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Xylocopa violacea

About: Xylocopa violacea is a research topic. Over the lifetime, 23 publications have been published within this topic receiving 209 citations. The topic is also known as: violet carpenter bee & Carpenter bee.

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01 Jan 2019
TL;DR: A frequent solitary bee, Xylocopa violacea, that thanks to its large size and its feeding preferences can visit many types of flowers, selectively visits flowering plant species at the botanic garden, preferring Lamiaceae and bilabiate flower types on which legitimate or illegitimate visits can be performed.
Abstract: Abstract: We assessed the interactions between aromatic and ornamentals plants and local pollinators in a botanic garden. We focused our attention on a frequent solitary bee, Xylocopa violacea, that thanks to its large size and its feeding preferences can visit many types of flowers. By conducting linear walking transects, we recorded all flower visits by bees, highlighting those of X. violacea. We analysed bee preferences in terms of plant family, plant origin or flower morphology. We also identified plant species that were visited by X. violacea together with other foraging bees. Results indicated that X. violacea selectively visits flowering plant species at the botanic garden, preferring Lamiaceae and bilabiate flower types on which legitimate or illegitimate visits can be performed. Other bee species do concurrently visit the same plants, and in the future studies on competition, resource exploitation and pollination success will be addressed.
DOI
12 Oct 2016
TL;DR: The Xylocopini (Apidae) contained in the collection of Entomological Institute of Bari University are 54 as follows: 41 specimens belonging to X. viola- cea, 9 of X. iris, 3 for X. valga and 1 belonging to S. aestuans as mentioned in this paper.
Abstract: XYLOCOPINI (HYMENOPTERA: APIDAE: XYLOCOPINAE) CONTAINED IN THE ITALIAN ENTOMOLOGICAL COLLECTIONS: THE ENTOMOLOGICAL INSTITUTE OF BARI UNIVERSITY The specimens of Xylocopini tribe (Apidae) contained in the collection of Entomological Institute of Bari University are 54 as follows: 41 specimens belonging to Xylocopa violacea, 9 ones to X. iris, 3 ones to X. valga and 1 belonging to X. aestuans. For X. violacea the following fauni- stic records for Apulia are new: Bari, Altamura (BA), Bitetto (BA), Bosco di Acquatetta of Minervino Murge (BA), Mola di Bari (BA), Rutigliano (BA), Ostuni (BR), Otranto (LE), S. Domino, Tremiti Islands (FG), Carpino (FG), Lecce, Castellaneta (TA); for X. iris instead are, Bosco di Acquatetta of Minervino Murge (BA) only. There is none faunistic record for X. valga in Apulia. Key words: Xylocopini, Bari Entomological Collection, Apulia, Xylocopa violacea, Xylocopa iris. La collezione dell’Istituto di Entomologia agraria di Bari conta 54 esemplari di Xylocopini (Apidae) cosi suddivisi: 41 esemplari di Xylocopa violacea, 9 di X. iris, 3 di X. valga ed 1 esemplare di X. aestuans. Le seguenti localita pugliesi rappresentano nuove segnalazioni per X. viola- cea: Bari, Altamura (BA), Bitetto (BA), Bosco di Acquatetta di Minervino Murge (BA), Mola di Bari (BA), Rutigliano (BA), Ostuni (BR), Otranto (LE), S. Domino, Isole Tremiti (FG), Carpino (FG), Lecce, Castellaneta (TA); per X. iris invece, Bosco di Acquatetta di Minervino Murge (BA). X. valga risulta ancora non segnalata in Puglia. Parole chiave: Xylocopini, Collezione Entomologica di Bari, Puglia, Xylocopa violacea, Xylocopa iris.
DOI
30 Sep 2016
TL;DR: The main conclusion is that it is necessary to reconsider the whole life cycle of X. violacea, by carrying out further investigations on the life of the founder female after the nest has been completed, as well as on the fecundity of the Xylocopini species from the evolutionary standpoint.
