DOCSLIB.ORG

Jaw Morphology and Fighting Forces in Stag Beetles Jana Goyens1,2,*, Joris Dirckx2 and Peter Aerts1,3

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Jaw Morphology and Fighting Forces in Stag Beetles Jana Goyens1,2,*, Joris Dirckx2 and Peter Aerts1,3 © 2016. Published by The Company of Biologists Ltd | Journal of Experimental Biology (2016) 219, 2955-2961 doi:10.1242/jeb.141614 RESEARCH ARTICLE Jaw morphology and fighting forces in stag beetles Jana Goyens1,2,*, Joris Dirckx2 and Peter Aerts1,3 ABSTRACT large and heavy musculature to bite their rivals forcefully. The jaws of different species of stag beetles show a large variety of Concomitantly, species with high bite forces probably needed to shapes and sizes. The male jaws are used as weapons in fights, and evolve a more robust jaw morphology to enable them to take a firm they may exert a very forceful bite in some species. We investigated in grip on rivals and to avoid mechanical failure (Goyens et al., 2015a). 16 species whether and how the forcefulness of their bite is reflected In sexually dimorphic stag beetle species, males with larger jaws in their jaw morphology. We found a large range of maximal muscle have higher mating rates than males with smaller jaws (Harvey and forces (1.8–33 N; factor of 18). Species investing in large bite muscles Gange, 2006; Lagarde et al., 2005; Okada and Hasegawa, 2005; also have disproportionately large jaw volumes. They use this Okada and Miyatake, 2006; Shiokawa and Iwahashi, 2000). Owing additional jaw volume to elongate their jaws, increasing their to their longer jaws, they can reach further forward in aggressive chances of winning in battles. The fact that this also decreases the battles to grab their opponent and to detach him from the substrate mechanical advantage is largely compensated for by elongated in- (Goyens et al., 2015b). Once detached, the opponent is pushed away ’ levers. As a result, high muscle forces are correlated with elevated or lifted above the winner s head and thrown backwards onto the bite forces (0.27–7.6 N; factor of 28). Despite the large difference in substrate (Goyens et al., 2015b; Shiokawa and Iwahashi, 2000). In ’ the forcefulness of their bite, all investigated species experience addition to the stag beetles jaws being elongated, their enlarged similar Von Mises stresses in their jaws while biting (29–114 MPa; jaw-closer muscles enable high bite forces (Goyens et al., 2014a; factor of 4.0; calculated with finite element simulations). Hence, stag Shiokawa and Iwahashi, 2000). In turn, these high bite forces beetles have successfully adapted their jaw anatomy according to probably require jaws that are robust against bending (Goyens et al., their bite force in fights. 2014b,c). However, these adaptations of stag beetle weaponry come at a cost. First, there are the direct locomotion costs of running and KEY WORDS: Lucanidae, Finite element analysis, Bite force, Animal flying with heavy weapons (the energy cost increases by 38% and weaponry, Mechanical advantage, Jaw length 26%, respectively, in Cyclommatus metallifer males compared with females of the same species; Goyens et al., 2015d,e). Second, stag INTRODUCTION beetles are holometabolous insects, and the growing mandibles have Animal weapons often show a high morphological diversity. This is to compete with other body parts for resources in the pupa (Kawano, exemplified by the jaws of stag beetles, the antlers of cervids and the 1997; Knell et al., 2004). horns of bovids and beetles. The diversification of beetle horns was In this study, we compared the weapon morphology of 16 probably stimulated by the different costs horns pose depending on stag beetle species with a wide range of jaw anatomies and the species’ ecology. For example, horns at the front of the head are associated muscle sizes (see Fig. 1). By combining finite element rare in nocturnal species because they are correlated with smaller (FE) analysis with measurements of bite muscle