sclerite touching posterior apodemes II and anterior apodemes III; 4b conoidal. Transparent margin of anterior suckers (ad3) with rough sclerotization | |
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5(4) | 5-7 lines between setae se and si. Additional posterior sclerite of posterior apodeme IV absent. Gnathosomal solenidia distinctly shorter than half of setae vi. Ceratina sp. (type host), Ceratina eximia. Mexico (type locality), Costa Rica, Panama ... Sennertia sodalis Klimov and OConnor, 2008 |
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- | 10-14 lines between setae se and si. Additional posterior sclerite of posterior apodeme IV present. Gnathosomal solenidia exceeding half of setae vi | |
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6(5) | Setae c3 about 1.3 wider than si. Setae d2 usually reaching or slightly protruding transverse level of im. Posterior apodeme IV and its additional posterior sclerite not separated by transparent grove, latter porous. Ceratina eximia. Mexico: Quintana Roo (type locality), Belize ... Sennertia recondita Klimov and OConnor, 2008 |
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- | Setae c3 and si nearly of same width. Setae d2 not reaching transverse level of im. Posterior apodeme IV and its additional posterior sclerite separated by transparent grove, usually latter not porous. Ceratina (Calloceratina) chloris. Suriname (type locality), French Guiana, Panama ... Sennertia surinamensis Fain and Lukoschus, 1971 |
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7(4) | Maximal length of rough sclerotization on transparent margin of anterior suckers (ad3) distinctly shorter than two diameters of anterior suckers. Ceratina capitosa. Mexico ... Sennertia haustrifera Klimov and OConnor, 2008 |
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- | Maximal length of rough sclerotization on transparent margin of anterior suckers (ad3) as long as two diameters of anterior suckers. Ceratina sp. Guatemala.... Sennertia sp. |
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8(1) | Tarsal ventral setae w IV distinctly shorter than leg IV. Posterior apodeme IV absent. Setae 1a, 3a, 4b, c3, 4a, g, and wa I-II simple (Amsennertia s. str.) | |
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- | Tarsal ventral setae w IV long, distinctly longer than leg IV. Posterior apodeme IV present. Setae 1a, 3a, 4b conoidal; c3, 4a, and g inflated at bases. Setae wa I-II bifid. Ceratina. Neotropics. (devincta-group) | |
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9(8) | Striate pattern at posterior end of hysterosomal shield nearly uniformly parallel. Setae cp not reaching im and setae e2. Setae sR III not protruding femur III. Costa Rica. Ceratina laticeps ... Sennertia sayutara Klimov and OConnor, 2007 |
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- | Striate pattern at posterior end of hysterosomal shield not uniform, with two distinct areas. Setae cp protruding bases of e2. Setae sR III protruding femur III. Peru. Ceratina sp. ... Sennertia devincta Klimov and OConnor, 2007 |
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10(8) | Setae d1, e1, and h1 nearly uniform in length, microsetae, d1 and e1 distinctly shorter than respective 1/2 of distance between them. (-) Setae c1 situated on anterior margin of hysterosomal shield (frontalis-, loricata-groups) or anterior to it (americana-group). Opisthosomal gland openings on (frontalis-group) or outside hysterosomal shield (loricata-group, americana-group) | |
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- | Setae d1 and e1 distinctly longer than h1, at least one of them longer than 1/2 of distance between bases. Setae c1 anterior to hysterosomal shield. Opisthosomal gland openings outside hysterosomal shield | |
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11(10) | Setae mG II almost as long as leg II, distinctly longer than vF II. Tarsal setae ra I-II simple (ignota-group) | |
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- | Setae mG II distinctly shorter than leg II and setae vF II. Tarsal setae ra I-II bifid (faini- group) |
