Ischnopoda Stephens, 1835, 1837

PA – NIK, GRZEGORZ, 2006, Taxonomy and phylogeny of the World species of the genus Ischnopoda Stephens, 1837 (Coleoptera, Staphylinidae: Aleocharinae), Zootaxa 1179 (1), pp. 1-96 : 12-17

publication ID

https://doi.org/ 10.11646/zootaxa.1179.1.1

DOI

https://doi.org/10.5281/zenodo.5059376

persistent identifier

https://treatment.plazi.org/id/70263F02-8322-F72B-5D6B-F983FED69905

treatment provided by

Felipe

scientific name

Ischnopoda Stephens, 1835
status

 

Genus Ischnopoda Stephens, 1835 View in CoL ( Figs. 2–15)

Ischnopoda Stephens, 1835: 430 View in CoL .

Type species: Staphylinus leucopus Marsham, 1802: 506 (fixed by the International Commission of Zoological Nomenclature ( ICZN 1961)).

Ischnopoda: Thomson, 1859:35 View in CoL (as valid genus).

Ischnopoda: Thomson, 1861:4 View in CoL (as valid genus).

Cathusya Mulsant & Rey, 1875: 383 (as subgenus of Tachyusa View in CoL ) syn. n.

Type species: Tachyusa scitula Erichson, 1837: 308 (by monotypy).

Rechota Sharp, 1883: 228 View in CoL , syn. n.

Type species: Rechota impressa Sharp, 1883: 229 (by monotypy).

Tachyusa (Ischnopoda) : Ganglbauer, 1895: 244 (as valid subgenus of Tachyusa View in CoL ).

Amanota Casey, 1906: 189 View in CoL , syn. n.

Type species: Amanota capensis Casey, 1906: 190 (by monotypy).

Ischnopoda: Reitter, 1909: 72 View in CoL (as valid genus).

Calischnopoda Reitter, 1909: 73 (as subgenus of Ischnopoda ), syn. n.

Type species: Drusilla exarata Mannerheim, 1830: 85 (by monotypy).

Tachyusa (Ischnopoda) : Bernhauer & Scheerpeltz, 1926: 583 (as valid subgenus of Tachyusa View in CoL ). Pischnopoda Tottenham, 1939: 226 .

Type species: Staphylinus leucopus Marsham, 1802: 506 (junior objective synonym of Ischnopoda Stephens, 1835 (fixed by the International Commission of Zoological Nomenclature ( ICZN 1961)).

Tachyusa (Ischnopoda) : Lohse, 1974: 70 (as valid subgenus of Tachyusa View in CoL ).

Ischnopoda: Lucht & Klausnitzer, 1998: 176 View in CoL (as valid genus).

Diagnosis. Ischnopoda can be recognized by the combination of the following characters: body parallel­sided; ligula ( Fig. 5 View FIGURES 3–7 ) narrow and short, bifid to about middle, lobes divergent apically; pronotal hypomera fully visible in lateral view; lateral sides of elytra weakly arcuate, widest in posterior 1/3, postero­lateral angles very slightly sinuate; abdomen slightly constricted at base; tergal basal transverse impressions coarsely and densely punctuate; tarsal formula 4­5­5; metatarsus long, exceeding 4/5 length of metatibia; basal segment of metatarsus at least subequal in length to following two tarsal segments combined.

Redescription. Body. Small to medium sized, length 2.1–4.5 mm. Body parallelsided, moderately to strongly convex, dull to glossy ( Fig. 2).

Head. Circular in outline, temples parallel­sided or arcuately narrowed to hind angles; eyes protruding from lateral contours of head, genae not margined. Antennae moderately long, distinctly increased in width apically.

