412 research outputs found
Tylorida sataraensis Kulkarni 2014
No full textTylorida sataraensis Kulkarni, 2014 Materials Type status: Other material. Occurrence: catalogNumber: BNHS Sp. 119; recordedBy: V. Deshpande; individualCount: 1; sex: 1 male; lifeStage: Adults; Taxon: scientificName: Tylorida sataraensis; kingdom: Animalia; phylum: Arthropoda; class: Arachnida; order: Araneae; family: Tetragnathidae; genus: Tylorida; specificEpithet: sataraensis; taxonRank: species; scientificNameAuthorship: Kulkarni, 2014; taxonomicStatus: accepted; Location: continent: Asia; country: India; countryCode: IN; stateProvince: Maharashtra; municipality: Satara; locality: Chalkewadi; verbatimLocality: Chalkewadi sada; verbatimElevation: 1078 m; georeferenceVerificationStatus: Verified by collector; Identification: identifiedBy: Siddharth Kulkarni; dateIdentified: 08/05/2014; Event: samplingProtocol: Hand picking; eventDate: 05/06/2013; habitat: Rocky plateaus; Record Level: language: en; rightsHolder: Siddharth Kulkarni; institutionID: Bombay Natural History Society (BNHS), Mumbai; institutionCode: BNHS; collectionCode: Sp Type status: Other material. Occurrence: catalogNumber: BNHS Sp. 120-121; recordedBy: S. Kulkarni and A. Vartak; individualCount: 2; sex: 2 males; lifeStage: Adults; Taxon: scientificName: Tylorida sataraensis; kingdom: Animalia; phylum: Arthropoda; class: Arachnida; order: Araneae; family: Tetragnathidae; genus: Tylorida; specificEpithet: sataraensis; taxonRank: species; scientificNameAuthorship: Kulkarni, 2014; taxonomicStatus: accepted; Location: continent: Asia; country: India; countryCode: IN; stateProvince: Maharashtra; municipality: Satara; locality: Chalkewadi; verbatimLocality: Chalkewadi sada; verbatimElevation: 1078 m; georeferenceVerificationStatus: Verified by collector; Identification: identifiedBy: Siddharth Kulkarni; dateIdentified: 08/05/2014; Event: samplingProtocol: Hand picking; eventDate: 04/19/2014; habitat: Rocky plateaus; Record Level: language: en; rightsHolder: Siddharth Kulkarni; institutionID: Bombay Natural History Society (BNHS), Mumbai; institutionCode: BNHS; collectionCode: Sp Type status: Other material. Occurrence: catalogNumber: BNHS Sp. 122 & 123; recordedBy: S. Kulkarni; individualCount: 2; sex: 2 males; lifeStage: Adults; Taxon: scientificName: Tylorida sataraensis; kingdom: Animalia; phylum: Arthropoda; class: Arachnida; order: Araneae; family: Tetragnathidae; genus: Tylorida; specificEpithet: sataraensis; taxonRank: species; scientificNameAuthorship: Kulkarni, 2014; taxonomicStatus: accepted; Location: continent: Asia; country: India; countryCode: IN; stateProvince: Maharashtra; municipality: Satara; locality: Kaas; verbatimLocality: Kaas sada; verbatimElevation: 1123 m; georeferenceVerificationStatus: Verified by collector; Identification: identifiedBy: Siddharth Kulkarni; dateIdentified: 08/05/2014; Event: samplingProtocol: Hand picking; eventDate: 02/14/2014; habitat: Rocky plateaus; Record Level: language: en; rightsHolder: Siddharth Kulkarni; institutionID: Bombay Natural History Society (BNHS), Mumbai; institutionCode: BNHS; collectionCode: Sp Description Total length: 8.1-9.7; carapace: 3.91-4.27 long, 2.31-2.48 wide; abdomen: 3.89-4.01 long, 1.78-1.89 wide. Body pattern in male similar to its female (Kulkarni 2014) (Figs 6, 7). Cephalothorax. Cephalic and thoracic region in same plane. Lateral eyes encircled black, placed on prominent tubercles. AME separated by its diameter, PME less than its diameter. Smooth black pubescence on carapace. Thoracic region