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12(11) | Seta wF IV reaching base of tarsus IV. On Xylocopa (Xylocopoides) californica, Xylocopa (Xylocopoides) cyanea, Xylocopa (Notoxylocopa) tabaniformis orpifex. USA: California, Arizona; Mexico ... Sennertia segnis Klimov and OConnor, 2008 |
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- | Setae wF IV at most reaching middle of tibia IV | |
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13(12) | Ratio tarsus IV/anterior suckers 1.2-2.1 (1.6±0.19, n=72); ratio tarsus IV/hT II 0.7-1.3 (0.9±0.11, n=72). On Xylocopa (Neoxylocopa) varipuncta and other species of subgenera Neoxylocopa, Xylocopoides, and Notoxylocopa. USA: Arizona, California, Texas; Mexico ... Sennertia lucrosa Klimov and OConnor, 2008 |
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- | Ratio tarsus IV/anterior suckers 2.1-2.6 (2.3±0.18, n=6); ratio tarsus IV/hT II 1.3-1.4 (1.4±0.07, n=6). Apis mellifera. Guatemala ... Sennertia faini Baker and Delfinado-Baker, 1983 |
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14(11) | Setae h3 less than 110, 82-95 (89±4, n=10). Posterior processes of anterior coxal apodemes IV not reaching level of anterior cuticular suckers rudiments. Mexico: Oaxaca. Xylocopa (Notoxylocopa) tabaniformis tabaniformis, Xylocopa t. azteca ... Sennertia hurdi Klimov and OConnor, 2008 |
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- | Setae h3 exceeding 110. Posterior processes of anterior coxal apodemes IV almost reaching level of anterior cuticular suckers rudiments (in normally mounted specimens) |
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15(14) | Setae 4a reaching transverse level of pores ih (not studied). Argentina. Xylocopa (Schonnherria) splendidula ... Sennertia longipilis Alzuet and Abrahamovich, 1987 |
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- | Setae 4a not reaching transverse level of pores ih |
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16(15) | Tarsal setae w about 2 times longer than s IV, 7-9. Lateral gland openings reduced, do not look like usual distinct transverse slit. Peru. Xylocopa (Xylocopsis) funesta ... Sennertia sp. |
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- | Tarsal setae w and s IV subequal, very short (3-5). Lateral gland openings with usual distinct transverse slit. Peru. Xylocopa sp. ... Sennertia ignota Delfinado and Baker, 1976 |
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17(10) | Setae c1 situated on anterior margin of hysterosomal shield | |
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- | Setae c1 anterior to hysterosomal shield (americana-group) | |
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18(17) | Setae wF distinctly protruding apex of tarsus IV. Setae d1 usually longer than 1/4 of distance between them. Xylocopa (Xylocopoides) virginica. USA ... Sennertia americana Delfinado and Baker, 1976 |
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- | Setae wF slightly protruding apex of tarsus IV. Setae d1 shorter or equal 1/4 of distance between them. Xylocopa (Schonnherria) splendidula (type host). Xylocopa (Neoxylocopa) mendozana. Argentina ... Sennertia splendidulae Alzuet and Abrahamovich, 1989 (=S. brevipilis Alzuet and Abrahamovich, 1987, nom. preocc.) |
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19(17) | Opisthosomal gland openings outside hysterosomal shield. Usual striate pattern of hysterosoma accompanied by sclerotization (loricata-group) | |
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- | Opisthosomal gland openings on hysterosomal shield. Striate pattern of hysterosoma without sclerotization (frontalis-group) | |
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20(19) | Setae 4b, g, and 4a without distinct subbasal dense layer. Setae wa I-II and s III filiform, not widened. Setae ra I-II blade-like. Xylocopa (Stenoxylocopa) artifex. Brazil, Argentina ... Sennertia sp. |
