Glebych minutissimus gen. et sp. nov., the smallest cobweb spider (Araneae: Theridiidae)

Glebych minutissimus gen. et sp. n., (♂♀), a minute six-eyed and apparently lungless theridiid spider, inhabiting epiphytes in foggy-forest belt at Peruvian Andes is described, representing the smallest (total length varies from 0.79 to 0.92 mm, carapace length ca. 0.36 mm) member of the family. Glebych gen. n. is related to the Neotropic genus Styposis Simon, 1894, which is small-sized and six-eyed as well.

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An investigation of the karyotypes of four species from the genera Setcreasea, Spironema and Tradescantia (Commelinaceae)

Acta Societatis Botanicorum Poloniae ◽

10.5586/asbp.1989.040 ◽

2014 ◽

Vol 58 (4) ◽

pp. 527-540

Author(s):

Elżbieta Weryszko-Chmielewska

Keyword(s):

Tetraploid Species ◽

Setcreasea Purpurea ◽

Total Length ◽

The Family

An investigation was conducted on the number and morphology of the chromosomes of four species from the family Commelinacene: Spironema fragrans Lindl., Setereasea purpurea Boom, Tradescantia albiflora Kunth. and Tradescantia blossfeldiana Mildbr. It was found that the karyotype of Spironema fragrans Lindl. was 2n = 12 chromosomes whose total length was 6.9-13.7 µm and the formula of the karyotype was: 2m+2sm +2m+2t+2stsat +2st Setcreasea purpurea Boom. had 2n = 24 chromosomes, 9.1-12.1 µm in length and the centromere positioned as represented by the formula 24m. The karyotype of Tradsescantia albiflora Kunth. had 2n = 60 chromosomes whose lengths ranged from 1.4 to 4.5 µm, and is described by the formula: 4sm+6m+10st+10sm+10m+20sm. The complex of chromosomes from Tradescantia blossfeldiana Mildbr. consisted of 2n = 60. Their length was 1.3-4.8 µm. The morphological types of the chromosomes are represented by the formula 6st+2m+2sm+6st+2sm+12m+10M+l4m+6sm. It is suggested on the basis of morphological analysis of chromosomes that Setereasea purpurea Boom is a tetraploid species and Trudescantia albiflora Kunth. and T. blossfeldiana Mildbr. are decaploids.

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Sexual dimorphism and intersexuality in Upogebia stellata (Crustacea: Decapoda: Thalassinidea)

Journal of the Marine Biological Association of the United Kingdom ◽

10.1017/s0025315401005070 ◽

2001 ◽

Vol 81 (6) ◽

pp. 1061-1062 ◽

Cited By ~ 15

Author(s):

Eunice H. Pinn ◽

R. James A. Atkinson ◽

Andrew Rogerson

Keyword(s):

Sexual Dimorphism ◽

Carapace Length ◽

Single Specimen ◽

Male And Female ◽

Total Length ◽

Mud Shrimp ◽

External Characteristics

Evidence of sexual dimorphism in the mud-shrimp Upogebia stellata was observed in the abdomen length, total length, and also in the chelae. For the same carapace length, males had a shorter abdomen and, therefore, total length, whilst their chelae were larger and more robust than the females. Of the 91 U. stellata individuals examined, a single specimen was found to be of an intersex type, i.e. it exhibited both male and female external characteristics. Sexual dimorphism and intersexuality are discussed.

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Length-Length and Length-Weight Relationships in Nephrops norvegicus from the Aegean Sea (Linnaeus, 1758)

Mediterranean Marine Science ◽

10.12681/mms.56 ◽

2011 ◽

Vol 12 (1) ◽

pp. 121

Author(s):

I. AYDIN ◽

C. AYDIN

Keyword(s):

Carapace Length ◽

Aegean Sea ◽

Body Width ◽

Nephrops Norvegicus ◽

Frequency Distributions ◽

Total Length ◽

Size Frequency ◽

Length Width

The objective of this study was to determine the length-length, length-width and length-weight relationships inNephrops norvegicus as a basis for conversions. A total of 659 specimens were collected with trawl gears from the commercial trawler “Hapuloğlu” between 17 and 21 August 2008 in international waters of the middle Aegean Sea. Morphometric equations for the conversions of length and weight were constructed for females, males, and combined sexes. Females were generally smaller than males, and size-frequency distributions total length (TL), carapace length (CL), and body width (BW) revealed significant differences between females and males

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Statolith diameter as an alternative measure of size in the mysid, Neomysis nigra Nakazawa, 1910 (Mysida)