size, we examined eyes and, therefore, reduced vision (Emlen, 2001). However, for whether and how the jaw morphology of these 16 species is adapted most families, it remains unknown what exactly caused this to withstand deformations while biting. We hypothesized that stag evolutionary diversification (Emlen, 2008), and an in-depth beetles have adapted their jaw morphology according to their bite understanding of the functional morphology of these weapons is force, and that this prevents elevated material stresses that might essential to gain insight into this process. Stag beetles (family cause structural failure in the jaws of species with a more forceful Lucanidae) are an interesting model animal in this regard. Not only bite. do they display a remarkable diversity in the size and shape of male weapons (varying from small, indistinct jaws to impressive jaws that MATERIALS AND METHODS are longer than the rest of the body; see Fig. 1) but also their bite Micro-computed tomography (CT) scans forces are probably equally diverse (considering the range of head We obtained adult male stag beetles of 16 species from nine sizes; see Fig. 1). Hence, the stag beetle family may comprise an different genera, with a large variety of jaw sizes and shapes (see interesting range of different morphological strategies. Depending Fig. 1): Cyclommatus lunifer Boileau 1905 (specimen 1), on their specific fight behaviour, species may need long jaws or Cyclommatus metallifer (Boisduval 1835) (specimen 2a), Dorcus jaws with a specific shape. Furthermore, they may have invested in alcides Vollenhoven 1865 (specimen 3), Dorcus bucephalus (MacLeay 1819) (specimen 4), Dorcus parryi (Boileau 1902) 1University of Antwerp, Laboratory of Functional Morphology, Universiteitsplein 1, (specimen 5), Dorcus titanus (Boisduval 1835) (specimen 6), Antwerp 2610, Belgium. 2University of Antwerp, Laboratory of Biophysics and Hexarthrius parryi Hope 1842 (specimen 7), Lamprima adolphinae BioMedical Physics, Groenenborgerlaan 171, Antwerp 2020, Belgium. 3Ghent (Gestro 1875) (specimen 8), Lucanus cervus (Linneaus 1758) University, Department of Movement and Sport Sciences, Watersportlaan 2, Ghent 2000, Belgium. (specimen 9), Nigidius obesus Parry 1864 (specimen 10), Prismognathus davidis Deyrolle 1878 (specimen 11), *Author for correspondence ( [email protected]) Prosopocoilus bison (Olivier 1789) (specimen 12), Prosopocoilus J.G., 0000-0003-0176-884X giraffa Olivier 1789 (specimen 13), Prosopocoilus mohnikei Parry 1873 (specimen 14), Prosopocoilus senegalensis (Latreille Received 7 April 2016; Accepted 15 July 2016 1817) (specimen 15) and Pseudorhaetus oberthuri Planet 1899 Journal of Experimental Biology 2955 RESEARCH ARTICLE Journal of Experimental Biology (2016) 219, 2955-2961 doi:10.1242/jeb.141614 Fig. 1. Pictures of the heads of the stag beetle specimens used in this study. All specimens are male beetles of a different species, except for specimen 2b. All photos are shown at the same magnification. The scale bar indicates 5 mm. (specimen 16). Further, we acquired a female C. metallifer created and smoothed out a triangulated surface mesh of the individual (specimen 2b). All specimens were purchased from head and calculated its area. Using this head surface area, we authorized commercial dealers (The Pet Factory Germany, www. calculated the muscle force with the muscle stress (muscle force thepetfactory.de; The Bugmaniac, www.thebugmaniac.com; per PCSA) that was previously determined for C. metallifer stag Kingdom of Beetle Taiwan, screw-wholesale.myweb.hinet.net), beetles (Goyens et al., 2014a). This assumes that all species are except for the dead specimen of L. cervus, which was collected in capable of developing the same maximal muscle stress, which is a France [collaboration with Research Institute for Nature and Forest reasonable assumption because muscle stress in C. metallifer males (INBO), permission reference BL/FF-SB 09-03188]. These species is almost identical to that