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- | At least some of 4b, g, and 4a with distinct subbasal dense layer. Setae s I-III distinctly widened or spiniform (-) Setae ra I-II blade-like or filiform | |
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21(20) | Setae wa I-II and s III filiform, slightly widened, s III with pointed tips. Xylocopa (Neoxylocopa) darwini (Ecuador: Galapagos Is.), Xylocopa (Neoxylocopa) bruesi (Peru) ... Sennertia sp. |
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- | Setae wa I-II and s III spiniform or almost spiniform, at least s III with blunt tips | |
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22(21) | Ventral hysterosoma distinctly and densely striated. Setae ra I-II blade-like. Xylocopa (Neoxylocopa) mordax (USA: Puerto Rico, Virgin Islands of the United States, British Virgin Islands), Xylocopa (Neoxylocopa) cubaecola (Cuba), Xylocopa sp. (Bahamas) ... Sennertia pirata Klimov and OConnor, 2008 |
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- | Ventral hysterosoma smooth. Setae ra I-II filiform. Continental North and South America ... Sennertia frontalis, Sennertia shimanukii, Sennertia augustii (see Klimov & OConnor, 2008) |
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23(19) | Sclerotization bands accompanying usual striate pattern wide, in area of d1 wider than space between them. Setae c1 shorter than distance between them. Xylocopa (Schonnherria) muscaria. Venezuela... Sennertia sp. |
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- | Sclerotization bands accompanying usual striate pattern narrow, in area of d1 narrower than space between them. Setae c1 usually longer than distance between them | |
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24(23) | wF IV not protruding or slightly protruding apex of tarsus IV. Setae c1 almost reaching level of d1. Xylocopa (Schonnherria) viridis. Guyana ... Sennertia sp. |
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- | wF IV distinctly protruding apex of tarsus IV. Setae c1 not reaching level of d1. Mainly on Xylocopa (Schonnherria) micans, Xylocopa (Schonnherria) barbatella barbatella, Xylocopa (Schonnherria) muscaria. USA: Florida, Louisiana, Puerto Rico, Texas, Virginia; Mexico ... Sennertia loricata Klimov and OConnor, 2008 |
Adults*
| 1 | Idiosoma without mammillae. Supracoxal seta situated outside supracoxal sclerite; lateral to its outer ridge. Coxal fields III closed. Opisthosomal gland openings distinctly anterior to setae e2. (Neotropics, phoretic as adults on Xylocopa and Centris, heteromorphic deutonymphs probably absent vaga-group, new). Proximal acetabular extensions of ap' III partially border antiaxial margins of coxal fields III. Proximal acetabular extensions of ap' IV partially border antiaxial margins of coxal fields IV. Tarsal setae ra and la II absent. Solenidion ω2 I intermediate between subapical and submedial. Famulus (ε) lanceolate. Setae ba I as long as famulus (ε) or shorter. Female: Pseudanal seta ps3 posterior to 4a level. Male: Genital setae slightly (about on their diameter at base) anterior to progenital fold. Setae p II present. Xylocopa (Notoxylocopa) tabaniformis orpifex, Xylocopa (Notoxylocopa) tabaniformis androleuca, Xylocopa (Xylocopoides) californica. USA: Arizona, California; Mexico ... Sennertia vaga Klimov and OConnor, 2008
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- | Idiosoma with mammillae. Supracoxal seta situated on supracoxal sclerite; anterior to its outer ridge. Coxal fields III opened. Opisthosomal gland openings approximately at level of e2 or distinctly posterior to e2 (S. splendidulae). Proximal acetabular extensions of ap' III completely border antiaxial margins of coxal fields III. Proximal acetabular extensions of ap' IV completely border antiaxial margins of coxal fields IV. Tarsal setae ra and la II present. Solenidion ω2 I subapical. Famulus (ε) spiniform or almost cylindrical (**). Setae ba I longer than famulus ε (**). Female: Pseudanal seta ps3 anterior to 4a level. External copulatory tube absent. Male: Genital setae situated on progenital folds. Setae p II absent (**). Worldwide. Usually in nests of Xylocopa and Ceratina, heteromorphic deutonymphs present | |