margined dark black. Chelicerae brown, long with three promarginal and four retromarginal teeth. Labium brown, semi-circular with slight corrugations; endites longer than wide, with wider proximal edge. Sternum brown, overall heart-shaped with straight margin at coxa II and folded inwards at coxae III and IV. Legs yellow coloured, femora black distally. Abdomen oval shaped, narrower than cephalothorax and slightly overlapping thoracic region when viewed laterally. Dorsum covered with greenish pubescence; venter black with thick yellow lines on the margin, sparsely covered with silver specks and whitish pubescence. Cymbial dorso-basal process is shorter than half the cymbial width and perpendicular to cymbium longitudinal axis. Embolar base roughly circular. Long macrosetae on palpal metatarsus measuring half times its length. Morphometry of palpal organs is given in Table 1. Remarks The variation in body size and patterns in T. ventralis (see Jäger and Praxaysombath 2009) may be confused with T. sataraensis. Male palp and female epigyne examination can confirm the species identity. Furthermore, we found webs of T. sataraensis exclusively above and across stream water surfaces whereas webs of T. ventralis were found either adjacent to stream margins or away, among low vegetation; both observed in different localities. Diagnosis Tylorida sataraensis is closely related to T. ventralis but distinguished from all described Tylorida species by the following combination of characters: less swollen tegulum ventrally, longer embolar tip (Figs 1, 2, 3), presence of macroseta on palpal patella (Fig. 4). CDBP erect and pointed in T. sataraensis but slightly bent upwards near tip in T. ventralis (Fig. 5). Paracymbium arrow shaped, lateral margins curved, distal end folded inwards in former but with straight lateral margins and distal edge bulged at one end in latter species. Overall, T. sataraensis is large sized species than T. ventralis (Table 1). Distribution India, Maharashtra, Satara.Published as part of Kulkarni, Siddharth Shrikant & Lewis, Todd R, 2015, Description of male Tyloridasataraensis Kulkarni, 2014 (Araneae, Tetragnathidae) with notes on habits and conservation status, pp. 4451 in Biodiversity Data Journal 3 on page 4451, DOI: 10.3897/BDJ.3.e445
Tylorida sataraensis Kulkarni 2014
No full text<p>Tylorida sataraensis Kulkarni, 2014</p> <p>Materials</p> <p>Type status: Other material. Occurrence: catalogNumber: BNHS Sp. 119; recordedBy: V. Deshpande; individualCount: 1; sex: 1 male; lifeStage: Adults; Taxon: scientificName: Tylorida sataraensis; kingdom: Animalia; phylum: Arthropoda; class: Arachnida; order: Araneae; family: Tetragnathidae; genus: Tylorida; specificEpithet: sataraensis; taxonRank: species; scientificNameAuthorship: Kulkarni, 2014; taxonomicStatus: accepted; Location: continent: Asia; country: India; countryCode: IN; stateProvince: Maharashtra; municipality: Satara; locality: Chalkewadi; verbatimLocality: Chalkewadi sada; verbatimElevation: 1078 m; georeferenceVerificationStatus: Verified by collector; Identification: identifiedBy: Siddharth Kulkarni; dateIdentified: 08/05/2014; Event: samplingProtocol: Hand picking; eventDate: 05/06/2013; habitat: Rocky plateaus; Record Level: language: en; rightsHolder: Siddharth Kulkarni; institutionID: Bombay Natural History Society (BNHS), Mumbai; institutionCode: BNHS; collectionCode: Sp Type status: Other material. Occurrence: catalogNumber: BNHS Sp. 120-121; recordedBy: S. Kulkarni and A. Vartak; individualCount: 2; sex: 2 males; lifeStage: Adults; Taxon: scientificName: Tylorida sataraensis; kingdom: Animalia; phylum: Arthropoda; class: Arachnida; order: Araneae; family: Tetragnathidae; genus: Tylorida; specificEpithet: sataraensis; taxonRank: species; scientificNameAuthorship: Kulkarni, 2014; taxonomicStatus: accepted; Location: continent: Asia; country: India; countryCode: IN; stateProvince: Maharashtra; municipality: Satara; locality: Chalkewadi; verbatimLocality: Chalkewadi sada; verbatimElevation: 1078 m; georeferenceVerificationStatus: Verified by collector; Identification: identifiedBy: Siddharth Kulkarni; dateIdentified: 08/05/2014; Event: samplingProtocol: Hand picking; eventDate: 04/19/2014; habitat: Rocky plateaus; Record Level: language: en; rightsHolder: Siddharth Kulkarni; institutionID: Bombay Natural History Society (BNHS), Mumbai; institutionCode: BNHS; collectionCode: Sp Type status: Other material. Occurrence: catalogNumber: BNHS Sp. 122 & 123; recordedBy: S. Kulkarni; individualCount: 2; sex: 2 males; lifeStage: Adults; Taxon: scientificName: Tylorida sataraensis; kingdom: Animalia; phylum: Arthropoda; class: Arachnida; order: Araneae; family: Tetragnathidae; genus: Tylorida; specificEpithet: sataraensis; taxonRank: species; scientificNameAuthorship: Kulkarni, 2014; taxonomicStatus: accepted; Location: continent: Asia; country: India; countryCode: IN; stateProvince: Maharashtra; municipality: Satara; locality: Kaas; verbatimLocality: Kaas sada; verbatimElevation: 1123 m; georeferenceVerificationStatus: Verified by collector; Identification: identifiedBy: Siddharth Kulkarni; dateIdentified: 08/05/2014; Event: samplingProtocol: Hand picking; eventDate: 02/14/2014; habitat: Rocky plateaus; Record Level: language: en; rightsHolder: Siddharth Kulkarni; institutionID: Bombay Natural History Society (BNHS), Mumbai; institutionCode: BNHS; collectionCode: Sp</p> <p>Description</p> <p>Total length: 8.1-9.7; carapace: 3.91-4.27 long, 2.31-2.48 wide; abdomen: 3.89-4.01 long, 1.78-1.89 wide. Body pattern in male similar to its female (Kulkarni 2014) (Figs 6, 7). Cephalothorax. Cephalic and thoracic region in same plane. Lateral eyes encircled black, placed on prominent tubercles. AME separated by its diameter, PME less than its diameter. Smooth black pubescence on carapace. Thoracic region margined dark black. Chelicerae brown, long with three promarginal and four retromarginal teeth. Labium brown, semi-circular with slight corrugations; endites longer than wide, with wider proximal edge. Sternum brown, overall heart-shaped with straight margin at coxa II and folded inwards at coxae III and IV. Legs yellow coloured, femora black distally. Abdomen oval shaped, narrower than cephalothorax and slightly overlapping thoracic region when viewed laterally. Dorsum covered with greenish pubescence; venter black with thick yellow lines on the margin, sparsely covered with silver specks and whitish pubescence.</p> <p>Cymbial dorso-basal process is shorter than half the cymbial width and perpendicular to cymbium longitudinal axis. Embolar base roughly circular. Long macrosetae on palpal metatarsus measuring half times its length. Morphometry of palpal organs is given in Table 1.</p> <p>Remarks</p> <p>The variation in body size and patterns in T. ventralis (see Jäger and Praxaysombath 2009) may be confused with T. sataraensis. Male palp and female epigyne examination can confirm the species identity. Furthermore, we found webs of T. sataraensis exclusively above and across stream water surfaces whereas webs of T. ventralis were found either adjacent to stream margins or away, among low vegetation; both observed in different localities.