of females (which are not adapted for are not listed on CITES appendices (checklist.cites.org). Except for fighting; 18 and 17 N cm−2, respectively; Goyens et al., 2014a). the L. cervus and C. metallifer specimens, all specimens were dried. Because we only used the morphology of the exoskeleton in our FE simulations of jaw biting analyses, our results are not affected by shrinkage of soft tissue The FE method is a numerical method that can be used for the because of drying. We made micro-CT scans of the male specimens structural analysis of (complex) loaded structures. These structures with a Skyscan 1172 high resolution micro-CT scanner (Bruker are subdivided into a large number of small elements (a mesh), for micro-CT, Kontich, Belgium). The female specimen was scanned by which stresses (Von Mises stresses), strains and displacements are the Centre for X-ray Tomography of Ghent University. The micro- calculated (Bright, 2014; Dumont et al., 2009; Rayfield, 2007). CT scanners were operated at voltages of 59–120 kV and currents of Using the same method that we used to create the surface meshes 117–200 µA, which resulted in a resolution of 11–13 µm. of the heads, we also made surface models of the jaw cuticle for all 16 species. Based on these surface models, we calculated jaw cuticle Bite muscles volume, jaw length (out-lever, hinge–jaw tip) and input lever arm Ross et al. (2005) demonstrated that muscle forces can be applied in length (in-lever, hinge–muscle attachment on jaw; see Fig. 2) in FE analyses by estimating their overall force amplitude from the Amira. By multiplying the muscle force by the mechanical physiological cross-sectional area (PCSA) of the muscle (Ross advantage (in-lever divided by jaw length), we estimated the et al., 2005). For stag beetle bite muscles (i.e. closer muscles of the specimens’ bite forces (Goyens et al., 2014a; Mills et al., 2016). We jaws), the PCSA can be approximated by examining the attachment established scaling relationships between morphological variables area of the muscles on the head (Goyens et al., 2014a). The closer after log–log transformation with the reduced major axis. The muscles diverge from the jaw to the head capsule and have the shape measured slope was considered to be significantly different from the of a 3D cone (Goyens et al., 2014a).
Load more

Recommended publications
  • 1 It's All Geek to Me: Translating Names Of
    IT’S ALL GEEK TO ME: TRANSLATING NAMES OF INSECTARIUM ARTHROPODS Prof. J. Phineas Michaelson, O.M.P. U.S. Biological and Geological Survey of the Territories Central Post Office, Denver City, Colorado Territory [or Year 2016 c/o Kallima Consultants, Inc., PO Box 33084, Northglenn, CO 80233-0084] ABSTRACT Kids today! Why don’t they know the basics of Greek and Latin? Either they don’t pay attention in class, or in many cases schools just don’t teach these classic languages of science anymore. For those who are Latin and Greek-challenged, noted (fictional) Victorian entomologist and explorer, Prof. J. Phineas Michaelson, will present English translations of the scientific names that have been given to some of the popular common arthropods available for public exhibits. This paper will explore how species get their names, as well as a brief look at some of the naturalists that named them. INTRODUCTION Our education system just isn’t what it used to be. Classic languages such as Latin and Greek are no longer a part of standard curriculum. Unfortunately, this puts modern students of science at somewhat of a disadvantage compared to our predecessors when it comes to scientific names. In the insectarium world, Latin and Greek names are used for the arthropods that we display, but for most young entomologists, these words are just a challenge to pronounce and lack meaning. Working with arthropods, we all know that Entomology is the study of these animals. Sounding similar but totally different, Etymology is the study of the origin of words, and the history of word meaning.
