A revision of the neotropical beetle genus Isanopus Sharp, 1876 (Coleoptera: Staphylinidae: Staphylinini)
Chatzimanolis, Stylianos
Journal of Natural History
2008
2008-07-31
42
25 - 26
1765
1792
3Q34P
Chatzimanolis, 2008
Chatzimanolis
2008
[600,763,632,656]
Insecta
Staphylinidae
Isanopus
GBIF
Animalia
Coleoptera
9
1773
Arthropoda
species
ashei
sp. nov.
( Figures 2A, 4A, 5A–C) Diagnosis This species along with I. hinojosaiand I. sallaeihas fewer and less dense punctures on the head and pronotum than other species of Isanopus. Isanopus asheican be distinguished from all other species of Isanopusby the uniform colour of the abdomen (dark orange to rufous) in all visible segments and the shape of the aedeagus ( Figures 5A–C). Description Length 11.5–13 mm. Colouration. Colour of head and pronotum brown to black. Antenna brown. Scutellum dark brown to black. Elytra brilliant metallic blue, greenish blue or purplish blue. Abdomen dark orange to rufous, anterior half of every segment slightly darker than posterior half. Legs dark brown. Head. Head with relatively small brown microsetae and longer black macrosetae along borders of head; head subquadrate, width: length ratio51.18. Surface of epicranium glossy, with no micropunctures. Epicranium flat, with sparse mediumsized umbilicate setose punctures laterally, no punctures medially, setose punctures irregularly arranged in 2–3 rows anterior-posteriorly, punctures smaller around eyes, distance between punctures various, from 0.5–1 times width of punctures. Eyes medium, length of eyes/length of head50.46, distance between eyes as wide as 1.8 times length of eye. Postgena with large, longitudinally elongate punctures (about 3– 4 punctures/ 0.5 mm), punctures not uniformly distributed. Antennomeres 1–3 with long macrosetae, antennomere 1 gradually club-like thickened, antennomeres 1–11 longer than wide, antennomere 1 about twice as long as antennomere 2, antennomere 3 1.5 times longer than antennomere 2, antennomere 4 slightly shorter than antennomere 3, antennomeres 5–10 almost identical, 3.5 times longer Figure 4. Antennae. (A) I. ashei. (B) I. sallaei. (C) I. eptaskouros. (D) I. tenuicornis. (E) I. hinojosai. Scale in Figure 4E 51.38 mm. than wide, antennomere 11 subequal to previous antennomeres. Neck dorsally with no punctures or micropunctures, laterally with 1–2 small punctures. Thorax. Pronotum longer than wide, width: length ratio50.84; antero-lateral angles obtusely rounded, curved. Lateral margins of pronotum concave in dorsal aspect, pronotum broadest in apical 1/4 and narrower at basal angles. Surface of pronotum flat, glossy, with no micropunctures. Setose punctures absent on disc of pronotum, laterally present in 3–4 rows, distance between rows smaller towards lateral ends; punctures of medium size (about four punctures/ 0.5 mm); least distance between punctures for each row various, 1–2 times width of puncture for most. Pronotum with brown microsetae directed postero-medially in lateral and anterior areas and posteriorly in basal half, and few longer black macrosetae along borders. Scutellum prominent, with brown microsetae and sparse punctures, least distance between punctures 0.5–1 times width of puncture. Figure 5. Aedeagus of I. ashei. (A) Dorsal view. (B) Lateral view. (C) Detail of paramere, dorsal view. Elytra subequal in length to pronotum, with medium setose uniform punctures (5–6 punctures/ 0.5 mm), covered with yellowish brown microsetae and longer black macrosetae along borders of elytra. Legs. Protarsus enlarged; meso and metatarsi elongate, enlarged, tarsomeres 1–4, asymmetrical, dilated distally. Legs almost completely