FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2531357963> ?p ?o ?g. }

• W2531357963 startingPage "12" @default.
• W2531357963 abstract "—Cicada orni Linnaeus is among the most common and widespread cicadas in Portugal, and, unless a critical study of the male genitalia is made, it is easily confused with the much less widely distributed C. barbara lusitanica Boulard. These species are morphologically very similar and sometimes difficult to separate using existing keys. This study attempts to test the discriminating capabilities of numerical techniques commonly used for classifica tory purposes, as well as to discover the most effective characters to distinguish between the two species. For these purposes, cluster analysis and principal component analysis were applied to a sample of 64 male specimens character ized by 40 characters (33 derived from the external morphology and 7 from genitalia). In WPGMA cluster analysis, product-moment correlations gave a better separation between these species than did taxonoinic distance coefficients; moreover, the analysis derived from the genital characters alone gave better separation than the analyses based on the 33 external characters. Principal component analysis yielded a clear, interspecific separation along the first axis. The best characters to discriminate between males of the two species were the lengths of the pygofer (and its dorsal spine), the tenth abdominal segment, and the appendages of the latter (which are smaller in barbara lusitanica), as well as the width of the shaft of the aedeagus (thinner in orni)' Finally, the uniformity of the general clustering pattern resulting from the two multivariate techniques suggests the presence of two distinct species, as also clearly indicated by behavioral data. Cicada orni Linnaeus is among the most common and widespread cicadas in Portugal, and, unless a critical study of the male geni talia is made, it is easily confused with the much less widely distributed C. barbara lusi tanica Boulard (Quartau and Fonseca 1988). As live specimens, however, they are easily distinguished by the male calling songs, which are quite distinct. Oscillograms are found in Claridge et al. (1979) and Boulard (1982), respectively, for C. orni and C. bar bara lusitanica. The two species are externally very similar and sometimes even difficult to separate by existing keys (e.g., Gomez-Menor 1957). In fact, the main distinguishing character used for their separation has been the presence in barbara of only two spots on the cross-veins of the forewings instead of four; however, some specimens of barbara lusitanica have the full four spots as they occur in orni (Fig. 4). Boulard (1982), when describing the Por tuguese form of C. barbara, which he origi nally named lusitanica, provided a good diag nosis of the genital characters of this species. However, no detailed comparison of the two sp cies has been made, nor has any type of multiple-character analysis involving the simu taneous use of several measurements or counts been attempted. It was felt of interest, therefore, to see how far some common tech niques of numerical taxonomy would discrim inate between this pair of closely related spe cies. This study was undertaken with two main objectives in mind. The first was to apply current techniques of numerical taxonomy commonly used for classificatory purposes with the aim of testing their general discrimi nating power with respect to these two spe cies. The techniques chosen were a form of hierarchical cluster analysis and principal component analysis. It is known that apart from the explicit use of the former, principal component analysis can also serve as a cluster technique of great generality and can be used to distinguish pairs of putative morphs as in the classical study of Temple (1968). The sec ond objective was to discover new characters that might help to separate C. orni from C. barbara. ^epto. de Zoologia e Antropologia, Faculdade de Ciencias de Lisboa, 1200 Lisboa, Portugal." @default.
• W2531357963 created "2016-10-21" @default.
• W2531357963 creator A5024540077 @default.
• W2531357963 date "1988-01-01" @default.
• W2531357963 modified "2023-09-23" @default.
• W2531357963 title "A numerical taxonomic analysis of interspecific morphological differences in two closely related species of Cicada (Homoptera, Cicadidae) in Portugal" @default.
• W2531357963 hasPublicationYear "1988" @default.
• W2531357963 type Work @default.
• W2531357963 sameAs 2531357963 @default.
• W2531357963 citedByCount "1" @default.
• W2531357963 crossrefType "journal-article" @default.
• W2531357963 hasAuthorship W2531357963A5024540077 @default.
• W2531357963 hasConcept C105702510 @default.
• W2531357963 hasConcept C105795698 @default.
• W2531357963 hasConcept C140530291 @default.
• W2531357963 hasConcept C18903297 @default.
• W2531357963 hasConcept C22508944 @default.
• W2531357963 hasConcept C2524010 @default.
• W2531357963 hasConcept C27438332 @default.
• W2531357963 hasConcept C2776988988 @default.
• W2531357963 hasConcept C2780861071 @default.
• W2531357963 hasConcept C33923547 @default.
• W2531357963 hasConcept C41451933 @default.
• W2531357963 hasConcept C58642233 @default.
• W2531357963 hasConcept C59822182 @default.
• W2531357963 hasConcept C63644423 @default.
• W2531357963 hasConcept C75119304 @default.
• W2531357963 hasConcept C86803240 @default.
• W2531357963 hasConcept C90856448 @default.
• W2531357963 hasConceptScore W2531357963C105702510 @default.
• W2531357963 hasConceptScore W2531357963C105795698 @default.
• W2531357963 hasConceptScore W2531357963C140530291 @default.
• W2531357963 hasConceptScore W2531357963C18903297 @default.
• W2531357963 hasConceptScore W2531357963C22508944 @default.
• W2531357963 hasConceptScore W2531357963C2524010 @default.
• W2531357963 hasConceptScore W2531357963C27438332 @default.
• W2531357963 hasConceptScore W2531357963C2776988988 @default.
• W2531357963 hasConceptScore W2531357963C2780861071 @default.
• W2531357963 hasConceptScore W2531357963C33923547 @default.
• W2531357963 hasConceptScore W2531357963C41451933 @default.
• W2531357963 hasConceptScore W2531357963C58642233 @default.
• W2531357963 hasConceptScore W2531357963C59822182 @default.
• W2531357963 hasConceptScore W2531357963C63644423 @default.
• W2531357963 hasConceptScore W2531357963C75119304 @default.
• W2531357963 hasConceptScore W2531357963C86803240 @default.
• W2531357963 hasConceptScore W2531357963C90856448 @default.
• W2531357963 hasIssue "1" @default.
• W2531357963 hasLocation W25313579631 @default.
• W2531357963 hasOpenAccess W2531357963 @default.
• W2531357963 hasPrimaryLocation W25313579631 @default.
• W2531357963 hasRelatedWork W1535864698 @default.
• W2531357963 hasRelatedWork W1614355429 @default.
• W2531357963 hasRelatedWork W1969610876 @default.
• W2531357963 hasRelatedWork W1973220369 @default.
• W2531357963 hasRelatedWork W1976414430 @default.
• W2531357963 hasRelatedWork W1980444200 @default.
• W2531357963 hasRelatedWork W2039025043 @default.
• W2531357963 hasRelatedWork W2045479966 @default.
• W2531357963 hasRelatedWork W2061608093 @default.
• W2531357963 hasRelatedWork W2101349590 @default.
• W2531357963 hasRelatedWork W2104026990 @default.
• W2531357963 hasRelatedWork W2141202672 @default.
• W2531357963 hasRelatedWork W2152687070 @default.
• W2531357963 hasRelatedWork W2162689829 @default.
• W2531357963 hasRelatedWork W2317900858 @default.
• W2531357963 hasRelatedWork W2319321697 @default.
• W2531357963 hasRelatedWork W2322352742 @default.
• W2531357963 hasRelatedWork W2327134374 @default.
• W2531357963 hasRelatedWork W2376341375 @default.
• W2531357963 hasRelatedWork W2406746009 @default.
• W2531357963 hasVolume "12" @default.
• W2531357963 isParatext "false" @default.
• W2531357963 isRetracted "false" @default.
• W2531357963 magId "2531357963" @default.
• W2531357963 workType "article" @default.