    [Show full text]
  • Revision of the Endemic Madagascan Stag Beetle Genus <I>Ganelius</I
    University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Center for Systematic Entomology, Gainesville, Insecta Mundi Florida 12-29-2017 Revision of the endemic Madagascan stag beetle genus Ganelius Benesh, and description of a new, related genus (Coleoptera: Lucanidae: Lucaninae: Figulini) M. J. Paulsen University of Nebraska State Museum, [email protected] Follow this and additional works at: https://digitalcommons.unl.edu/insectamundi Part of the Ecology and Evolutionary Biology Commons, and the Entomology Commons Paulsen, M. J., "Revision of the endemic Madagascan stag beetle genus Ganelius Benesh, and description of a new, related genus (Coleoptera: Lucanidae: Lucaninae: Figulini)" (2017). Insecta Mundi. 1118. https://digitalcommons.unl.edu/insectamundi/1118 This Article is brought to you for free and open access by the Center for Systematic Entomology, Gainesville, Florida at DigitalCommons@University of Nebraska - Lincoln. It has been accepted for inclusion in Insecta Mundi by an authorized administrator of DigitalCommons@University of Nebraska - Lincoln. December 29 December INSECTA 2017 0592 1–16 A Journal of World Insect Systematics MUNDI 0592 Revision of the endemic Madagascan stag beetle genus Ganelius Benesh, and description of a new, related genus (Coleoptera: Lucanidae: Lucaninae: Figulini) M.J. Paulsen Systematic Research Collections University of Nebraska State Museum W436 Nebraska Hall Lincoln, NE 68588-0546 Date of Issue: December 29, 2017 CENTER FOR SYSTEMATIC ENTOMOLOGY, INC., Gainesville, FL M.J. Paulsen Revision of the endemic Madagascan stag beetle genus Ganelius Benesh, and description of a new, related genus (Coleoptera: Lucanidae: Lucaninae: Figulini) Insecta Mundi 0592: 1–16 ZooBank Registered: urn:lsid:zoobank.org:pub:DA6CBFE5-927E-45B6-9D05-69AC97AF7B76 Published in 2017 by Center for Systematic Entomology, Inc.
    [Show full text]
  • Two US Citizens Arrested in Australia for Beetle Smuggling
    Two US citizens arrested in Australia for beetle smuggling. by Vernon Antoine Brou Jr., 74320 Jack Loyd Road, Abita Springs, Louisiana 70420 USA E-mail: [email protected] The men, who were not identified for legal reasons before their first court appearance, each face fines of up to $93,000 and a maximum of 10 years in prison. They were arrested at the Australian Perth airport in April, 2008 for attempting to smuggle 1350 rare dead beetles out of the country as they were about to board a flight to the United States. The two individuals were only identified as by their age: one, 62 years old from Naples, Florida, and the other, 63 years old from Cambridge, Massachusetts. They were charged with exporting a regulated native species without a permit. Australian Customs officers acted on a tip from the public and stopped the men from boarding a flight to the United States. Customs officials allegedly found 1350 mostly native tiger beetles in glass vials of alcohol, concealed in empty plastic yogurt containers in the men’s luggage. A similar incident occurred in December 2002. Customs officials stopped two men from Nara Prefecture, Japan, aged 48 and 33, in an attempt to smuggle more than more than 600 rare stag beetles and 400 other insects out of Australia in cereal boxes and biscuit packets. The incident occurred at Sydney's Kingsford Smith Airport as the men attempted to board a flight to Thailand. About two-thirds of the specimens were alive. The men were charged with matters relating to the Environment Protection and Biodiversity Conservation Act 1999.