covered with long yellow and brown setae. Abdomen. Abdominal terga III–V with tergal basal and no subbasal (arch-like) carina. Terga III–VII with uniform punctuation patterns, densely covered with punctures and yellowish brown setae, punctures decreasing in size gradually from III–VII. Abdominal sterna III–IV with moderate transverse impressions, V with faint transverse impression, shining. Integument surface appearing iridescent in strong direct light at moderate to high magnification. Sterna III–VII densely punctuated, punctures decreasing in size gradually from III–VII, with yellowish brown setae. Lateral tergal sclerites of the abdominal segment IX long and straight, covered with long black macrosetae. Secondary sexual structures. Male: distal margin of sternum VII with slight emargination medially; sternum VIII with deep V-shaped emargination medially; sternum IX with small emargination medially. Females: with no obvious sexual structures. Aedeagus. As in Figures 5A–C; paramere extremely reduced; paramere: median lobe ratio50.23. Paramere in dorsal view fairly wide but expanding to two rounded apical processes, with a wide U-shaped emargination between them; in lateral outline almost straight; with no apparent sensory spinules. Median lobe in dorsal view wide, converging to narrow apex; in lateral view becoming narrower and curved from middle to apex, apex with hook-like process. Holotype. Male, with labels as follows: ‘‘ Panama, Chiriqui, 5.6 kmN Boquete, La Culebratrail, 1490 m, 8 °499230N, 82 °259180W, vi.15.1996, J.S. Asheand R. Brooks, PAN1AB96 159, ex: treefall/slash litter’’/[barcode label] ‘‘ SM0016597’’/‘‘ Holotype Isanopus asheiChatzimanolis, design. Chatzimanolis2007’’. Inthe collection of Snow Entomological Collection, Division of Entomology, Natural History Museum/ BRC, University of Kansas, Lawrence. Paratypes, 13; with locality data as above and barcode labels: SM0016596, SM0016598, SM0016599( 3 in SEMC); COSTA RICA: San Jose Prov., 2.4 kmENE Sn Gerardo de Rivas, trail to Chirripo Natl. Park, 2070 m, 9 °27.939N, 83 °34.039W, vi.10.2004, J.S.Ashe, Z. Falinand I. Hinojosa, ex: treefall litter, barcode labels: SM0607677, SM0607675, SM0607676( 3 in SEMC); San Jose, Zurqui de Moravia, 1600 m, 10 °39N, 84 °19W, i.1–30.1996, P. Hanson, ex: malaise, barcode labels: SM0133116( 1 in SEMC), ( 1 in UTCI); San Jose Prov., 2.4 kmENE Sn Gerardo de Rivas, Cloudbridge Reserve, ridge above covered bridge, 1860 m, 9 °28.689N, 83 °34.009W, vi.11.2004, J.S.Ashe, Z. Falinand I. Hinojosa, ex: treefall litter, barcode label: SM0607686( 1 in SEMC); San Jose Prov., San Juan, 14 kmNE Finca Zurqui, 10 °29570N, 84 °09220W, 1490 m, vii.4–6.2000, J.S.Ashe, R. Brooksand Z. Falin, ex: flight intercept trap, barcode label SM0203734( 1 in SEMC); Cartago, P.N.Tapanti. 1740m, 9 °449300N, 83 °489300W, vi.4.1997, R. Anderson, ex: berlese forest litter, barcode label: SM0120360( 1 in SEMC); Cartago, P.N.Tapanti. 1150 m, 9 °459410N, 83 °47950W, vi.17–20.2000, J.S. Asheand R. Brooks, ex: flight intercept trap, barcode label: SM0203331( 1 in SEMC); Heredia, Zurqui, 1600 m, ix.1–9.1998, FIT, C.W. and L.B. O’Brien( 1 in FMNH). All paratypeswith label ‘‘ Paratype Isanopus asheiChatzimanolisdesign. Chatzimanolis 2007’’. Etymology. This species is named in honor of the late J. Steve Ashe, friend and mentor, who inspired my Xanthopyginastudies and collected the holotype. Distribution. Known from elevations of 1150–2070 min Costa Ricaand Panama( Figure 10). Habitat. Collected in treefall litter, malaise traps and flight intercept traps. Isanopus eptaskouros sp. n. ( Figures 2D, 4C, 6A, 6C) Diagnosis Isanopus eptaskouroscan