scholarly journals Revision of the larval morphology (Zoea I) of the family Hippolytidae (Decapoda, Caridea), with a description of the first stage of the shrimp Hippolyte obliquimanus Dana, 1852

Zootaxa ◽  
2010 ◽  
Vol 2624 (1) ◽  
pp. 49 ◽  
Author(s):  
MARIANA TEROSSI ◽  
JOSE A. CUESTA ◽  
INGO S. WEHRTMANN ◽  
FERNANDO L. MANTELATTO
Keyword(s):  
Costa Rica ◽  
Intraspecific Variability ◽  
Morphological Characters ◽  
Costa Rican ◽  
Zoeal Stage ◽  
Morphological Aspect ◽  
Ventral Margin ◽  
Larval Morphology ◽  
Anal Spine ◽  
The Family

The aim of this study was to summarize the available data on larval morphology of the first zoea of the family Hippolytidae and describe the first zoeal stage of H. obliquimanus from two geographically distinct populations, Brazilian and Caribbean in order to discuss interand intraspecific variability. Ovigerous females of Hippolyte obliquimanus were collected at Cahuita (Limón, Costa Rica) and at Ubatuba (São Paulo, Brazil). We compiled the published descriptions of all available hippolytid Zoea I (66 spp., 21%), and all zoeae share several characteristics. However, such morphological features cannot be used to distinguish the first zoeae of Hippolytidae from other caridean larvae. Historically, the presence of an exopodal seta at the maxillule and the absence of the anal spine/papilla have been considered as characteristic for the Zoea I of the genus Hippolyte. The results of our revision, however, did not support these conclusions: although H. obliquimanus showed an exopodal seta at the maxillule, four congeners did not bear such structure; moreover, H. obliquimanus as well as one other congener have an anal spine/papilla. All morphological characters observed in the first zoeal stage of H. obliquimanus are shared with others species of the family Hippolytidae. Intraspecific variability in Hippolyte obliquimanus was detected in one morphological aspect: the first zoea had four denticles on the ventral margin of the carapace in the Brazilian population, while specimens from the Costa Rican population had three.

The first zoeal stage of the yellow land crab Johngarthia lagostoma (Milne Edwards, 1837) (Decapoda: Brachyura: Gecarcinidae)

Zootaxa ◽  
2021 ◽  
Vol 4990 (1) ◽  
pp. 192-200
Author(s):  
SIMONE MARIA DE ALBUQUERQUE LIRA ◽  
CYNTHIA DAYANNE MELLO DE LIMA ◽  
IGOR DE ÁVILA TEIXEIRA ◽  
RALF SCHWAMBORN
Keyword(s):  
Phylogenetic Relationships ◽  
Zoeal Stage ◽  
Dorsal Seta ◽  
Tropical Atlantic ◽  
Larval Morphology ◽  
Land Crab ◽  
The Family ◽  
Fernando De Noronha ◽  
Morphological Differences

The objective of this paper is to describe and illustrate the first zoeal stage of the largest land crab of the Tropical Atlantic, Johngarthia lagostoma (Milne Edwards, 1837) (Brachyura: Gecarcinidae). A larval description of J. lagostoma was previously not available. Larvae were obtained from ovigerous females on Rocas Atoll and Fernando de Noronha Archipelago, Brazil. Twenty larvae were randomly chosen to be dissected and described in detail, while 40 others (20 larvae from each island) were measured only. The published description of the congener J. planatus (Stimpson, 1860) larvae was used for a comparison of larval morphology. Some morphological differences between the first zoeal stage of these two species were: The absence or presence of a simple shorter seta on antennule, number of the minute terminal spines on the antenna, setation of the coxal endite of the maxilla, exopod unsegmented of the first and second maxilliped, and a single mid-dorsal seta on first pleonite. These results and differences observed between these species can assist in studies on phylogenetic relationships within the Family Gecarcinidae MacLeay, 1838, as well as in the identification of the larvae of J. Lagostoma in plankton samples from the tropical Atlantic.  