    [Show full text]
  • Lessons from Genome Skimming of Arthropod-Preserving Ethanol Benjamin Linard, P
    View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by Archive Ouverte en Sciences de l'Information et de la Communication Lessons from genome skimming of arthropod-preserving ethanol Benjamin Linard, P. Arribas, C. Andújar, A. Crampton-Platt, A. P. Vogler To cite this version: Benjamin Linard, P. Arribas, C. Andújar, A. Crampton-Platt, A. P. Vogler. Lessons from genome skimming of arthropod-preserving ethanol. Molecular Ecology Resources, Wiley/Blackwell, 2016, 16 (6), pp.1365-1377. 10.1111/1755-0998.12539. hal-01636888 HAL Id: hal-01636888 https://hal.archives-ouvertes.fr/hal-01636888 Submitted on 17 Jan 2019 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. 1 Lessons from genome skimming of arthropod-preserving 2 ethanol 3 Linard B.*1,4, Arribas P.*1,2,5, Andújar C.1,2, Crampton-Platt A.1,3, Vogler A.P. 1,2 4 5 1 Department of Life Sciences, Natural History Museum, Cromwell Road, London SW7 6 5BD, UK, 7 2 Department of Life Sciences, Imperial College London, Silwood Park Campus, Ascot 8 SL5 7PY, UK, 9 3 Department
    [Show full text]
  • The Stag Beetle Lucanus Cervus (Linnaeus, 1758) (Coleoptera, Lucanidae) Found in Norway
    © Norwegian Journal of Entomology. 5 June 2009 The stag beetle Lucanus cervus (Linnaeus, 1758) (Coleoptera, Lucanidae) found in Norway GÖRAN E. NILSSON, EMIL ROSSELAND & KARL ERIK ZACHARIASSEN Nilsson, G. E., Rosseland, E. & Zachariassen, K.E. 2009. The stag beetle Lucanus cervus (Linnaeus, 1758) (Coleoptera, Lucanidae) found in Norway. Norw. J. Entomol. 56, 9–12. A 35 mm long male specimen of the stag beetle Lucanus cervus (Linnaeus, 1758) was found at Øynesvann, AAY, in the early 1980ies. The specimen was sitting on the stump of a cut oak tree. The specimen has been kept well preserved in a small insect collection on a farm in the area since it was collected. The species is likely to have been overlooked in Norway. The explanation for this may be the fact that the forest area where the beetle was found is large, sparsely populated and poorly investigated. Another explaining factor is the fact that the biology of the species makes the beetles hard to find even in areas with good populations. Keywords: Stag beetle, Lucanus cervus, Lucanidae, Coleoptera, Norway Göran E. Nilsson, Physiology Programme, Department of Molecular Biosciences, University of Oslo, PO Box 1041, NO-0316 Oslo, Norway. E-mail: [email protected] Emil Rosseland, Grønnestølvn. 8, NO-5073 Bergen, Norway. E-mail: [email protected] Karl Erik Zachariassen, Department of Biology, Norwegian University of Science and Technology (NTNU), NO-7491 Trondheim, Norway. E-mail: [email protected] Introduction Bugge near Arendal. Since no specimen exists, even this claim has been considered too uncertain Several sources have indicated that the stag beetle to justify the listing of the stag beetle as occurring Lucanus cervus (Linnaeus, 1758) occurs in Norway.
    [Show full text]
  • Length Variation and Distribution of the Lesser Stag Beetle Dorcus Parallelipipedus (Coleoptera: Lucanidae)
    58 entomologische berichten 73 (2) 2013 Length variation and distribution of the lesser stag beetle Dorcus parallelipipedus (Coleoptera: Lucanidae) Paul Hendriks KEYWORDS Biometry, body length, sexual dimorphism Entomologische Berichten 73 (2): 58-67 The lesser stag beetle (Dorcus parallelipipedus) varies considerably in length. To learn more about this variation, an analysis was made of the length of 1282 individuals throughout its distribution range in Europe. Specimens were from museum collections and from populations. The length distribution of this beetle is clearly affected by sexual dimorphism, the males having larger mandibles than the females and thus greater lengths. Therefore, length distributions of this beetle were analyzed separately for males and females. The maximum and minimum lengths found in this study match with the lengths given in the literature. The information given in this study allows comparison of lengths of beetles under different (environmental) conditions or populations to its general distribution of lengths. Introduction D. parallelipipedus, but these data appeared not to be available. The lesser stag beetle, Dorcus parallelipipedus Linnaeus (fig- In various publications, minimum and maximum lengths were ures 1-2), occurs throughout nearly the whole of Europe, south- given, but these differed considerably (see table 5). The aim ern Scandinavia, Turkey and into southern Russia. The beetle of the current study was to provide a length distribution of lives in rotting wood (Klausnitzer 1995). Although related to D. parallelipipedus across Europe that will make it possible to the stag beetle, Lucanus cervus (Linnaeus), its appearance is far compare the lengths of reared and wild beetles, and to compare less impressive, being two to three centimeters long, uniformly the lengths of beetles from different populations or different black in colour and with much smaller mandibles.
