What the sources say
Brazilian Yellow ScorpionTityus serrulatus
Every figure, record and mechanism on the Brazilian Yellow Scorpion profile was written from a source, and this is the working table behind it: 50 claims checked word for word against these sources. The left column is what the page says. The right column is the source's own words, copied, not paraphrased; a ... marks a cut and[brackets] an insertion. Open any source and check it yourself.
Profile updated
Source
01
Pimenta et al. 2019
Pimenta et al. (2019). Selected to survive and kill: Tityus serrulatus, the Brazilian yellow scorpion. PLOS ONE.
- The page saysThe species is mainly parthenogenetic, reproduction without a mate
- The source says
As this is a mainly parthenogenetic species [21], only females could be obtained.
- The page saysa female's unfertilized eggs develop directly into daughters
- The source says
Tityus serrulatus is viviparous and can reproduce by parthenogenesis, producing progeny from non-fecundated eggs
Note: "Daughters" rests on lourenco-2015's "the absence of males from all known populations": the progeny of these populations are female. No cached source says the young are genetic copies of the mother, so that wording was cut. - The page saysunlike other scorpion species, which breed mainly in the hot, rainy months, she can do it in any month
- The source says
differently from other scorpion species, which give birth more frequently during hot and rainy months in the summer [21], this species is capable of producing offspring throughout the year
- The page saysThere are now records of it in every other Brazilian region
- The source says
there are currently records of T . serrulatus in all other Brazilian regions
- The page saystransport by road or rail is one of the main ways it spreads
- The source says
transportation by anthropic agents via roads or rail is one of the main ways of dispersion
- The page saysEndurance may be what gets it through those journeys.
- The source says
its exceptional ability to survive food and water deprivation, reported in this study, may contribute to the endurance needed to survive extensive displacement even when resources are limited
Note: The source's "may contribute" kept as "may be". - The page saysLaboratory scorpions with water but no food lasted up to 400 days
- The source says
T . serrulatus is highly tolerant to food deprivation, with individuals enduring up to 400 days without food
- The page sayswith water but no food
- The source says
control and FD animals had uninterrupted access to water
Note: FD is the study's food-deprived group, the one that reached 400 days. Water-deprived groups died far sooner: "access to water played a pivotal role". - The page sayssome gave birth after 209 days of starvation
- The source says
food-deprived animals were able to give birth after 209 days of starvation
- The page saysIt eats cockroaches, crickets, and spiders
- The source says
elimination of invertebrates on which they feed (cockroaches, crickets, spiders, etc.)
Note: Stated of the scorpions this T. serrulatus paper is about; butantan-booklet's natural-history section gives the same list (baratas, grilos, aranhas). - The page sayswaiting for prey to pass instead of hunting it down
- The source says
T . serrulatus presents a typical "sit-and-wait" foraging strategy and does not actively search for food
- The page saysthis one species causes over 90,000 cases of envenomation a year
- The source says
is the most medically relevant species in Brazil where it is spreading rapidly and causing over 90,000 cases of envenomation yearly
- The page saysfrom Minas Gerais to all other regions of the country
- The source says
there are currently records of T . serrulatus in all other Brazilian regions
Note: stats.habitat; Minas Gerais is rosa-2015's "the state to which the species was once believed to be restricted". - The page saysCockroaches, crickets, and spiders
- The source says
elimination of invertebrates on which they feed (cockroaches, crickets, spiders, etc.)
Note: stats.diet. - The page saysunfertilized eggs develop straight into daughters
- The source says
Tityus serrulatus is viviparous and can reproduce by parthenogenesis, producing progeny from non-fecundated eggs
Note: vibe.reason; 'daughters' rests on lourenco-2015's absence of males from all known populations, as in the body claim. - The page saysin any month
- The source says
this species is capable of producing offspring throughout the year
Note: vibe.reason
Source
02
Lourenço 2015
Lourenço (2015). What do we know about some of the most conspicuous scorpion species of the genus Tityus? A historical approach. Journal of Venomous Animals and Toxins including Tropical Diseases.
- The page saysa row of saw-like teeth on its tail that gave the species its scientific name
- The source says
These form a serrula (Fig 7) which is the origin of the Latin name of the species, T. serrulatus.
Note: The serrula sits on the dorsal keels of metasomal segments III and IV, that is, the tail. - The page saysBrazilian yellow scorpions are usually female
- The source says
Tityus serrulatus was usually considered an obligate parthenogenetic species, but some isolated bisexual populations have finally been detected [60, 61]. However, bisexual populations appear to be extremely marginal within the present geographic distribution of the species
Note: Population-level support: male-producing populations are the extremely marginal exception. Also in the body and FAQ 1. - The page saysScientists have found a few scattered populations that still seem to have males, though these appear to be rare exceptions
- The source says
Tityus serrulatus was usually considered an obligate parthenogenetic species, but some isolated bisexual populations have finally been detected [60, 61]. However, bisexual populations appear to be extremely marginal within the present geographic distribution of the species
- The page saysA few scattered populations with males have been found, but they appear to be rare exceptions within the species' range.