Pseudaphelenchus yukiae n. gen., n. sp. (Tylenchina: Aphelenchoididae) associated with Cylindrotermes macrognathus (Termitidae: Termitinae) in La Selva, Costa Rica

Nematology ◽  
2009 ◽  
Vol 11 (6) ◽  
pp. 869-881 ◽  
Author(s):  
Natsumi Kanzaki ◽  
Robin M. Giblin-Davis ◽  
Rudolf H. Scheffrahn ◽  
Barbara J. Center ◽  
Kerrie A. Davies
Keyword(s):  
Costa Rica ◽  
New Genus ◽  
Morphological Characters ◽  
Subterranean Termite ◽  
La Selva ◽  
The Family ◽  
Phylogenetic Status ◽  
Molecular Phylogenetic ◽  
Definition Of ◽  
Ribosomal Dna Sequence

Abstract A species of aphelenchoidid nematode was isolated from a subterranean termite, Cylindrotermes macrognathus, during a survey of termite-associated nematodes in a conserved forest in La Selva, Costa Rica. The nematode was morphologically intermediate between the families Aphelenchidae and Aphelenchoididae, i.e., the nematode had a true bursa supported by bursal limb-like genital papillae but lacked a clear pharyngeal isthmus. The molecular phylogenetic status of the new nematode among tylenchid, cephalobid, panagrolaimid, aphelenchid and aphelenchoidid genera was analysed based on ca 1.2 kb of SSU ribosomal DNA sequence and the inferred position was basal to the family Aphelenchoididae. It was clearly not part of the clade containing the genus Aphelenchus (=Aphelenchidae). This nematode is described herein as Pseudaphelenchus yukiae n. gen., n. sp., and the family definition of Aphelenchoididae is emended to include the unique morphological characters of this new genus. The molecular phylogenetic analysis supported the paraphyly of the three Aphelenchoidinae genera Aphelenchoides, Laimaphelenchus and Schistonchus and the monophyly of Ektaphelenchinae, Seinura (Seinurinae) and Noctuidonema (Acugutturinae). However, many more representatives are needed to resolve the family-genus level phylogeny of Aphelenchoididae.

scholarly journals The first larval stage (Zoea I) description of the caridean shrimp Ogyrides occidentalis (Ortmann, 1893) (Alpheoidea: Ogyrididae) reveals congruence with taxonomic status

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
João Alberto Farinelli Pantaleão ◽  
Fernando Luis Mantelatto ◽  
Rogério Caetano Costa
Keyword(s):  
Larval Stage ◽  
Taxonomic Status ◽  
Morphological Characters ◽  
Sao Paulo ◽  
Zoeal Stage ◽  
Ecological Research ◽  
Larval Morphology ◽  
Previous Description ◽  
Caridean Shrimp ◽  
Additional Information

Abstract: A complete and detailed description of the first zoeal stage of Ogyrides occidentalis is provided. Larvae were obtained in the laboratory from a female with embryos collected in Ubatuba, State of São Paulo, Brazil. The morphological characters are compared with previous description of the close related O. alphaerostris. Despite of some similarities (number of appendages, pleonites, and setae on the majority of appendages) substantial differences were found between the two species, as the size of larvae and rostrum and segmentation of some structures (antenna exopod, first maxilliped coxa and basis). However, these differences must be interpreted carefully because larval description of O. alphaerostris was conducted before the proposed standardization for decapod larval morphology descriptions. The present larval description furnished additional information to corroborate the recent resurrection of O. occidentalis and will be useful for future comparative and ecological research.

Larval development and first crab of Mithraculus sculptus (Decapoda: Brachyura: Majoidea: Mithracidae) described from laboratory-reared material

2006 ◽  
Vol 86 (5) ◽  
pp. 1133-1147 ◽  
Author(s):  
Andrew L. Rhyne ◽  
Yoshihisa Fujita ◽  
Ricardo Calado
Keyword(s):  
Larval Development ◽  
Distal Segment ◽  
Morphological Characters ◽  
Zoeal Stage ◽  
Distal Margin ◽  
Larval Morphology ◽  
Future Studies ◽  
Morphological Differences ◽  
Simple Seta ◽  
Complex Display

The present work describes the complete larval development of Mithraculus sculptus (two zoeal stages, the megalopa) and the first crab instar from laboratory cultured material. The larval morphology is compared with other descriptions currently available for the Mithrax–Mithraculus complex: Mithraculus coryphe, M. forceps, Mithrax hispidus, M. pleuracanthus, M. spinosissimus and M. verrucosus. Although the different species of the Mithrax–Mithraculus complex display uniform morphological characters, the first zoeal stage of M. sculptus differs from other species in the setal meristics of the carapace and the number of aesthetascs of the antennule. The second zoeal stage differs in the number of aesthetascs of the antennule and the number of setae in the distal margin of the coxal endite of the maxillule. The megalopa of M. sculptus can be distinguished by the presence of 3–4 aesthetascs and a simple seta in the distal segment of the antennule. The morphological differences between the larvae from the genus Mithrax and Mithraculus are insufficient to support the separation of the two genera using adult morphology. Future studies should address in detail setal meristics.