    [Show full text]
  • Nansei Islands Biological Diversity Evaluation Project Report 1 Chapter 1
    Introduction WWF Japan’s involvement with the Nansei Islands can be traced back to a request in 1982 by Prince Phillip, Duke of Edinburgh. The “World Conservation Strategy”, which was drafted at the time through a collaborative effort by the WWF’s network, the International Union for Conservation of Nature (IUCN), and the United Nations Environment Programme (UNEP), posed the notion that the problems affecting environments were problems that had global implications. Furthermore, the findings presented offered information on precious environments extant throughout the globe and where they were distributed, thereby providing an impetus for people to think about issues relevant to humankind’s harmonious existence with the rest of nature. One of the precious natural environments for Japan given in the “World Conservation Strategy” was the Nansei Islands. The Duke of Edinburgh, who was the President of the WWF at the time (now President Emeritus), naturally sought to promote acts of conservation by those who could see them through most effectively, i.e. pertinent conservation parties in the area, a mandate which naturally fell on the shoulders of WWF Japan with regard to nature conservation activities concerning the Nansei Islands. This marked the beginning of the Nansei Islands initiative of WWF Japan, and ever since, WWF Japan has not only consistently performed globally-relevant environmental studies of particular areas within the Nansei Islands during the 1980’s and 1990’s, but has put pressure on the national and local governments to use the findings of those studies in public policy. Unfortunately, like many other places throughout the world, the deterioration of the natural environments in the Nansei Islands has yet to stop.
    [Show full text]
  • CISEC, the Insect Collection of Southern Ecuador by Aura Paucar-Cabrera1, 2, Diego Marín-Armijos1, Carlos Zaragoza1, Alberto Castro1 and Diana S
    SCARABS ad ta ha sp gi ai lt xh ky je uj dy Occasional Issue Number 75 Print ISSN 1937-8343 Online ISSN 1937-8351 September, 2014 Regional Variation of Dorcus titanus cas- WITHIN THIS ISSUE tanicolor (Motschulsky, 1861) (Coleop- Variation of Dorcus tita- nus castanicolor in South tera: Lucanidae) in Northern and Southern Korea ................................... 1 South Korea CISEC, the Insect Collec- tion of Southern Ecuador 7 by Jin Kim Insect Columnist & Species (insects) Identification Committee of BRIC The Scarab Collections Author of the Insect Book The First Encounter Insect Story at the Muséum d’Histoire Staff of Insects Exhibition Hall [Papillon Hall] in Yeosu City, S. Jeolla, South Korea Naturelle in Geneva, Swit- [email protected] zerland .............................. 12 http://blog.daum.net/titanusraiser European Congress of Dorcus titanus castanicolor is the largest and most aggressive species Entomology 2014 ........... 16 among the 17 species of Lucanidae in South Korea. Many amateur en- Jonathan Lai Book ......... 18 thusiasts rear the species due to easy rearing. Dorcus titanus castanicolor is distributed in Korea and Japan, and all the other subspecies of Dorcus titanus can be found throughout southeastern Asia. The subspecies in Korea is larger than the one found in Japan. BACK ISSUES Available At These Sites: Coleopterists Society www.coleopsoc.org/de- fault.asp?Action=Show_ Resources&ID=Scarabs University of Nebraska www-museum.unl.edu/ research/entomology/ Scarabs-Newsletter.htm EDITORS Rich Cunningham [email protected] Olivier Décobert [email protected] Photo 1: Dorcus titanus castanicolor (KOREA: S. Jeolla, Barney Streit Yeongam). barneystreit@hotmail. com However, there are morphological variations among the subspecies found in Korea.