Mouthparts. Maxillary palpi 4­segmented ( Fig. 3 View FIGURES 3–7 ), palpomere 1 very short, palpomere 2 elongate, slightly widened apically, palpomere 3 slightly longer than 2, palpomere 4 short, subuliform. Galea long and slender, subequal in length to lacinia ( Fig. 3 View FIGURES 3–7 ). Labrum ( Fig. 4 View FIGURES 3–7 ) transverse, moderately arcuately emarginate apically and with characteristic arrangement of setae. Labial palpi 3­segmented ( Fig. 5 View FIGURES 3–7 ), palpomere 1 elongate, palpomere 2 shorter and narrower than 1, palpomere 3 narrower and much longer than 2. Ligula ( Fig. 5 View FIGURES 3–7 ) narrow and short, bifid to about middle, lobes divergent apically. Mentum trapezoidal ( Fig. 6 View FIGURES 3–7 ), with five long setae on each side, apical margin slightly concave, anterior angles rounded. Mandibles curved towards apex, right mandible ( Fig. 7 View FIGURES 3–7 ) with distinct molar tooth at middle of inner margin, faintly serrate in dorsal molar region.

Thorax. Pronotum subquadrate to transverse, moderately to strongly convex, dull to glossy, widest in apical third, lateral sides narrowed in straight line or concavely to hind angles. Pubescence at midline of one of three types: directed entirely anteriorly, directed entirely posteriorly or directed posteriorly in apical half and anteriorly in basal half; pubescence at lateral parts directed arcuately laterally or arcuately inward ( Fig. 8 View FIGURES 8–9 ). Hypomera fully visible in lateral view. Mesocoxae varie from narrowly to widely separated ( Figs. 10–15 View FIGURES 10–15 ). Mesosternal process varies from narrowly triangular, extending to 1/2 length of mesocoxa and separated from metasternal process by short and narrow isthmus ( Fig. 10 View FIGURES 10–15 ), throughout intermediate states ( Figs. 11–14 View FIGURES 10–15 ) to broad and short, extending to 1/3 length of mesocoxa and separated from metasternal process by short transverse isthmus ( Fig. 15 View FIGURES 10–15 ). Mesocoxal cavities not or margined posteriorly by fine bead.

Elytra. Slightly wider than pronotum, lateral sides weakly arcuate, widest in posterior 1/3, postero­lateral angles very slightly sinuate ( Fig. 9 View FIGURES 8–9 ).

Legs. Tarsal formula 4­5­5. Metatarsus long, exceeding 4/5 length of metatibia; basal segment of metatarsus at least subequal in length to following two tarsal segments combined.

Abdomen. Slightly constricted at base, widest at level of tergites 5 and 6, tergites 3–5 distinctly transversely impressed at base, tergites 5 and 7 subequal in length, sternites 3–5 slightly transversely impressed at base, tergal and sternal impressions coarsely and densely punctuate.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Staphylinidae

Loc

Ischnopoda Stephens, 1835

PA – NIK, GRZEGORZ 2006
2006
Loc

Ischnopoda: Lucht & Klausnitzer, 1998: 176

Lucht, W. & Klausnitzer, B. 1998: 176
1998
Loc

Tachyusa (Ischnopoda)

Lohse, G. A. 1974: 70
1974
Loc

Tachyusa (Ischnopoda)

Tottenham, C. E. 1939: 226
Bernhauer, M. & Scheerpeltz, O. 1926: 583
1926
Loc

Ischnopoda: Reitter, 1909: 72

Reitter, E. 1909: 72
1909
Loc

Calischnopoda

Reitter, E. 1909: 73
1909
Loc

Amanota

Casey, T. L. 1906: 189
1906
Loc

Tachyusa (Ischnopoda)

Ganglbauer, L. 1895: 244
1895
Loc

Rechota

Sharp, D. 1883: 228
1883
Loc

Ischnopoda:

Thomson, C. G. 1861: 4
1861
Loc

Ischnopoda:

Thomson, C. G. 1859: 35
1859
Loc

Ischnopoda Stephens, 1835: 430

Stephens, J. F. 1835: 430
1835
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