</p> <p>Diagnosis</p> <p>Tylorida sataraensis is closely related to T. ventralis but distinguished from all described Tylorida species by the following combination of characters: less swollen tegulum ventrally, longer embolar tip (Figs 1, 2, 3), presence of macroseta on palpal patella (Fig. 4). CDBP erect and pointed in T. sataraensis but slightly bent upwards near tip in T. ventralis (Fig. 5). Paracymbium arrow shaped, lateral margins curved, distal end folded inwards in former but with straight lateral margins and distal edge bulged at one end in latter species. Overall, T. sataraensis is large sized species than T. ventralis (Table 1).</p> <p>Distribution</p> <p>India, Maharashtra, Satara.</p>Published as part of <i>Kulkarni, Siddharth Shrikant & Lewis, Todd R, 2015, Description of male Tyloridasataraensis Kulkarni, 2014 (Araneae, Tetragnathidae) with notes on habits and conservation status, pp. 4451 in Biodiversity Data Journal 3</i> on page 4451, DOI: 10.3897/BDJ.3.e445
Giant assassin in the cave: a new species of the genus Myiophanes from Sri Lanka (Hemiptera: Heteroptera: Reduviidae: Emesinae)
No full textGhate, Hemant V., Kulkarni, Siddharth, Benjamin, Suresh P. (2018): Giant assassin in the cave: a new species of the genus Myiophanes from Sri Lanka (Hemiptera: Heteroptera: Reduviidae: Emesinae). Zootaxa 4524 (2): 237-244, DOI: 10.11646/zootaxa.4524.2.
FIGURES 5–7 in A new cavernicolous assassin bug of the genus Bagauda Bergroth (Heteroptera: Reduviidae: Emesinae) from the Western Ghats, India
No full textFIGURES 5–7. Bagauda ernstmayri sp. nov., fore leg. 5, Femur, tibia and tarsus showing color and relative proportions; 6, tarsus showing dark, longest basal segment; 7, tibia showing a ventral row of adpressed dark spines.Published as part of Kulkarni, Siddharth & Ghate, Hemant V., 2016, A new cavernicolous assassin bug of the genus Bagauda Bergroth (Heteroptera: Reduviidae: Emesinae) from the Western Ghats, India, pp. 365-375 in Zootaxa 4127 (2) on page 369, DOI: 10.11646/zootaxa.4127.2.8, http://zenodo.org/record/26680
Approximation Algorithms for Envy-Free Cake Division with Connected Pieces
No full textCake cutting is a classic model for studying fair division of a heterogeneous, divisible resource among agents with individual preferences. Addressing cake division under a typical requirement that each agent must receive a connected piece of the cake, we develop approximation algorithms for finding envy-free (fair) cake divisions. In particular, this work improves the state-of-the-art additive approximation bound for this fundamental problem. Our results hold for general cake division instances in which the agents' valuations satisfy basic assumptions and are normalized (to have value 1 for the cake). Furthermore, the developed algorithms execute in polynomial time under the standard Robertson-Webb query model.
Prior work has shown that one can efficiently compute a cake division (with connected pieces) in which the additive envy of any agent is at most 1/3. An efficient algorithm is also known for finding connected cake divisions that are (almost) 1/2-multiplicatively envy-free. Improving the additive approximation guarantee and maintaining the multiplicative one, we develop a polynomial-time algorithm that computes a connected cake division that is both (1/4 +o(1))-additively envy-free and (1/2 - o(1))-multiplicatively envy-free. Our algorithm is based on the ideas of interval growing and envy-cycle elimination.