    [Show full text]
  • Development and Characterization of Eleven Microsatellite Markers for A
    Int. J. Indust. Entomol. 35(2) 97-99 (2017) IJIE ISSN 1598-3579, http://dx.doi.org/10.7852/ijie.2017.35.2.97 Development and characterization of eleven microsatellite markers for a popular pet stag beetle, Dorcus hopei (Coleoptera, Lucanidae) using paired-end Illumina shotgun sequencing Taeman Han, Seung-Hyun Kim, In Gyun Park, and Haechul Park* Applied Entomology Division, Department of Agricultural Biology, National Institute of Agricultural Science, Nongsaengmyeong-ro 166, Iseo-myeon, Wanju-gun, Jeollabuk-do, 55365, Republic of KOREA Abstract Eleven polymorphic microsatellite loci were developed and characterized for Dorcus hopei Received : 12 Sep 2017 in this study. The number of alleles varied from 2 to 21. The observed heterozygosity Revised : 29 Sep 2017 and expected heterozygosity ranged from 0.1058 to 0.9744 and 0.0997 to 0.8941, Accepted : 17 Oct 2017 respectively. Two loci showed low polymorphism, while the rest were highly polymorphic. Keywords: Six loci deviated from Hardy-Weinberg Equilibrium. The set of markers will provide Dorcus hopei, effective tools for examining the population genetic structures and be helpful for managing Lucanidae, wild population in D. hopei. microsatellite, © 2017 The Korean Society of Sericultural Sciences genetic diversity, Int. J. Indust. Entomol. 35(2), 97-99 (2017) Korea Introduction Materials and Methods A stag beetle, Dorcus hopei belonging to the family Genomic DNA (gDNA) was extracted from thorax muscle Lucanidae is a famous insect pet and widely reared by many tissue of a wild male (voucher no. 8421, collecting date: 9th April insect fanciers between Korea and Japan. In Japan, to increase 2013) using a DNeasy Blood and Tissue kit (QIAGEN).
    [Show full text]
  • Dimensional Limits for Arthropod Eyes with Superposition Optics
    View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by Elsevier - Publisher Connector Vision Research 44 (2004) 2213–2223 www.elsevier.com/locate/visres Dimensional limits for arthropod eyes with superposition optics Victor Benno Meyer-Rochow a,*,Jozsef Gal b a School of Engineering and Sciences, International University Bremen (IUB), Campus Ring 6, Research II, D-28759 Bremen, Germany b Institute of Plant Biology, Biological Research Centre, Hungarian Academy of Sciences, Temesvari krt. 62, H-6701 Szeged, Hungary Received 10 December 2003; received in revised form 16 April 2004 Abstract An essential feature of the superposition type of compound eye is the presence of a wide zone, which is transparent and devoid of pigment and interposed between the distal array of dioptric elements and the proximally placed photoreceptive layer. Parallel rays, collected by many lenses, must (through reflection or refraction) cross this transparent clear-zone in such a way that they become focused on one receptor. Superposition depends mostly on diameter and curvature of the cornea, size and shape of the crystalline cone, lens cylinder properties of cornea and cone, dimensions of the receptor cells, and width of the clear-zone. We examined the role of the latter by geometrical, geometric-optical, and anatomical measurements and concluded that a minimal size exists, below which effective superposition can no longer occur. For an eye of a given size, it is not possible to increase the width of the clear-zone cz ¼ dcz=R1 and decrease R2 (i.e., the radius of curvature of the distal retinal surface) and/or c ¼ dc=R1 without reaching a limit.