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2(1) | Prodorsal shield length/width 1.4. (-) Dorsal idiosomal cuticle striate, striae with small tubercles. Microtuberculate pattern absent. Dorsal idiosomal setae c1-h1 filiform and long, reaching at least half of distance to next posterior pair of setae. Dorsal idiosomal setae cp, c3, h3 narrowing distally, not compressed dorso-ventrally, usually evenly barbed. Dorsal setae e2 and f2 filiform. Dorsal setae e2 and f2 nearly as long as h3. Prodorsal shield without falsifoveate pattern. Coxal fields III opened. Distal acetabular extensions of ap' III and ap'' III separate or not developed. Distal acetabular extensions of ap' IV and ap'' IV separate. Opisthosomal gland openings approximately at level of e2. Female: Setae ps3 short, distinctly shorter than ps2. Setae h3 anterior to h2. Posterio-medial part of dorsal opisthosoma without distinct longitudinal linear pattern. Male: Setae ad1 absent. Genital setae and pseudanal setae ps3 filiform. Dorsal supporting sclerites short, as long as 2 diameters of aedeagus at base or shorter. Leg and some other characters unknown.... Sennertia augustii |
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- | Prodorsal shield distinctly elongated, length/width 1.7-2.4 | |
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3(1) | Dorsal idiosomal setae c1-h1 elongated, reaching at least half of distance to next posterior pair of setae. Dorsal idiosomal setae cp, c3, and h3 long, filiform, narrowing and not compressed distally, more or less evenly barbed. Male: Pseudanal setae ps3 on progenital sclerites. Setae q I absent. Pretarsal suckers IV distinctly smaller than those on tarsi I-III. (-) Alveoli of setae ve present. Dorsal idiosomal cuticle uniformly striate, striae with small tubercles. Dorsal setae e2 and f2 filiform. Dorsal setae e2 and f2 nearly as long as h3. Prodorsal shield without falsifoveate pattern. Coxal fields III opened. Distal acetabular extensions of ap' III and ap'' III separate or not developed. Distal acetabular extensions of ap' IV and ap'' IV separate or not developed. Opisthosomal gland openings approximately at level of e2. Famulus ε almost cylindrical. Setae ba II as long as famulus or shorter. Female: Setae ad1 absent. Setae ad2 absent. Setae ps3 long, nearly as long as ps2. Setae h3 anterior to h2. Posterio-medial part of dorsal opisthosoma without distinct longitudinal linear pattern. Male: Setae ad1 absent. Genital setae and pseudanal setae ps3 filiform. Dorsal supporting sclerites distinctly longer than 2 diameters of aedeagus at base. Protonymph. Tarsal setae e IV and f IV present ... Sennertia scutata |
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- | Dorsal idiosomal setae c1-h1 short (not reaching half of distance to next posterior pair of setae). Dorsal idiosomal setae cp, c3, h3 either short and spiniform or long and feather-like. Male: Pseudanal setae ps3 outside progenital sclerites. Setae q I present. Pretarsal suckers IV similar to those on tarsi I-III | |
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4(3) | Setae e2 and f2 feather-like, flattened, with distinct apical rachis and barbs. Famulus ε almost cylindrical (**). Distal acetabular extensions of ap' III and ap'' III separate (unknown for S. leei and S. splendidulae).Tarsal setae ba II present. Setae h3 anterior to h2 | |
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- | Setae e2 and f2 spiniform, scarcely barbed, if flattened then not feather-like. Distal acetabular extensions of ap' III and ap'' III fused. Famulus ε spiniform. Tarsal setae ba II absent. Setae h3 at level of h2 | |
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5(4) | Setae h3 distinctly longer than e2 and f2. Dorsal idiosomal setae cp, c3, h3 long (several times longer than c1-e1) and feather-like. Dorsal cuticle with tuberculate (mammillate). Prodorsal shield without large cuticular "windows". Female: setae ad1-ad2 absent. Setae ps3 short, distinctly shorter than ps2. Posterio-medial part of dorsal opisthosoma with distinct longitudinal linear pattern. Male: Genital setae short, transparent mammillae. Pseudanal setae ps3 spiniform. Dorsal supporting sclerites short, as long as 2 diameters of aedeagus at base. Aedeagus Fig. 10 B,C ... Sennertia americana |