In addition, we study cake division instances in which the number of distinct valuations across the agents is parametrically bounded. We show that such cake division instances admit a fully polynomial-time approximation scheme for connected envy-free cake division
The spiny theridiid genus Meotipa Simon, 1895 in India, with description of a strange new species with translucent abdomen and a phylogenetic analysis about the genus placement (Araneae, Theridiidae)
No full textKulkarni, Siddharth, Vartak, Atul, Deshpande, Vishwas, Halali, Dheeraj (2017): The spiny theridiid genus Meotipa Simon, 1895 in India, with description of a strange new species with translucent abdomen and a phylogenetic analysis about the genus placement (Araneae, Theridiidae). Zootaxa 4291 (3): 504-520, DOI: https://doi.org/10.11646/zootaxa.4291.3.
Molecular phylogeny of pimoid spiders and the limits of Linyphiidae, with a reassessment of male palpal homologies (Araneae, Pimoidae)
No full textHormiga, Gustavo, Kulkarni, Siddharth, Moreira, Thiago Da Silva, Dimitrov, Dimitar (2021): Molecular phylogeny of pimoid spiders and the limits of Linyphiidae, with a reassessment of male palpal homologies (Araneae, Pimoidae). Zootaxa 5026 (1): 71-101, DOI: 10.11646/zootaxa.5026.1.
Description of male Tylorida sataraensis Kulkarni, 2014 (Araneae, Tetragnathidae) with notes on habits and conservation status
No full textThe male sex of Tylorida sataraensis Kulkarni, 2014 is described based on specimens from the type locality. The distinguishing characters from its closest species Tylorida ventralis (Thorell, 1877) are detailed. An interesting behaviour of going underwater by T. sataraensis, on disturbance is recorded and tested for significance. The surveys have shown sighting of this species only to the perennial streams of the rocky outcrops in Satara region. The potential threats to this species and the possible conservation status based on known distribution are discussed
Myiophanes Reuter 1881
No full textMyiophanes Reuter, 1881 Myiophanes Reuter, 1881: 337. Type species by monotypy: Myiophanes tipulina Reuter, 1881. Myiophanes: Distant (1903: 204) (diagnosis), Wygodzinsky (1966: 270, 271, 274) (diagnosis, keys for the subgenera and included species, distribution), Maldonado Capriles (1990: 88–90) (catalogue), Rédei (2005: 24) (list and distribution of subgenus Myiophanes and description of two new Indomalayan species).Published as part of Ghate, Hemant V., Kulkarni, Siddharth & Benjamin, Suresh P., 2018, Giant assassin in the cave: a new species of the genus Myiophanes from Sri Lanka (Hemiptera: Heteroptera: Reduviidae: Emesinae), pp. 237-244 in Zootaxa 4524 (2) on page 238, DOI: 10.11646/zootaxa.4524.2.7, http://zenodo.org/record/261050
FIGURES 39–44. Meotipa picturata, female. 39 habitus dorsal vieW 40 habitus, lateral vieW 41 habitus, ventral vieW 42 epigynum, dorsal vieW 43 epigynum, ventral vieW 44 in The spiny theridiid genus Meotipa Simon, 1895 in India, with description of a strange new species with translucent abdomen and a phylogenetic analysis about the genus placement (Araneae, Theridiidae)
No full textFIGURES 39–44. Meotipa picturata, female. 39 habitus dorsal vieW 40 habitus, lateral vieW 41 habitus, ventral vieW 42 epigynum, dorsal vieW 43 epigynum, ventral vieW 44 copulatory openings at base of atrium. Scale lines: 1 mm (Figs. 39–41); 0.1 mm (Fig. 42).Published as part of Kulkarni, Siddharth, Vartak, Atul, Deshpande, Vishwas & Halali, Dheeraj, 2017, The spiny theridiid genus Meotipa Simon, 1895 in India, with description of a strange new species with translucent abdomen and a phylogenetic analysis about the genus placement (Araneae, Theridiidae), pp. 504-520 in Zootaxa 4291 (3) on page 516, DOI: 10.11646/zootaxa.4291.3.4, http://zenodo.org/record/82765
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