Crustaceana ◽

10.1163/15685403-00003521 ◽

2016 ◽

Vol 89 (3) ◽

pp. 337-341

Author(s):

Jae-Yong Bae ◽

Jung-Hwa Choi ◽

Won-Gyu Park

Keyword(s):

Body Size ◽

Carapace Length ◽

Alternative Measure ◽

Total Length ◽

Alternative Measurement ◽

The Relationship

Total length, and the length of carapace and telson, are generally used to measure the size of mysid crustaceans. However, this method may not be as accurate for measuring these animals, since mysids commonly bend their abdomen when they are collected and preserved. Besides, the fragile carapace of mysids may result in less accurate outputs in such size measurements. The aim of this study was to determine the relationship between carapace length and statolith diameter in Mysida. The carapace length and statolith diameter were measured in 1199 individuals of Neomysis nigra Nakazawa, 1910. The statolith diameter was significantly correlated with carapace length. It is suggested that the statolith diameter of mysids could be used as an alternative measurement for characterizing body size in these crustaceans.

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Analisis Pola Pertumbuhan dan Morfometrik Udang Jerbung (Penaeus merguiensis De Man, 1888) di Perairan Sekitar Bakoi, Sorong Selatan

Musamus Fisheries and Marine Journal ◽

10.35724/mfmj.v3i2.3401 ◽

2021 ◽

pp. 144-153

Author(s):

Ridwan Sala ◽

Roni Bawole ◽

Aldrin Bonggoibo ◽

Thomas Frans Pattiasina ◽

Sampari Suruan ◽

...

Keyword(s):

Carapace Length ◽

Allometric Growth ◽

Total Length ◽

West Papua ◽

Data Collections ◽

De Man ◽

The Relationship ◽

Best Estimator ◽

Fishing Area ◽

Penaeus Merguiensis

The waters of South Sorong have potential shrimp resources, including abundant banana shrimp (Penaeus merguiensis de Man, 1888). This study aims to obtain information about the morphometric characteristics and growth of banana shrimp in the fishing area around the waters of Kampung Bakoi, South Sorong Regency, West Papua Province. Data collections were carried out in June and October 2019 using descriptive methods with direct observation techniques. Based on the results of data analysis, it was found that the total length of shrimp caught in Bakoi Village was in the range of 10 - 26.8 cm and the most were caught measuring 15.2 cm to 16.4 cm. The model of the relationship between length and weight of banana shrimp in Bakoi Village follows the equation Log W= 1,630+2,659 Log (L) or the form of negative allometric growth. Analysis of the relationship between total length (Y) and carapace length (X) (including rostrum) and the relationship between total length and carapace length (Z) (excluding rostrum) obtained the best estimator models, each following the logarithmic equations L = -2,188 + 10,226 Ln(PK) and L = 4,439 + 9,201 Ln(PKt) respectively.

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Growth, Reproduction, and Distribution of Pandalid Shrimps in British Columbia

Journal of the Fisheries Research Board of Canada ◽

10.1139/f64-121 ◽

1964 ◽

Vol 21 (6) ◽

pp. 1403-1452 ◽

Cited By ~ 51

Author(s):

T. H. Butler

Keyword(s):

British Columbia ◽

Body Weight ◽

Sex Change ◽

Strait Of Georgia ◽

Phase Averaging ◽

Commercial Importance ◽

Total Length ◽

The Family ◽

Early Maturing ◽

Female Phase

The ranges, habitats, and commercial importance are described for nine species of the family Pandalidae: Pandalopsis dispar, Pandalus jordani, P. borealis, P. platyceros, P. hypsinotus, P. danae, P. montagui tridens, P. stenolepis, P. goniurus. A key for their identification is given. Over 27,400 specimens were sampled, using trawl and trap gear, mostly from the Strait of Georgia. Pandalopsis dispar is a male at [Formula: see text] years, attaining a total length of 136 mm and body weight of 6.5 g; at 30 months, in the female phase, the length is 169 mm and weight 16.3 g. Pandalus jordani matures as a male, and to a lesser extent a female, at about 18 months, reaching a length of 105 mm and weight of 3.8 g; at [Formula: see text] years all are in the female phase, averaging 118 mm in total length and 5.8 g in body weight. P. platyceros is first a male at [Formula: see text] years, attaining a length of 140 mm and weight of 14.2 g; most remain as males for another year, and at [Formula: see text] years the total length is 180 mm and weight 35.5 g. Pandalus hypsinotus matures as a male, and to some extent as a female, at about [Formula: see text] years, at a total length of 124 mm and weight of 10.3 g; at 30 months the length is 130 mm and weight 12.7 g. Almost as many females as males of P. borealis mature at [Formula: see text] years, attaining a length of 95 mm and weight of 3.2 g; at 30 months, in the female phase, the length is 119 mm and weight 6.1 g. Pandalus danae matures first as a male, and to some extent as a female, at [Formula: see text] years, reaching 88 mm in length and 4.4 g; in the female phase, at [Formula: see text] years the length is 105 mm and weight 8.5 g. Growth of P. montagui tridens, P. stenolepis, and P. goniurus is uncertain, but all undergo sex change. Growth as related to habitat and early maturing of females as related to geographic and bathymetric ranges are discussed.