Neotropical Rubiaceae: Synthesis of Chromosome Data from Costa Rican Taxa, with Insights on the Systematics of the Family

2020 ◽  
Vol 105 (4) ◽  
pp. 423-458
Author(s):  
Michael Kiehn ◽  
Andreas Berger
Keyword(s):  
Costa Rica ◽  
Current Knowledge ◽  
Costa Rican ◽  
Basic Information ◽  
Chromosome Counts ◽  
Molecular Systematic ◽  
Plant Family ◽  
The Family ◽  
Infraspecific Taxa ◽  
Systematic Framework

Recent molecular systematic studies have significantly improved our understanding of the large, complex, and cosmopolitan plant family Rubiaceae, comprising about 13,000 species. Besides the obvious importance of DNA phylogenetic data, cytological studies have long added important basic information on the circumscription of clades and relationships within the family. In light of recent changes affecting a large number of tribes and genera, the current knowledge on the systematics of Neotropical Rubiaceae is reviewed with a focus on Costa Rica, which harbors an exceptionally rich Rubiaceae flora including most of the genera and biogeographic elements present in the Neotropics. Based on this systematic framework, previously published chromosome counts on Costa Rican taxa are reviewed and 49 new chromosome counts are reported. In total, 110 accessions of 75 species or infraspecific taxa representing 36 genera of Costa Rican Rubiaceae are discussed and supplemented by new counts for extraterritorial taxa when appropriate. Altogether the present study includes the first chromosome counts reported for the tribes Cordiereae and Hillieae, as well as for 10 genera and 27 species, providing new aspects of Rubiaceae systematics.

Evaluating the consistency and taxonomic importance of cheliped and other morphological characters that potentially allow identification of species of the genus Perisesarma De Man, 1895 (Brachyura, Sesarmidae)

Crustaceana ◽  
2015 ◽  
Vol 88 (10-11) ◽  
pp. 1079-1095 ◽  
Author(s):  
Adnan Shahdadi ◽  
Christoph D. Schubart
Keyword(s):  
Intraspecific Variability ◽  
Morphological Characters ◽  
Species Level ◽  
Gastric Mill ◽  
Diagnostic Features ◽  
The Family ◽  
Taxonomic Importance ◽  
Identification Of Species ◽  
De Man ◽  
Key Characters

Recent studies suggest that the family Sesarmidae represents a monophyletic taxon, but within-family taxonomy and phylogenetic relationships need to be resolved. One of the most speciose and taxonomically complex genera of this family isPerisesarma. Only a few characters allow to discriminate between species of this genus. Among them, the number and shape of male dactylar tubercles and number of teeth of the pectinated crests are the main diagnostic features. A review of these key characters indicates some intraspecific variability which sometimes renders identification difficult. The present study shows that male dactylar tubercles and pectinated crests are in principle good diagnostic characters at species level in the genusPerisesarma, but in several cases show some overlap among species, due to intraspecific variability. New morphological characters should be considered, but in this study we show that the morphology of gonopods and the gastric mill are not informative enough for identification.

First zoeal stage morphology of Alpheus carlae and A. intrinsecus (Decapoda, Caridea, Alpheidae) obtained in the laboratory

2020 ◽  
Vol 100 (6) ◽  
pp. 949-961
Author(s):  
João Alberto Farinelli Pantaleão ◽  
Régis Augusto Pescinelli ◽  
Rogério Caetano Costa ◽  
Jose A. Cuesta ◽  
Fernando Luis Mantelatto
Keyword(s):  
Species Complex ◽  
Morphological Characteristics ◽  
Intraspecific Variability ◽  
Quantitative Comparison ◽  
Zoeal Stage ◽  
The Other ◽  
Morphological Description ◽  
Larval Morphology ◽  
Number Of Species ◽  
Snapping Shrimps

AbstractThe first zoeal stages of the snapping shrimps Alpheus carlae and A. intrinsecus from Brazil were obtained from laboratory-hatched specimens and a detailed morphological description is provided. The morphological characteristics of both species are compared with available descriptions of other Alpheus species with a known first zoeal stage. Remarks from a semi-quantitative comparison of species belonging to A. armillatus species complex (A. carlae and A. brasileiro) and a comparison between larvae of A. intrinsecus from two localities in Brazil are presented. It was possible to distinguish first zoea of both species from the other congeners based on morphology. No intraspecific variability was detected between A. intrinsecus larvae obtained from two locations. Some structures showed differences between species of the A. armillatus complex. However, generalizations and conclusions based on larval morphology for taxonomic rearrangements at this point need to be made with caution and accuracy, since data of a sufficient number of species are not yet available for comparison.

