@article {1515,
	title = {Onthophagus yucatanus, a new species of the Clypeatus group from Mexico and Guatemala (Coleoptera: Scarabaeidae)},
	journal = {Florida Entomologist},
	volume = {89},
	number = {1},
	year = {2006},
	pages = {6-9},
	abstract = {A new Mexican and Guatemalan species, Onthophagus yucatanus , belonging to the Clypeatus group is described and illustrated. The distinctive characters of this species, its geographical distribution, and habits are described. },
	keywords = {Guatemala, Mexico, new species, Onthophagus, Scarabaeidae},
	author = {Delgado, Leonardo and Peraza, Lizandro N. and DeLoya, Cuauhtemoc}
}
@article {1636,
	title = {Experimental investigations of colonisation by north temperate dung beetles of different types of domestic herbivore dung},
	journal = {Applied Soil Ecology},
	volume = {20},
	number = {1},
	year = {2002},
	note = {Times Cited: 1Cited Reference Count: 33Cited References:      ASCHENBORN HH, 1989, ENTOMOL EXP APPL, V53, P73     BARBERO E, 1999, J INSECT CONSERVATIO, V3, P75     BISTROM O, 1991, ENTOMOL FENNICA, V2, P53     BREYMEYER A, 1975, B ACAD POLONAISE SB, V23, P173     DADOUR IR, 1996, ENVIRON ENTOMOL, V25, P1026     DANIEL WW, 1978, APPL NONPARAMETRIC S     EDWARDS PB, 1991, FUNCT ECOL, V5, P617     FINN JA, 1998, APPL SOIL ECOL, V10, P27     FINN JA, 2000, ECOGRAPHY, V23, P301     FINN JA, 1999, ECOL ENTOMOL, V24, P24     FINN JA, 1998, THESIS NATL U IRELAN, P199     GITTINGS T, 1998, ECOGRAPHY, V21, P581     GITTINGS T, 1997, ECOGRAPHY, V20, P55     GITTINGS T, 1994, PEDOBIOLOGIA, V38, P455     GITTINGS T, 1994, THESIS NATL U IRELAN, P323     GREENHAM PM, 1972, J ANIM ECOL, V41, P153     HANSKI I, 1991, DUNG BEETLE ECOLOGY, P75     HIMMELSBACH W, 1993, THESIS FREIBURG     HIRSCHBERGER P, 1994, PEDOBIOLOGIA, V38, P375     HOLTER P, 1983, EARTHWORM ECOLOGY, P49     HOLTER P, 1979, ECOL ENTOMOL, V4, P317     HOLTER P, 1982, OIKOS, V39, P213     HOLTER P, 1979, OIKOS, V32, P393     KIELY J, 1984, SOIL SURVEY B FORAS, V38     LUMARET JP, 1993, J APPL ECOL, V30, P428     MACQUEEN A, 1986, J AUST ENTOMOL SOC, V25, P23     OLECHOWICZ E, 1974, ECOL POL, V22, P589     PALMER WA, 1983, PROT ECOL, V5, P153     RAINIO M, 1966, ANN ZOOL FENN, V3, P88     RASSI P, 1991, 30 MIN ENV, P328     RIDSDILLSMITH TJ, 1986, B ENTOMOL RES, V76, P63     SOWIG P, 1994, ZOOL JB SYST, V121, P171     TYNDALEBISCOE M, 1981, B ENTOMOL RES, V71, P137EnglishArticle578NGAPPL SOIL ECOL},
	month = {Apr},
	pages = {1-13},
	abstract = {Field experiments investigated the colonisation by a north temperate dung beetle community (Aphodius, Geotrupes and Sphaeridium species) of artificial, standardised (11) dung pats from native herbivore species (cow, horse and sheep). An additional experiment compared the colonisation by dung beetles of five different types of cow dung. These experiments did not examine naturally occurring dung pats, but used experimental dung pats to examine the ability of north temperate dung beetles to discriminate among different dung types. A small number of laboratory experiments investigated pat residence times (PRT) and larval production across different dung types. There were significant differences in the biomass and abundance of dung beetle colonisation across different dung types. Sheep dung tended to have highest abundances of beetles, but there was evidence of species-specific differences in dung beetle colonisation of the different kinds of dung. In two out of three comparisons, laboratory experiments provided evidence that adult PRT were significantly different among different kinds of dung. In each of three laboratory experiments, larval production was significantly higher in sheep than cow dung pats of the same size. The relevance of these findings to the interpretation of what constitutes a dung type preference is discussed. (C) 2002 Elsevier Science B.V. All rights reserved.},
	keywords = {abundance, aphodius, assemblage, cattle dung, COLEOPTERA, colonisation, disappearance, dung beetle, Onthophagus, resource, resource utilization, Scarabaeidae, Scarabaeoidea, seasonal-changes, utilisation},
	url = {<Go to ISI>://000177123900001},
	author = {Finn, J. A. and Giller, P. S.}
}
@article {2096,
	title = {Body size and paternal invest ment in the genus Onthophagus (Coleoptera, Scarabaeoidea)},
	journal = {Journal of Zoology},
	volume = {255},
	year = {2001},
	note = {EnglishArticleNOV3J ZOOL},
	pages = {405-412},
	abstract = {During reproduction, dung beetles of the genus Onthophagus typically bury portions of dung removed from the dung pad. Even though females are capable of successfully constructing and provisioning nests when unaccompanied by males, extensive levels of co-operation between sexes have been reported. In some species, males show a clear dimorphism in body plan and only large horned males are known to assist females. In O. taurus this form of paternal investment is facultative and depends on social context (namely the presence of other males). We studied relationships between body size and paternal investment in five Onthophagus species (i.e. O. coenobita, O. fracticornis, O. illyricus, O. taurus and O. vacca). Two types of tests were established. In test A, a large and a small male were placed with a single, medium-size female, in test B, a large and a small female were placed with a single large male. In controls one male was placed with one female. Individuals were maintained for 10 days. Then the enclosures were opened to assess the position of each beetle. When two mates were found in close vicinity or in the same tunnel provisioning dung, a co-operative behaviour was assumed. In competitive tests, small males and small females never cooperated with their potential mates whilst large and medium-size individuals often co- operated with mates inside the same tunnels. No differences in frequencies of co-operation were found between large and medium-size females. Small females and small males scarcely co- operated with large or medium-size mates in controls. These results suggest that large individuals outcompete the small ones. They also suggest that paternal investment depends on body size of both mates. Large males of all species assist medium-size and large females, whereas small males do not. However, large males do not invest much parental effort on small females that, in fact, are poorly, assisted. We assume that large individuals of both sexes are reproductively superior to small ones. The propensity of both small females and small males to excavate was lower than that of larger individuals, accordingly, digging capacity could be a proximate factor explaining facultative paternal investment in these species.},
	keywords = {ACUMINATUS COLEOPTERA, ALTERNATIVE REPRODUCTIVE TACTICS, beetle, body size, BROOD CARE, co-operation, Dung beetles, investment, MALE HORN DIMORPHISM, MALE MORPHOLOGY, Onthophagus, paternal, reproduction, Scarabaeidae, TAURUS COLEOPTERA, VACCA COLEOPTERA},
	author = {Palestrini, C. and Rolando, A.}
}