be distinguished from all other species in Isanopusby the colouration of abdominal segment VII. In I. eptaskourosit is completely dark brown-black, while in other species it is either yellowish-orange or a combination of dark brown-black and orange. Aedeagus ( Figures 6A–C) is also distinctive. Description Length 11–12.5 mm. Colouration. Colour of head and pronotum dark brown-black. Antenna brown. Scutellum dark brown-black. Elytra bright metallic blue, purplish blue, sometimes with green overtones. Abdomen dark brown, except segments VIII–IX yellow. Legs dark brown. Head, pronotum and abdomen integument appearing iridescent under direct light. Head. Head with many relatively small brown microsetae and longer black macrosetae along borders of head; head subquadrate, width: length ratio50.91. Surface of epicranium glossy, with few micropunctures distributed at centre. Epicranium slightly convex, with small-sized umbilicate setose punctures covering head except medially, punctures only slighter smaller around eyes and at base of head, distance between punctures various, from 0.5–1 times width of punctures at centre, but punctures at antero-lateral and posterior part of head almost confluent. Eyes medium, length of eyes/length of head50.60, distance between eyes as wide as 1.6 times length of eye. Postgena with medium to large, not longitudinally elongate punctures (about eight punctures/ 0.5 mm), punctures uniformly distributed. Antennomeres with long macrosetae, antennomere 1 gradually club-like thickened, antennomeres 1–11 longer than wide, antennomere 1 about twice as long as antennomere 2, antennomere 3 about 1.5 times as long as antennomere 2, antennomere 4 slightly shorter than antennomere 3, antennomeres 5–7 almost identical, twice as long as wide, antennomeres 8–10 almost identical, shorter than 5– 7, antennomere 11 longer than previous antennomeres. Neck with multiple small irregular punctures and micropunctures posteriorly. Figure 6. Aedeagus of I. eptaskouros. (A) Dorsal view. (B) Lateral view. (C) Detail of paramere, ventral view. Thorax. Pronotum longer than wide, width: length ratio50.90; antero-lateral angles obtusely rounded, slightly curved. Lateral margins of pronotum concave in dorsal aspect, pronotum broadest in apical 1/3 and narrower at basal angles. Surface of pronotum flat, glossy, with micropunctures. Setose punctures absent on disc of pronotum, laterally present in 4–5 rows, distance between rows smaller towards lateral ends; punctures of medium size (about four punctures/ 0.5 mm); the least distance between punctures for each row various, 1–2 times width of puncture for most; antero-lateral angles densely punctuated, distance between punctures 0.5–1 times width of puncture. Pronotum with brown microsetae directed postero-medially in lateral and anterior areas and posteriorly in basal half; and few longer black macrosetae along borders. Scutellum prominent, with brown microsetae and dense punctures, punctures confluent. Elytra subequal in length to pronotum, with medium setose uniform punctures (about seven punctures/ 0.5 mm), covered with yellowish brown microsetae and longer black macrosetae along borders of elytra. Legs. Protarsus enlarged; meso and metatarsi slightly elongate and enlarged, tarsomeres 1–4 asymmetrical, dilated distally. Legs almost completely covered with long yellow and brown setae. Abdomen. Abdominal terga III–V with tergal basal and no subbasal (arch-like) carina. Terga III–VII with uniform punctuation patterns, densely covered with punctures and yellowish brown setae, punctures not decreasing in size gradually from III–VII. Abdominal