A revision of Bittacomorphinae with a review of the monophyly of extant subfamilies of Ptychopteridae (Diptera)

Zootaxa ◽  
2017 ◽  
Vol 4309 (1) ◽  
pp. 1 ◽  
Author(s):  
ANDREW FASBENDER ◽  
GREGORY W. COURTNEY
Keyword(s):  
Costa Rica ◽  
Phylogenetic Relationships ◽  
Morphological Characters ◽  
Neotropical Region ◽  
Monophyletic Group ◽  
Coast Range ◽  
Olympic Peninsula ◽  
World Species ◽  
The Family ◽  
The World

The phylogenetic relationship between the two extant subfamilies of Ptychopteridae is examined using morphological characters. Bittacomorphinae is supported as a monophyletic group with several synapomorphies. Monophyly of the Ptychopterinae is less certain. Descriptions are provided for the family and subfamilies. The genera and species of Bittacomorphinae are reviewed, and phylogenetic relationships within the subfamily are discussed. While Bittacomorpha is a monophyletic group, Bittacomorphella is probably paraphyletic. Redescriptions of the species of Bittacomorpha and most of Bittacomorphella are presented. Bittacomorphella furcata sp. nov, is described from the central Coast Range of Oregon and Olympic Peninsula of Washington, USA. The range of Bittacomorphinae is found to extend into the Neotropical region with a record of Bittacomorpha clavipes from Costa Rica. A key to the world species of Bittacomorphinae is provided. Printed copy of this book is available from US$25.8 plus postage, Click here to order.

scholarly journals Morphology of the second zoeal stage of Grapsus adscensionis (Osbeck, 1765) (Crustacea, Decapoda, Grapsoidea) confirms larval characters of the family Grapsidae

Zootaxa ◽  
2012 ◽  
Vol 3540 (1) ◽  
pp. 59 ◽  
Author(s):  
JOSÉ MARÍA LANDEIRA ◽  
JOSÉ A. CUESTA
Keyword(s):  
Canary Islands ◽  
Phylogenetic Relationships ◽  
Zoeal Stage ◽  
Larval Morphology ◽  
Ne Atlantic ◽  
Gran Canaria ◽  
The Family ◽  
First Time

The morphology of the second zoeal stage of Grapsus adscensionis, hatched from ovigerous specimens collected in the supralittoral zone of Taliarte Harbour, Gran Canaria (Canary Islands, NE Atlantic), is described and illustrated in detail for the first time. The comparison of its larval morphology with those of other species of Grapsidae provides information for the characterization of the zoeal morphology of grapsids, with implications in the phylogenetic relationships within the family, as well as an aid in identification of plankton samples.

Chewing lice of genus Myrsidea (Phthiraptera: Menoponidae) from Turdidae (Passeriformes) of Costa Rica, with descriptions of seven new species

Zootaxa ◽  
2013 ◽  
Vol 3620 (2) ◽  
pp. 201-222 ◽  
Author(s):  
FILIP KOUNEK ◽  
OLDRICH SYCHRA ◽  
MIROSLAV CAPEK ◽  
IVAN LITERAK
Keyword(s):  
New Species ◽  
Costa Rica ◽  
Bird Species ◽  
Costa Rican ◽  
Undescribed Species ◽  
Chewing Lice ◽  
The Family ◽  
Unidentified Species

A total of 166 individuals from 10 bird species belonging to the family Turdidae were examined for chewing lice in Costa Ricaduring 2004, 2009 and 2010. A total of 12 species of the louse genus Myrsidea were collected from 54 birds, including four previously named, seven new undescribed species, and one identified as Myrsidea sp. Names, descriptions and illustrations are given for the seven new species of Myrsidea. They and their type hosts are: Myrsidea assimilis sp. nov. ex Turdus assimilis (Cabanis, 1850), M. cerrodelamuertensis sp. nov. ex Catharus gracilirostris (Salvin, 1865), M. hrabaki sp. nov. ex Myadestes melanops (Salvin, 1865), M. obsoleti sp. nov. ex Turdus obsoletus (Lawrence, 1862), M. quinchoi sp. nov. ex Catharus frantzii (Cabanis, 1861), M. tapanti sp. nov. ex Catharus fuscater (Lafresnaye, 1845), and M. tapetapersi sp. nov. ex Turdus nigrescens (Cabanis, 1861). Records of four named and one unidentified species of Myrsidea from other Costa Rican thrushes are also given and discussed.

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