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An abnormal rostrum in a wild subadult shrimp Farfantepenaeus duorarum (Burkenroad, 1939) (Decapoda, Penaeidae) from the southern Gulf of Mexico

Crustaceana ◽

10.1163/15685403-bja10043 ◽

2020 ◽

Vol 93 (9-10) ◽

pp. 989-997

Author(s):

Armando T. Wakida-Kusunoki ◽

Jose L. Cruz-Sánchez ◽

Marco A. May-Kú ◽

Pedro-Luis Ardisson

Keyword(s):

Gulf Of Mexico ◽

Carapace Length ◽

Pink Shrimp ◽

Morphological Abnormalities ◽

The Family ◽

Southern Gulf Of Mexico ◽

Farfantepenaeus Duorarum ◽

First Time ◽

Subadult Female

Abstract An abnormal bifid rostrum is reported for the first time for a wild-caught subadult female (carapace length = 22.5 mm) of the pink shrimp Farfantepenaeus duorarum (Burkenroad, 1939) from Celestun lagoon, Yucatan, southern Gulf of Mexico. A review of registers on morphological abnormalities in shrimps of the family Penaeidae is provided.

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A New Species of Andean Gymnophthalmid Lizard (Squamata: Gymnophthalmidae) from the Peruvian Andes, and Resolution of Some Taxonomic Problems

Diversity ◽

10.3390/d12090361 ◽

2020 ◽

Vol 12 (9) ◽

pp. 361

Author(s):

Luis Mamani ◽

Juan C. Chaparro ◽

Claudio Correa ◽

Consuelo Alarcón ◽

Cinthya Y. Salas ◽

...

Keyword(s):

New Species ◽

Dna Sequences ◽

Phylogenetic Relationships ◽

Taxonomic Status ◽

Neotropical Region ◽

Likelihood Method ◽

Peruvian Andes ◽

Phylogenetic Studies ◽

The Family ◽

A New Species

The family Gymnophthalmidae is one of the most speciose lineages of lizards in the Neotropical region. Despite recent phylogenetic studies, the species diversity of this family is unknown and thus, its phylogenetic relationships remain unclear and its taxonomy unstable. We analyzed four mitochondrial (12S, 16S, Cytb, ND4) and one nuclear (c-mos) DNA sequences of Pholidobolus anomalus, Cercosaura manicata boliviana and Cercosaura sp., using the maximum likelihood method to give insights into the phylogenetic relationships of these taxa within Cercosaurinae. Our results suggest that Pholidolus anomalus is nested within the clade of Cercosaura spp., that material we collected near Oxapampa belongs to a new species of Cercosaura, and that lizards identified as Cercosaura manicata boliviana belong to a separate lineage, possibly a new genus. We assign Pholidobolus anomalus to Cercosaura, redescribe the species, and designate a neotype to replace the lost holotype. In addition, we describe the new species of Cercosaura, and comment about the taxonomic status of “Cercosaura manicata boliviana”incertae sedis.

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Allometry of sexual size dimorphism in turtles: a comparison of mass and length data

PeerJ ◽

10.7717/peerj.2914 ◽

2017 ◽

Vol 5 ◽

pp. e2914 ◽

Cited By ~ 3

Author(s):

Koy W. Regis ◽

Jesse M. Meik

Keyword(s):