    [Show full text]
  • Complete Mitochondrial Genome of Prismognathus Prossi (Coleoptera: Lucanidae) with Phylogenetic Implications
    © Entomologica Fennica. 10 July 2019 Complete mitochondrial genome of Prismognathus prossi (Coleoptera: Lucanidae) with phylogenetic implications Jing Liu, Yuyan Cao, Shiju Zhou, Yongjing Chen & Xia Wan* Liu, J., Cao, Y.Y.,Zhou, S.J., Chen, Y.J. & Wan, X. 2019: Complete mitochondrial genome of Prismognathus prossi (Coleoptera: Lucanidae) with phylogenetic im- plications. — Entomol. Fennica 30: 90–96. https://doi.org/10.33338/ef.82927 The complete mitochondrial genome of a Chinese stag beetle, Prismognathus prossi, was generated using the Illumina next-generation sequencing. The mito- genome sequence is 15,984 bp in length, the nucleotide composition is A 36.6%, C 17.5%, T 34.3% and G 11.6% with the AT-content of 70.9%. The sequence has similar features with other reported insect mitogenomes, consisting of 13 protein- coding genes (PCGs), 22 transfer RNAgenes, two ribosomal RNAs and a control region. All of the protein-coding genes start with the typical ATN initiation codon except for COI. Maximum Likelihood (ML) and Bayesian Inference (BI) indi- cated that P. prossi share an affinity with Lucanus mazama, Lucanus fortunei and Cyclommatus vitalisi. J. Liu, Y.Y. Cao, S.J. Zhou, Y.J. Chen & X. Wan, Department of Ecology, School of Resources and Engineering, Anhui University, Anhui, Hefei, 23000, China. E-mails: Jing Liu: [email protected]; Yuyan Cao: 1210252162@163. com; Shiju Zhou: [email protected]; Yongjing Chen: cyj1452394259 @163.com: Xia Wan (* corresponding author): [email protected] Received 28 February 2018, accepted 13 September 2018 1. Introduction (Sheffield et al. 2009, Kim et al. 2013, Wu et al.
    [Show full text]
  • Romanian Species of Lucanids (Coleoptera: Scarabaeoidea: Lucanidae) in the Collections of “Grigore Antipa” National Museum of Natural History MELANIA STAN
    Travaux du Muséum National d’Histoire Naturelle © 30 décembre «Grigore Antipa» Vol. LVI (2) pp. 173–184 2013 DOI: 10.2478/travmu-2013-0013 ROMANIAN SPECIES OF LUCANIDS (COLEOPTERA: SCARABAEOIDEA: LUCANIDAE) IN THE COLLECTIONS OF “GRIGORE ANTIPA” NATIONAL MUSEUM OF NATURAL HISTORY MELANIA STAN Abstract. The seven species of stag beetles of the Romanian fauna are present in the coleopteran collection of the Museum: Aesalus scarabaeoides scarabaeoides (Panzer), Ceruchus chrysomelinus (Hochenwarth), Sinodendron cylindricum (Linnaeus), Lucanus cervus cervus (Linnaeus), Platycerus caraboides caraboides (Linnaeus), Platycerus caprea (De Geer) and Dorcus parallelipipedus (Linnaeus). Information on the collecting data and distribution maps are given for each species. We present the male and female habitus for the two species of Platycerus. Résumé. Les sept espèces de lucanes de la faune de Roumanie sont présentes dans la collection des coléoptères du muséum: Aesalus scarabaeoides scarabaeoides (Panzer), Ceruchus chrysomelinus (Hochenwarth), Sinodendron cylindricum (Linnaeus), Lucanus cervus cervus (Linnaeus), Platycerus caraboides caraboides (Linnaeus), Platycerus caprea (De Geer) et Dorcus parallelipipedus (Linnaeus). On donne des informations sur les données de la capture et les cartes de distribution pour chaque espèce. Nous présentons les photos de l’habitus mâle et femelle pour les deux espèces de Platycerus. Key words: Coleoptera, Lucanidae, Romania, collections, “Grigore Antipa” National Museum of Natural History. INTRODUCTION From the 17 stag beetle species and subspecies of Europe, in the Romanian fauna there are only seven species: Aesalus scarabaeoides scarabaeoides (Panzer), Ceruchus chrysomelinus (Hochenwarth), Sinodendron cylindricum (Linnaeus), Lucanus cervus cervus (Linnaeus), Platycerus caraboides caraboides (Linnaeus), Platycerus caprea (De Geer) and Dorcus parallelipipedus (Linnaeus), included in four subfamilies, according to the Catalogue of the Palaearctic Coleoptera (Bartolozzi & Sprecher-Uebersax, 2006).
    [Show full text]