Seventeen new species of the spider genus<i>Teutamus</i>Thorell, 1890 from Southeast Asia (Araneae: Liocranidae)

Dankittipakul, Pakawin; Tavano, Maria; Singtripop, Tippawan

doi:10.1080/00222933.2012.681314

Cited by 5 publications

(12 citation statements)

References 10 publications

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“…We found P.J. Schwendinger to be the collector with most specimens contributed to the TG [19][20][21][22][23] ; between 1983 and 2009 he collected 231 TG specimens in Thailand. However, most of his specimens, presumably, due to logistics, were reported around June and July, and December.…”

Section: Discussionmentioning

confidence: 99%

“…Our one-month expedition captured 134 adult spiders of the TG (Table 1) representing all TG genera previously reported for Thailand and six out of seven liocranid genera reported for this country (only missing Paratus Simon, 1898). In total, 351 adults of the TG had been reported from Thailand [19][20][21][22][23]41 ; from these, ca. 200 had been reported in the same provinces we sampled (Chiang Mai, Krabi and Phuket) ( Table 1).…”

Section: Discussionmentioning

confidence: 99%

“…We accessed all taxonomic literature of the family Liocranidae available in the World Spider Catalog 27 . We selected 55 publications that contained taxonomic treatments of the family Liocranidae [19][20][21][22][23][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48] (for full list, see Supplementary Table 1). We selected and processed all publications that provided taxonomic treatments with specimen data and usable geographical references.…”

Section: Methodsmentioning

confidence: 99%

“…We targeted the ground spider Teutamus politus Thorell 1,890 and its relatives from the so called Teutamus group (TG) (Araneae, Liocranidae) 18 . This group of spiders is mostly distributed in Southeast Asia [19][20][21][22][23] and is composed of seven genera: Jacaena, Koppe, Oedignatha, Sesieutes, Sphingius, Sudharmia and Teutamus 18 . These spiders have been cataloged in the family Liocranidae; however, their phylogenetic relationships, biology and evolution are still poorly understood 18,24 .…”

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Mining data from legacy taxonomic literature and application for sampling spiders of the Teutamus group (Araneae; Liocranidae) in Southeast Asia

Rivera-Quiroz

Petcharad

Miller

2020

Sci Rep

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Taxonomic literature contains information about virtually ever known species on Earth. In many cases, all that is known about a taxon is contained in this kind of literature, particularly for the most diverse and understudied groups. Taxonomic publications in the aggregate have documented a vast amount of specimen data. Among other things, these data constitute evidence of the existence of a particular taxon within a spatial and temporal context. When knowledge about a particular taxonomic group is rudimentary, investigators motivated to contribute new knowledge can use legacy records to guide them in their search for new specimens in the field. However, these legacy data are in the form of unstructured text, making it difficult to extract and analyze without a human interpreter. Here, we used a combination of semi-automatic tools to extract and categorize specimen data from taxonomic literature of one family of ground spiders (Liocranidae). We tested the application of these data on fieldwork optimization, using the relative abundance of adult specimens reported in literature as a proxy to find the best times and places for collecting the species (Teutamus politus) and its relatives (Teutamus group, TG) within Southeast Asia. Based on these analyses we decided to collect in three provinces in Thailand during the months of June and August. With our approach, we were able to collect more specimens of T. politus (188 specimens, 95 adults) than all the previous records in literature combined (102 specimens). Our approach was also effective for sampling other representatives of the TG, yielding at least one representative of every TG genus previously reported for Thailand. In total, our samples contributed 231 specimens (134 adults) to the 351 specimens previously reported in the literature for this country. Our results exemplify one application of mined literature data that allows investigators to more efficiently allocate effort and resources for the study of neglected, endangered, or interesting taxa and geographic areas. Furthermore, the integrative workflow demonstrated here shares specimen data with global online resources like Plazi and GBIF, meaning that others can freely reuse these data and contribute to them in the future. The contributions of the present study represent an increase of more than 35% on the taxonomic coverage of the TG in GBIF based on the number of species. Also, our extracted data represents 72% of the occurrences now available through GBIF for the TG and more than 85% of occurrences of T. politus. Taxonomic literature is a key source of undigitized biodiversity data for taxonomic groups that are underrepresented in the current biodiversity data sphere. Mobilizing these data is key to understanding and protecting some of the less well-known domains of biodiversity.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

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Mining data from legacy taxonomic literature and application for sampling spiders of the Teutamus group (Araneae; Liocranidae) in Southeast Asia

Rivera-Quiroz

Petcharad

Miller

2020

Sci Rep

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“…A particularly interesting example is the Liocranidae where two different types of asymmetry are present [52][53][54]. For example, Jacaena mihun (Fig 3g) shows no external chirality, but internally the asymmetric copulation ducts are highly variable among individuals.…”