Abstract: The present paper aims to find an explanation for the presence of exceptionally long and branched nests in the Xylocopini species. Two giant nests of Xylocopa violacea (L., 1758), excavated in a Prunus persica trunk, were found in 1994: M94/1 and M94/2. The former was formed by seven tunnels, four of which were ascending and 111 mm in average length, and 3 were descending and 108 mm in average length; the total length of the nest was 795 mm. M94/2 showed 9 tunnels, 7 of them were ascending and 98 mm in average length, and 2 were descending and 66 mm in average length; the total length of the nest was 856 mm. Nests of similar or slightly larger sizes have been reported for X. frontalis (social and multivoltine), X. hirsutissima (social and multivoltine), X. subvirescens and Lestis bombylans (communal nesting and multivoltine). Giant nests are common in both social and multivoltine species, since the founder female is helped by the daughters of the 1st generation in the construction of the cells of the 2nd generation, nest lengthening, and even oviposition. Moreover, the nest can be reused for several years and therefore subjected to further lengthening. The explanation for these two giant nests is not simple for the following reasons: 1) X. violacea is considered by all the authors as univoltine and solitary without any mother-daughters interaction; 2) the M94 nests were excavated in 1994, and therefore cannot be the result of lengthening due to its reuse; 3) the M94 nests had an entrance each, and therefore cannot be the fortuitous, or otherwise, result of the mergence of two or more nests. Therefore, five hypotheses are here formulated, based on my 10-year observations and literature data on this and other co-generic species. The main conclusion is that it is necessary to reconsider the whole life cycle of X. violacea, by carrying out further investigations on the life of the founder female after the nest has been completed, as well as on the fecundity of the Xylocopini species from the evolutionary standpoint. Key Words: Nest-morphometrics, giant branched-nest, Xylocopini, Southern-Italy, Apidae. BIOLOGIA DI XYLOCOPA (XYLOCOPA) VIOLACEA, (L., 1758): NIDI GIGANTI! (HYMENOPTERA: APIDAE) Oggetto di questo studio e quello di trovare una spiegazione alla presenza di nidi eccezionalmente ramificati e lunghi nelle specie della tribu Xylocopini in seguito al ritrovamento di due nidi giganti in X. violacea nel 1994, scavati in un tronco di Prunus persica: M94/1 e 2. Il primo e dotato di 7 tunnel, di cui 4 ascendenti con una lunghezza media di 111 mm e 3 discendenti aventi una lunghezza media di 108 mm; la lunghezza totale del nido era di 795 mm. M94/2 e dotato di 9 tunnel, 7 ascendenti con una lunghezza media di 98 mm, e 2 discendenti con una lunghezza media di 66 mm; la lunghezza totale del nido era di 856 mm. Nidi di dimensioni simili o di poco maggiori sono stati riportati per X. frontalisi, X. hirsutissima e Lestis bombylans (comu- nali e multivoltine) e X. subvirescens. Per le specie sia sociali che multivoltine l’esistenza di nidi giganti e normale in quanto la fondatrice viene coadiuvata dalle figlie della I generazione nella costruzione delle celle della II generazione, per lo scavo del nido (ampliamento) ed anche nella deposizione delle uova. Inoltre il nido puo essere usato per vari anni e quindi soggetto ad ulteriore ampliamento. I due nidi giganti M94 di X. violacea non trovano una semplice spiegazione per i seguenti motivi: 1) X. violacea e ritenuta da tutti gli autori univoltina e solitaria, senza interazione madre-figlie; 2) M94 non sono il frutto di ampliamenti dovuti al riuso; 3) M94 non sono il risultato casuale o non della fusione di due o piu nidi. Vengono, per questi motivi, effettuate 5 ipotesi e vengono portati dati pro e contro di esse derivanti da 10 anni di studi su X. violacea e dalla letteratura disponibile sugli Xylocopini. La principale conclusione e che e necessaria una rivisitazione dell’intero ciclo vitale di X. violacea, di un’indagine sulla vita della fondatrice dopo l’ultimazione del nido (aspetto totalmente trascurato in bibliografia) e di un esteso studio sulla fecondita delle specie di Xylocopini in chiave evolutiva. Parole Chiave: Xylocopa violacea, morfometria nidi, nidi ramificati giganti, nidi giganti di Xylocopini, Sud-Italia.
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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20212
20201
20193
20164
20151
20101