Ips cribricollis, male frons
Ips cribricollis, male frons
Ips cribricollis, female frons
Ips cribricollis, elytral disc
Ips cribricollis, male declivity
Ips cribricollis, male declivity
Ips cribricollis, female declivity
Ips cribricollis, male lateral habitus
Ips cribricollis, male lateral habitus

Scientific Name

Ips cribricollis (Eichhoff, 1868)

Synonyms

Ips cloudcrofti Swaine, 1925

Diagnostic notes

-Has five spines on the elytral declivity, body length less than 4.5 mm, frons with central tubercle present and separated from edge of mouth cavity by 2 to 3 times its diameter; scattered frons tubercles separated from each other by more than their own diameter.
-Potentially sympatric in Central America and Mexico with similar species I. grandicollis.
-I. grandicollis differs from I. cribricollis by having denser tubercles on the frons (separated by about their diameter near eyes) the absence of a fovea on the male frons, and the width of the pars stridens (Lanier 1987).

Morphological Summary

females
Body. 2.9-4.0 mm long, 2.6-2.8 times longer than wide; pronotum 1.1-1.2 times longer than wide.
Head. Epistomal margin with uniseriate row of tubercles with elongate mesal tubercle or with gap at midline. Frons outline convex in lateral view; vestiture fine (not hiding part of integument); surface sculpture near epistoma with isolated tubercles; central carina absent; central tubercle present and single, separated from base of epistomal setae by 2-3 tubercle diameters, without pair of circular tubercles on either side of midline; transverse carina absent; frons central fovea present or absent; circular tubercles above top of eyes present - up to, or more than one third of all tubercles. Vertex and pronotum with stridulatory apparatus (pars stridens). Antennal club sutures acutely angulate.
Prothorax. Protibiae with three or four socketed teeth on apical half (does not include apical spine).
Elytra. Interstriae punctate (observed on interstriae 2 and 3 on middle third of elytral disc), punctures 0.3(-0.4) times diameter of adjacent strial punctures (punctures and striae measured at steepest part of puncture wall), interstrial setae longer than width of scutellar shield, interstriae (4-)5(-6) times as wide as adjacent striae. Elytral declivity with five spines per side, spine 3 largest; spine 1 (largest on 2nd interstria) closer to spine 2 than suture; spines 1 and 2 separated at base by distance less than height of spine 1; spine 2 closer to spine 1 than spine 3; spine 3 hooked, apex obtuse to rounded, with apical half asymmetrical in lateral view; spines 2 and 3 not on shared tumescence, not in line with spines 1 and 4 (posterodorsal view); spine 4 closer to spine 5 than spine 3; declivital integument shiny.

males
Body. 2.9-4.0 mm long, 2.6-2.8 times longer than wide; pronotum 1.1-1.2 times longer than wide.
Head. Epistomal margin with uniseriate row of tubercles with elongate mesal tubercle or with gap at midline. Frons outline convex in lateral view; vestiture fine (not hiding part of integument); surface sculpture near epistoma with isolated tubercles; central carina absent; central tubercle present and single, separated from base of epistomal setae by 2-3 tubercle diameters, without pair of circular tubercles on either side of midline; transverse carina absent; frons central fovea absent; circular tubercles above top of eyes present - up to, or more than one third of all tubercles. Vertex and pronotum with or without stridulatory apparatus (pars stridens). Antennal club sutures acutely angulate.
Prothorax. Protibiae with three socketed teeth on apical half (does not include apical spine).
Elytra. Interstriae punctate (observed on interstriae 2 and 3 on middle third of elytral disc), punctures 0.3(-0.4) times diameter of adjacent strial punctures (punctures and striae measured at steepest part of puncture wall), interstrial setae longer than width of scutellar shield, interstriae 2-3 times as wide as adjacent striae. Elytral declivity with five spines per side, spine 3 largest; spine 1 (largest on 2nd interstria) closer to suture than spine 2; spines 1 and 2 separated at base by distance greater than height of spine 1; spine 2 closer to spine 3 than spine 1; spine 3 hooked, apex obtuse to rounded, with apical half asymmetrical in lateral view; spines 2 and 3 on shared tumescence, not in line with spines 1 and 4 (posterodorsal view); spine 4 closer to spine 5 than spine 3; declivital integument shiny.

Geographic Distribution

Dominican Republic; Guatemala; Honduras; Jamaica; Mexico (Chiapas, Hidalgo, Jalisco, Mexico, Michoacan, Nuevo Leon, Sinaloa); Nicaragua; USA (New Mexico).

Hosts

Pinus spp.

Notes

Clade formed by (((I. apache + I. calligraphus) + I. lecontei) + I. cribricollis), see Cognato and Sun (2007). Treated as a synonym of I. grandicollis by Wood (1982).
Strong ability to kill trees (Lanier 1987), sometimes in association with Dendroctonus spp.

References

Cognato, A.I.2015. Biology, systematics, and evolution of Ips. In Bark beetles: biology and ecology of native and invasive species. Edited by F.E. Vega and R.W. Hofstetter. Elsevier, San Diego, California. Pp. 351–370.

Cognato, A.I. and Sun, J.H. 2007. DNA based cladograms augment the discovery of a new Ips species from China (Coleoptera: Curculionidae: Scolytinae). Cladistics, 23: 539–551.

Wood, S.L. 1982. The bark and ambrosia beetles of North and Central America (Coleoptera: Scolytidae), a taxonomic monograph. Great Basin Naturalist Memoirs, 6: 1–1359.

Internet resources

https://www.barkbeetles.info/regional_chklist_target_species.php?lookUp=3730