sterna III–IV with moderate transverse impressions, V with faint transverse impression, shining. Integument surface appearing strongly iridescent in strong direct light at moderate to high magnification. Sterna III–VII densely punctuated, punctures not decreasing in size gradually from III–VII, with yellowish brown setae. Lateral tergal sclerites of the abdominal segment IX long and straight, covered with long black macrosetae. Secondary sexual structures. Male: distal margin of sternum VII with slight emargination medially; sternum VIII with deep V-shaped emargination medially; sternum IX with small emargination medially. Females: with no obvious sexual structures. Aedeagus. As in Figures 6A–C; paramere slightly reduced; paramere: median lobe ratio50.74. Paramere in dorsal view almost parallel-sided converging to rounded tip; in lateral outline almost straight, with two rows of spinules. Median lobe in dorsal view wide, almost parallel-sided, constricted to a narrower rounded apical lobe; in lateral view becoming narrower from middle to apex, apex with a small dorsal tooth, rounded. Holotype, male, with labels as follows: ‘‘ Peru: CuzcoDept., Consuelo, Manu Rd. km 165, x.7.1982’’/‘‘FMHD #82-350, ex litter under crown of felled tree. L. E. Watrous and A. C. Mazurek’’/‘‘ Isanopusdet. Newton 1992’’/‘‘ Holotype Isanopus eptaskourosChatzimanolis, design. Chatzimanolis 2007’’. In the collection of the Field Museum of Natural History, Chicago. The type locality is also known as ‘‘ 15.9 kmSW Pilcopata, 13.02369S, 71.491859W’’ ( Patterson et al. 2006). Paratypes: 3, with same first locality label as the holotype, and subsequent labels for each: ‘‘FMHD #82-319, ex leaf litter. L. E. Watrous and A. C. Mazurek’’; ‘‘FMHD #82- 356, ex beating palm branches. L. E. Watrous and A. C. Mazurek’’; and ‘‘FMHD #82-332, ex rotten palm. L. E. Watrous and A. C. Mazurek’’. All paratypeswith label ‘‘ Paratype Isanopus eptaskourosChatzimanolisdesign. Chatzimanolis 2007’’. In the collection of the Field Museum of Natural History, Chicago. Etymology. The specific epithet is the combination of two Greek words, the word epta( EPTA) that means seven and the word skouros( SKo MRo z) that means dark, and refers to the abdominal segment VII that is completely dark brown to back. The epithet is a noun in apposition. Distribution. Known from CuzcoDept. in Peru( Figure 11). Habitat. Collected in rotten palms, and leaf litter of rotten trees.
R
J. S. Ashe & Brooks
La Culebra
1490
Male
Chiriqui
12
1776
SM0016597
1
holotype
Lawrence
Chatzimanolis
University of Kansas
12
1776
1
holotype
SEMC
12
1776
SM0016596, SM0016598, SM0016599
1
paratype
SEMC
J. S. Ashe & Z. Falin & Hinojosa
Costa Rica
2070
9.46565
Chirripo Natl. Park
1
-83.567314
12
1776
SM0607677, SM0607675, SM0607676
1
San Jose
paratype
SEMC, UTCI
P. Hanson
Costa Rica
1600
10.65
Zurqui de Moravia
1297
-84.316666
12
1776
SM0133116
1
San Jose
paratype
SEMC
J. S. Ashe & Z. Falin & Hinojosa
Costa Rica
1860
9.47815
Cloudbridge Reserve
1
-83.56682
12
1776
SM0607686
1
San Jose
paratype
R
J. S. Ashe
Costa Rica
1490
San Juan
12
1776
1
San Jose
paratype
SEMC
Z. Falin
Costa Rica
Brooks
12
1776
SM0203734
1
San Jose
paratype
[259,1099,843,867]
R
P. N. Tapanti.
Costa Rica
1740
Cartago
12
1776
1
Cartago
paratype
[146,1098,876,900]
SEMC
Costa Rica
Anderson
12
1776
SM0120360
1
Cartago
paratype
R
P. N. Tapanti. & J. S. Ashe
Costa Rica
1150
Cartago
12
1776
1
Cartago
paratype
[237,1098,940,964]
SEMC
Costa Rica
Brooks
12
1776
SM0203331
1
Cartago
paratype
[146,640,973,997]
FIT
Costa Rica
1600
Zurqui
12
1776
1
Heredia
paratype
FMNH
C. W. and L. B. O'Brien & All
Costa Rica
12
1776
1
Heredia
paratype