Body Mass ◽

Carapace Length ◽

Sexual Size Dimorphism ◽

Rensch’S Rule ◽

Size Dimorphism ◽

Straight Carapace Length ◽

Rensch's Rule ◽

The Family ◽

Family Level ◽

Males And Females

BackgroundThe macroevolutionary pattern of Rensch’s Rule (positive allometry of sexual size dimorphism) has had mixed support in turtles. Using the largest carapace length dataset and only large-scale body mass dataset assembled for this group, we determine (a) whether turtles conform to Rensch’s Rule at the order, suborder, and family levels, and (b) whether inferences regarding allometry of sexual size dimorphism differ based on choice of body size metric used for analyses.MethodsWe compiled databases of mean body mass and carapace length for males and females for as many populations and species of turtles as possible. We then determined scaling relationships between males and females for average body mass and straight carapace length using traditional and phylogenetic comparative methods. We also used regression analyses to evalutate sex-specific differences in the variance explained by carapace length on body mass.ResultsUsing traditional (non-phylogenetic) analyses, body mass supports Rensch’s Rule, whereas straight carapace length supports isometry. Using phylogenetic independent contrasts, both body mass and straight carapace length support Rensch’s Rule with strong congruence between metrics. At the family level, support for Rensch’s Rule is more frequent when mass is used and in phylogenetic comparative analyses. Turtles do not differ in slopes of sex-specific mass-to-length regressions and more variance in body size within each sex is explained by mass than by carapace length.DiscussionTurtles display Rensch’s Rule overall and within families of Cryptodires, but not within Pleurodire families. Mass and length are strongly congruent with respect to Rensch’s Rule across turtles, and discrepancies are observed mostly at the family level (the level where Rensch’s Rule is most often evaluated). At macroevolutionary scales, the purported advantages of length measurements over weight are not supported in turtles.

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DISTRIBUSI FREKUENSI PANJANG, HUBUNGAN PANJANG TUBUH, PANJANG KLASPER, DAN NISBAH KELAMIN CUCUT LANJAMAN (Carcharhinus falciformis)

Jurnal Penelitian Perikanan Indonesia ◽

10.15578/jppi.13.3.2007.243-254 ◽

2017 ◽

Vol 13 (3) ◽

pp. 243 ◽

Cited By ~ 1

Author(s):

Dharmadi Dharmadi ◽

Fahmi Fahmi ◽

Mohammad Adrim

Keyword(s):

Sex Ratio ◽

Fishing Gear ◽

Length Frequency ◽

Total Length ◽

Gill Net ◽

Long Line ◽

The Family ◽

Landing Sites ◽

Silky Shark ◽

The Indian Ocean

Cucut lanjaman (C. falciformis) merupakan salah satu jenis cucut dari famili Carcharhinidae yang umum tertangkap di perairan Samudera Hindia dengan alat tangkap rawai cucut, rawai tuna, dan jaring insang tuna. Penelitian ini dilakukan pada bulan April 2001 sampai dengan Desember 2004 di beberapa tempat pendaratan ikan dan pasar ikan di Pelabuhanratu, Cilacap, Kedonganan-Bali, dan Tanjung Luar-Lombok. Hasil penelitian menunjukkan bahwa hubungan antara panjang total dengan panjang klasper terlihat eksponensial, dengan nilai R2=0,8218 (untuk klasper yang belum berisi zat kapur), dan nilai R2=0,8197 (untuk klasper yang sebagian berisi zat kapur), dan linier dengan nilai R2=0,7529 (untuk klasper yang penuh dengan zat kapur). Korelasi antara panjang klasper dengan panjang total tubuh cucut semakin kecil dengan semakin bertambah zat kapur dalam klasper. Frekuensi panjang terendah pada cucut lanjaman betina antara 51 sampai dengan 60 cm dan 241 sampai dengan 250 cm dan frekuensi panjang tertinggi antara 181 sampai dengan 190 cm. Pada cucut lanjaman jantan, frekuensi panjang terendah 251 sampai dengan 260 cm dan tertinggi antara 181 sampai dengan 190 cm. Sedangkan nisbah kelamin jantan dan betina cucut lanjaman mendekati 1:1 (51:49%). Nilai perbandingan nisbah kelamin suatu spesies dapat disebabkan oleh ketersediaan ikan dan selektivitas alat tangkap. Silky shark (C. falciformis) is one of the family Carcharhinidae community caught by shark longlin from, drift tuna long line and drift gill net in the Indian Ocean. This study was conducted between April 2001 to December 2004 at some fish landing sites an or fish market i.e. Palabuhanratu, Cilacap, Kedonganan-Bali, and Tanjung Luar Lombok. Results showed relationship between total length and clasper length was exponential (R2=0.8218), for not calcification clasper, and (R2=0.8197) for not full calcification clasper, and linier (R2=0.7529) for full calcification claspe . The correlation of clasper length and total length of silky shark tend to be smaller with in creasing calcificated content and clasper. The lowest length frequency of female silky shark was 51 to 60 cm and 241 to 250 cm, and the highest length frequency was 181 to 190 cm. Lowest length frequency of male silky shark was 251 to 260 cm and the highest was 181 to 190 cm. While sex ratio of male and female was mostly 1:1 (51: 49%). Variation of sex ratio occured due to the availability of fish and the selectivity of the fishing gear.

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