- The source says
some isolated bisexual populations have finally been detected [60, 61]. However, bisexual populations appear to be extremely marginal within the present geographic distribution of the species
Note: FAQ 1's designated ref; restates the body's claim. - The page saysThe species usually colonizes towns and cities, and it is easily carried from old ones to new ones by human transport.
- The source says
T. serrulatus usually colonizes urban areas (cities and towns), and can easily be transported by human agency from old to new cities
- The page saysBrasília was invaded and colonized in less than 15 to 20 years.
- The source says
Brasilia, for instance, has been invaded and was colonized by T. serrulatus in less than 15-20 years
- The page saysplus Argentina and Bolivia
- The source says
It was also recorded in Argentina and Bolivia.
- The page saysplus parts of Argentina and Bolivia
- The source says
It was also recorded in Argentina and Bolivia.
Note: stats.habitat closing clause. - The page saysadults are usually female
- The source says
Tityus serrulatus was usually considered an obligate parthenogenetic species, but some isolated bisexual populations have finally been detected [60, 61]. However, bisexual populations appear to be extremely marginal within the present geographic distribution of the species
Note: vibe.reason
Source
03
Mario da Rosa et al. 2015
Mario da Rosa et al. (2015). New record and occurrence map of Tityus serrulatus Lutz & Mello, 1922 (Scorpiones, Buthidae) in the state of Rio Grande do Sul, southern Brazil. Check List.
- The page saysgrows about 5 to 7 centimeters long (2 to 2.75 inches)
- The source says
It measures about 50–70 mm long when adult
Note: 5–7 cm / 2–2.75 in, converted from the quote's 50–70 mm. - The page sayspale yellow legs and pedipalps, a darker trunk
- The source says
has pale yellow colored legs and pedipalps, but with a darker shade of yellow, tending to brown on the trunk, fingers and tip of the tail
- The page sayswas once believed to be restricted to Minas Gerais, in southeastern Brazil
- The source says
Its holotype is a female from Belo Horizonte, Minas Gerais (Souza et al. 2009), the state to which the species was once believed to be restricted
Note: The source's own hedge kept. pimenta-2019 says only "Originally, T. serrulatus was restricted to a single state in the South-eastern region of Brazil" without naming the state, so the state name comes from rosa-2015 with its "once believed". - The page saysOne specimen stung a supermarket worker handling a load of fruit sent from the southeast, and two more turned up at a trucking company.
- The source says
The specimen was discovered at a supermarket in Porto Alegre ... after stinging the hand of an employee who was handling fruit. At the time of this accident he was handling a load of fruit coming from the southeast region of Brazil ... Two individuals were found on the premises of a trucking company.
Note: Three records from Rio Grande do Sul, in the far south.
Source
04
Cologna et al. 2009
Cologna et al. (2009). Tityus serrulatus Scorpion Venom and Toxins: An Overview. Protein & Peptide Letters.
- The page saysconsidered the most dangerous scorpion in South America
- The source says
Tityus serrulatus is considered the most dangerous scorpion in South America and responsible for most of the fatal cases.
- The page saysdangerLevel: Deadly
- The source says
Tityus serrulatus is considered the most dangerous scorpion in South America and responsible for most of the fatal cases.
Source
05
Horta et al. 2014
Horta et al. (2014). Molecular, Immunological, and Biological Characterization of Tityus serrulatus Venom Hyaluronidase: New Insights into Its Role in Envenomation. PLoS Neglected Tropical Diseases.
- The page saysIn Brazil, scorpion stings are recorded more often than bites from any other venomous animal, including snakes
- The source says
In Brazil, scorpion accidents have the highest incidence when compared to those caused by other venomous animals, including snakes
- The page saysThe venom's neurotoxins act on sodium channels in nerve cells and disrupt the nerves and muscles, the heart, and breathing.
- The source says
The main toxic components of Ts venom are the well-described α and β-type toxins, which act on different sites of voltage-sensitive sodium channels ... These neurotoxins disrupt the neuromuscular, cardiovascular, and respiratory systems
Note: "Nerves and muscles, the heart, and breathing" renders the quote's neuromuscular, cardiovascular and respiratory systems. - The page saysIts venom carries neurotoxins that act on sodium channels in nerve cells and disrupt the nerves and muscles, the heart, and breathing, a mix of symptoms that can lead to death.
- The source says
These neurotoxins disrupt the neuromuscular, cardiovascular, and respiratory systems and elicit a complex pattern of clinical signs and symptoms that can lead to death.
Note: FAQ 3's wording of the body sentence above. - The page saysAbout 1.77 percent of scorpion stings in children up to 14 years old end in death, even though most stings happen to adults.
- The source says
The mortality rate from scorpion stings is approximately 1.77% among children up to 14 years old, but most accidents occur in adults.
Note: Scorpion stings in Brazil, not this species' alone; the sentence says "scorpion stings". Also FAQ 2. - The page saysTityus serrulatus is the species primarily responsible for severe scorpion stings in Brazil.