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- | Setae h3 as long as e2 and f2. Dorsal idiosomal setae cp, c3, h3 short (less than 1 time longer than c1-e1) and spiniform. Dorsal cuticle with two distinct patterns, tuberculate (mammillate) and scarce microtuberculate. Prodorsal shield with large cuticular "windows". Female: setae ad1-ad2 present. Setae ps3 long, as long as ps2. Posterio-medial part of dorsal opisthosoma without longitudinal linear pattern. Male: Genital and pseudanal setae ps3 filiform. Dorsal supporting sclerites distinctly longer than 2 diameters of aedeagus at base. Aedeagus Fig. 10 E (-) Alveoli of setae ve absent. Coxal fields III opened. Distal acetabular extensions of ap' IV and ap'' IV separate or not developed. Opisthosomal gland openings approximately at level of e2. Setae ba II absent. Male: Setae ad1 absent ... Sennertia koptorthosomae |
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6(4) | Opisthosomal gland openings distinctly posterior to e2. Female: Setae ps3 short, distinctly shorter than ps2. (-) Dorsal idiosomal cuticle striate (striae may be with small tubercles). Dorsal cuticular pattern more or less uniform. Dorsal setae e2 and f2 distinctly shorter than h3. Prodorsal shield without falsifoveate pattern. Coxal fields III opened. Distal acetabular extensions of ap' IV and ap'' IV separate or not developed. Female: Posterio-medial part of dorsal opisthosoma without distinct longitudinal linear pattern. Male: Setae ad1 absent. Genital setae filiform. Pseudanal setae ps3 filiform. Dorsal supporting sclerites short, as long as 2 diameters of aedeagus at base or shorter. Leg and some other characters unknown ... Sennertia splendidulae |
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- | Opisthosomal gland openings approximately at level of e2. Female: Setae ps3 long, nearly as long as ps2 (-) Alveoli of setae ve absent. Dorsal idiosomal cuticle tuberculate or mammillate. Dorsal cuticular pattern more or less uniform. Dorsal setae e2 and f2 nearly as long as h3. Prodorsal shield without falsifoveate pattern. Coxal fields III opened. Setae ba II as long as famulus ε or shorter. Female: Posterio-medial part of dorsal opisthosoma without distinct longitudinal linear pattern. Male: Setae ad1 present. Genital setae filiform. Pseudanal setae ps3 filiform. Dorsal supporting sclerites short, as long as 2 diameters of aedeagus at base or shorter ... Sennertia leei |
* Because many adult Sennertia are poorly described, we give a descriptive key to species of the World with supplemental characters separated by the "(-)". Descriptions of North American taxa are given below and omitted here. The following inadequately described species are not included: S. bifilis (Canestrini, 1897), S. caffra Vitzthum, 1919, S. cantabrica Zachvatkin, 1941, S. cerambycina (Scopoli, 1763), S. flabellifera Oudemans, 1924, S. greeni (Oudemans, 1917), S. morstatti (Vitzthum, 1914), S. perturbans Vitzthum, 1919, S. roepkei Oudemans, 1924.
**unknown for S. augustii and S. splendidulae
References
Baker, E. W. & M. Delfinado-Baker. 1983. New mites (Sennertia: Chaetodactylidae) phoretic on honey bees (Apis mellifera L.) in Guatemala. International Journal of Acarology.9: 117-121.
Baker, E. W. & G. W. Wharton. 1952. An introduction to acarology. N.Y.: The Macmillan Co. 465 pp.
Banks, N. 1902. New genera and species of acarians. The Canadian Entomologist.34: 171-176.
Berlese, A. 1884. Note relative agli Acari, Myriopodi e Scorpioni italiani (Note al Fascicolo XIII e XIV). Fasc. I. . Padova: Premiata Tipografia Editrice F. Sachetto. 14 pp.
Berlese, A. 1885. Acari, Myriopoda et Scorpiones hucusque in Italia reperta. Fasc. 18, n. 1. Padova: Premiata Tipografia Francesco Sachetto. (no page numbers) pp.
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