Section: Plos Onementioning

confidence: 99%

Imperfect and askew: A review of asymmetric genitalia in araneomorph spiders (Araneae: Araneomorphae)

2020

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Bilateral asymmetry in the genitalia is a rare but widely dispersed phenomenon in the animal tree of life. In arthropods, occurrences vary greatly from one group to another and there seems to be no common explanation for all the independent origins. In spiders, genital asymmetry appears to be especially rare. Most known species show almost perfectly symmetrical genitals with the right and left sides being mirror images of each other. However, some examples of asymmetric genitalia have been studied and many other reports are scattered in the taxonomic literature. Based on a broad literature survey, we found several species in thirteen families with evidence of genital asymmetry, mostly expressed only in females. Our review suggests that spider genital asymmetries, although rare, are more common than previously thought and taxonomic descriptions and illustrations are a useful but not entirely reliable tool for studying them. Here we also report on directional asymmetry in the liocranid spider Teutamus politus, the first known case of morphologically asymmetric male genitals in Entelegynae spiders. Generalities, evolution and categorization of asymmetry in spiders are further discussed.

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Selection for imperfection: A review of asymmetric genitalia in araneomorph spiders (Araneae: Araneomorphae)

Rivera-Quiroz

Petcharad

Miller

2019

Preprint

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26Bilateral asymmetry in the genitalia is a rare but widely dispersed phenomenon in the 27 animal tree of life. In arthropods, occurrences vary greatly from one group to another 28 and there seems to be no common explanation for all the independent origins. In 29 spiders, genital asymmetry appears to be especially rare. Few examples have been 30 studied in detail but isolated reports are scattered in the taxonomic literature. Based on a 31 broad literature study, we found several species in thirteen families with evidence of 32 genital asymmetry, mostly expressed only in females. Our review suggests that spider 33 genital asymmetries, although rare, are more common than previously thought and 34 taxonomic descriptions and illustrations are a useful but not entirely reliable tool for 35 studying them. Here we also document thoroughly the case of the liocranid spider 36 Teutamus politus. We collected live specimens to observe male-female interactions and 37 document their genital morphology. We consider T. politus to be the first known case of 38 directional asymmetry and the first report of developmentally asymmetric male genitals 39 in Entelegynae spiders. Generalities, evolution and categorization of asymmetry in 40 spiders are further discussed. 41 42 Liocranidae.45 46 47 48 50 Genital asymmetry is a trait that has evolved independently several times in many 51 animal groups. Invertebrates show a wide range of genital asymmetries with probably 52 thousands of independent origins. Many, sometimes not mutually exclusive, 53 explanations have been proposed, namely: i) morphological compensation for selected 54 changes in mating position; ii) sexually antagonistic co-evolution; iii) cryptic female 55 choice for asymmetric male genitalia; iv) different functions for the left and right side; 56 v) one-sided reduction to save space and resources; vi) functional constraints: to 57 function properly, the separate parts of the genitalia need to connect in an asymmetric 58 fashion; vii) efficient packing of internal organs in the body cavity [1-4]. 59 60 Asymmetries are often classified as fluctuating (FA), antisymmetry (AS) or directional 61 (DA) [3,5,6]. This categorization is based on the degree and relative frequencies of the 62 different chiral forms found in a population. FA describes slight asymmetric variation 63 around a symmetrical mean; the appearance of this type of asymmetry is usually related 64 to environmental or developmental constraints [5,7]. AS describes cases where two 65 mirror image forms, dextral and sinistral, are identifiable and within a population, 66 occurring usually in equal or similar proportions [3]. Finally, DA refers to cases where 67 only one asymmetric form is virtually always present [3]; this might be associated with 68 mechanical, behavioral, or functional differentiation and selection of one asymmetrical 69 form of the structures or organs [3,8].70 71Genital asymmetry, although rare as a whole, is a recurring phenomenon in a few 72 groups of arthropods like mites, crustaceans, o...

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Seventeen new species of the spider genusTeutamusThorell, 1890 from Southeast Asia (Araneae: Liocranidae)

Cited by 5 publications

References 10 publications

Mining data from legacy taxonomic literature and application for sampling spiders of the Teutamus group (Araneae; Liocranidae) in Southeast Asia

Mining data from legacy taxonomic literature and application for sampling spiders of the Teutamus group (Araneae; Liocranidae) in Southeast Asia

Imperfect and askew: A review of asymmetric genitalia in araneomorph spiders (Araneae: Araneomorphae)

Selection for imperfection: A review of asymmetric genitalia in araneomorph spiders (Araneae: Araneomorphae)

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