Microlia silacea ( Erichson, 1839 )

Gusarov, Vladimir I., 2002, A revision of the genus Microlia Casey, 1910 (Coleoptera: Staphylinidae: Aleocharinae: Hoplandriini), Zootaxa 34, pp. 1-24 : 9-12

publication ID

https://doi.org/ 10.5281/zenodo.155781

DOI

https://doi.org/10.5281/zenodo.6277379

persistent identifier

https://treatment.plazi.org/id/C419FA02-FFB3-627C-CB19-A1BEB05DFB5A

treatment provided by

Plazi

scientific name

Microlia silacea ( Erichson, 1839 )
status

 

1. Microlia silacea ( Erichson, 1839) View in CoL ( Figs. 19­33)

Homalota silacea Erichson, 1839: 120 View in CoL .

Homalota silacea: Bland, 1865: 398 View in CoL .

Dolosota (Microlia) pernix Casey, 1910: 144 .

Homalota silacea: Leng, 1920: 115 View in CoL .

Homalota pernix: Leng, 1920: 115 (as synonym of H. silacea View in CoL ). Atheta silacea: Leng, 1920: 119 .

Atheta (Microdota) silacea: Fenyes, 1920: 187 .

Atheta (Microdota) pernix: Fenyes, 1920: 187 (as synonym of A. silacea ). Atheta (Microdota) silacea: Bernhauer & Scheerpeltz, 1926: 635 . Atheta (Microdota) pernix: Bernhauer & Scheerpeltz, 1926: 635 (as synonym of A. silacea ). Atheta (Microdota) silacea: Leng & Mutchler, 1927: 22 .

Atheta (Microdota) pernix: Leng & Mutchler, 1927: 22 (as synonym of A. silacea ). Atheta (Microdota) silacea: Moore & Legner, 1975: 374 . Atheta (Microdota) pernix: Moore & Legner, 1975: 374 (as synonym of A. silacea ). Acrotona (Microlia) silacea: Seevers, 1978: 257 .

Acrotona (Microlia) pernix: Seevers, 1978: 257 (as valid species).

Type material. Lectotype of H. silacea (here designated):, “5462”, “ silacea Er. Am. [ Amerika] spt. [Septentrionale] Zimm. [Zimmermann]” (green label), “ Type ” (red label)”, “Zool. Mus. Berlin” ( MNHUB); paralectotypes: (with head and prothorax missing), “Americ. sept. Zimmerm. Nr. 5462” (green label), “ silacea Er. Typ. ”, “ Type ” (red label), “Zool. Mus. Berlin”; 1 specimen (with the apex of abdomen missing), “Americ. sept. Zimmerm. Nr. 5462” (green label), “ Type ” (red label), “Zool. Mus. Berlin” (all in MNHUB). The purpose of the lectotype designation is to assure correct and consistent application of the name in the future.

Lectotype of D. pernix (here designated):, “Va” (with a dot under “a”) [ Norfolk], “ Microlia pernix Csy. ”, “Casey bequest 1925”, “ Type USNM 39192” (red label) ( NMNH). The purpose of the lectotype designation is to assure correct and consistent application of the name in the future.

Additional material: UNITED STATES: North Carolina:, 2, (Sherm.) without precise locality data ( FMNH).

Diagnosis: Microlia silacea can be distinguished from other species of Microlia by the shape of the aedeagus, particularly the apical process of median lobe ( Figs. 26­29 View FIGURES 26 ­ 33 ), by having female accessory sclerites ( Fig. 25 View FIGURES 21 ­ 25 ) and spermatheca forming two­three coils ( Fig. 32­33 View FIGURES 26 ­ 33 ).

Description: Length 1.8­1.9 mm. Head, elytra and abdominal segments 3­4 yellowish brown, pronotum, legs, antennal articles 1­7 and mouthparts brownish yellow, abdominal segments 5­7 and antennal articles 8­11 brown.

Head surface glossy, on disk with weak isodiametric microsculpture, puncturation fine, distance between punctures ½­1 time their diameter. Eyes 2­2.5 times as long as temples.

Pronotum strongly transverse, 1.3 times wider than head, width 0.43­0.46 mm, length 0.30­0.31mm, width to length ratio 1.5, surface glossy, with weak and poorly visible (at x70) transverse microsculpture; puncturation as on head or finer, distance between punctures 1­2 times their diameter. Elytra wider (0.56­0.59 mm) and longer (0. 41­0.43 mm, measured from humeral angle) than pronotum (pronotal length to elytral length ratio 0.71), 1.3 times wider than long, glossy, microsculpture and puncturation as on pronotum. Mesotarsus with 5 segments.

Abdominal terga glossy, with fine and poorly visible (at x70) microsculpture consisting of meshes, with fine puncturation, distance between punctures 1­3 times their diameter.

Male tergum 7 without tubercles; tergum 8 with several small tubercles in front of posterior margin ( Fig. 22 View FIGURES 21 ­ 25 ). Posterior margin of male sternum 8 with pointed triangular lobe; some apical microsetae bifurcate ( Fig. 21 View FIGURES 21 ­ 25 ). Aedeagus as in Figs. 26­29, 31 View FIGURES 26 ­ 33 . Apex of median lobe with narrow process ( Fig. 29 View FIGURES 26 ­ 33 ).

Female tergum 8 with slightly concave posterior margin ( Fig. 24 View FIGURES 21 ­ 25 ), sternum 8 with posterior margin forming obtuse lobe ( Fig. 23 View FIGURES 21 ­ 25 ). Females have two spine­like accessory sclerites ( Fig. 25 View FIGURES 21 ­ 25 ). Spermatheca forming two­three coils ( Fig. 32­33 View FIGURES 26 ­ 33 ).

Variability: In some specimens the basal abdominal segments are brown. Strength of pronotal puncturation is variable.

Synonyms. The types of Dolosota pernix and Homalota silacea are identical in external characters and genitalia. The synonymy established by Leng (1920) and Fenyes (1920) is confirmed.

Distribution: Known from Virginia and North Carolina ( Fig. 80 View FIGURE 80 ).

USNM

Smithsonian Institution, National Museum of Natural History

NMNH

Smithsonian Institution, National Museum of Natural History

FMNH

Field Museum of Natural History

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Staphylinidae

Genus

Microlia

Loc

Microlia silacea ( Erichson, 1839 )

Gusarov, Vladimir I. 2002
2002
Loc

Acrotona (Microlia) pernix:

Seevers 1978: 257
1978
Loc

Atheta (Microdota) pernix:

Seevers 1978: 257
Moore 1975: 374
Moore 1975: 374
Leng 1927: 22
1927
Loc

Homalota silacea:

Leng 1920: 115
1920
Loc

Homalota pernix:

Leng 1920: 115
Leng 1920: 119
1920
Loc

Atheta (Microdota) silacea:

Fenyes 1920: 187
1920
Loc

Atheta (Microdota) pernix:

Leng 1927: 22
Bernhauer 1926: 635
Bernhauer 1926: 635
Fenyes 1920: 187
1920
Loc

Dolosota (Microlia) pernix

Casey 1910: 144
1910
Loc

Homalota silacea:

Bland 1865: 398
1865
Loc

Homalota silacea

Erichson 1839: 120
1839
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