- The source says
The yellow scorpion Tityus serrulatus (Ts) is the species primarily responsible for severe accidents because it is easily adapted to the urban environment
- The page saysModerate and severe cases are treated with painkillers and antivenom.
- The source says
Treatment of moderate and severe scorpion stings consists of analgesics for pain and horse antiscorpionic or anti-arachnidic antivenom
- The page saysdangerLevel: Deadly
- The source says
The mortality rate from scorpion stings is approximately 1.77% among children up to 14 years old, but most accidents occur in adults
Source
06
Reckziegel & Pinto 2014
Reckziegel & Pinto (2014). Scorpionism in Brazil in the years 2000 to 2012. Journal of Venomous Animals and Toxins including Tropical Diseases.
- The page saysacross Brazil the majority of scorpion sting cases are clinically mild, though most of the fatal ones are linked to *Tityus serrulatus*
- The source says
The majority of cases were clinically mild, with a mortality rate of around 0.9%, while most fatal accidents were associated with the specie Tityus serrulatus
Note: National scope, Brazil 2000 to 2012. Replaces a Campina Grande cohort whose own paper names Tityus stigmurus as the northeast's main offending species. - The page saysdangerLevel: Deadly
- The source says
The majority of cases were clinically mild, with a mortality rate of around 0.9%, while most fatal accidents were associated with the specie Tityus serrulatus
Note: Deadly is 'capable of killing a human'; Extreme is 'without necessarily being lethal'. The tiers are capabilities, and the sources record deaths. Was Extreme.
Source
07
Instituto Butantan
Escorpião: Controle de escorpiões de importância em saúde. Instituto Butantan.
- The page saysIn the storm drains and rubble piles of Brazilian cities
- The source says
terrenos baldios com mato, entulho ou lixo ... galerias de águas pluviais e esgoto, canais, bocas de lobo
Note: Portuguese: "vacant lots with scrub, rubble or trash ... storm-water and sewer galleries, canals, storm drains." The booklet's natural-history section, covering the Brazilian scorpions of health importance, of which T. serrulatus is the first listed. - The page saysdoes not need a mate to breed
- The source says
Sua reprodução é partenogenética, na qual as fêmeas se reproduzem sem a necessidade da presença de um macho.
Note: Portuguese: "Its reproduction is parthenogenetic, in which females reproduce without needing the presence of a male." From the booklet's Tityus serrulatus entry. - The page saysA mother gives birth to roughly 20 to 25 live young about twice a year
- The source says
Cada mãe tem aproximadamente dois partos por ano, com cerca de 20 a 25 filhotes cada.
Note: Portuguese: "Each mother has approximately two litters a year, with about 20 to 25 young each." - The page sayssheltering in drains, rubble, and scrubland
- The source says
terrenos baldios com mato, entulho ou lixo ... galerias de águas pluviais e esgoto, canais, bocas de lobo
Note: Portuguese: "vacant lots with scrub, rubble or trash ... storm-water and sewer galleries, canals, storm drains." - The page saysLocal health teams search for the scorpions at night with ultraviolet flashlights, which make the animals easier to see
- The source says
As atividades de controle sob responsabilidade das equipes de saúde locais envolvem ... no caso de coleta em período noturno, lanternas de luz ultravioleta que facilitam a visualização dos animais
Note: Portuguese: "Control activities, the responsibility of local health teams, involve ... in the case of nighttime collection, ultraviolet flashlights that make the animals easier to see." - The page sayscollect and remove them from inside and around buildings
- The source says
a coleta e remoção dos escorpiões do ambiente, seja em áreas internas de edificações ou externas
Note: Portuguese: "the collection and removal of scorpions from the environment, whether inside buildings or outdoors." - The page saysThe asexual arachnid that invaded Brazilian cities without needing a single male to reproduce.
- The source says
Sua reprodução é partenogenética, na qual as fêmeas se reproduzem sem a necessidade da presença de um macho.
Note: Portuguese: "reproduction is parthenogenetic, in which females reproduce without needing the presence of a male." The invasion half is the range claim above (pimenta-2019, records in all other Brazilian regions). - The page saysSewers, rubble piles, and scrubland
- The source says
terrenos baldios com mato, entulho ou lixo ... galerias de águas pluviais e esgoto, canais, bocas de lobo
Note: stats.habitat opening clause; same booklet list as the body. - The page saysadult scorpions are usually female, and unfertilized eggs develop straight into daughters, and a female breeds with no male present
- The source says
Sua reprodução é partenogenética, na qual as fêmeas se reproduzem sem a necessidade da presença de um macho.
Note: stats.superpower; the all-female population is lourenco-2015's "absence of males from all known populations". - The page saysa mother births roughly 20 to 25 young about twice a year
- The source says
Cada mãe tem aproximadamente dois partos por ano, com cerca de 20 a 25 filhotes cada.
Note: vibe.reason. Portuguese: "Each mother has approximately two litters a year, with about 20 to 25 young each."
How the table was made: a writer drafted the profile from these sources and logged each claim with its quote, a reviewer with nothing but this table checked every sentence said no more than its quote, and a script confirmed each quote appears word for word in the source. The method is in the site'sAbout page.