Tityus serrulatus (Brazilian yellow scorpion)

Description

#Parthenogenesis  
#Lethal

Size: 5~7cm
LD50: 0.026 (Minas Gerais) / 0.052 mg/kg (Distrito Federal)

Tityus serrulatus, the Brazilian yellow scorpion, is a species of scorpion of the family Buthidae. It is native to Brazil, and widely found throughout the country, including the states of Alagoas, Bahia, Ceará, Espírito Santo, Goiás, Mato Grosso, Mato Grosso do Sul, Minas Gerais, Paraná, Pernambuco, Rio de Janeiro, Rio Grande do Norte, Rio Grande do Sul, Rondônia, Santa Catarina, São Paulo, Sergipe, and Distrito Federal.

Adult specimens typically measure between 5–7 cm (2–3 in) in length. As suggested by its common name, coloration consists of pale-yellow legs (8 in total) and pedipalps, with a darker shade of yellowish brown on the trunk, fingers, and tip of the tail.

its venom is extremely toxic
It is the most dangerous scorpion in South America and is responsible for the most fatal cases.


In Brazil, scorpions are credited with causing the highest incidence of human envenomations of all venomous animals. They cause more than all other venomous animals, including snakes and spiders, combined. With mortality rates ranging from 1.0 to 2.0% among children and elderly persons,

Effects
In mild cases, localized pain is the primary symptom. Tityus serrulatus has an excitatory neurotoxin that attacks the autonomic nervous system, causing the release of adrenaline, noradrenaline and acetylcholine, causing an immense variety of symptoms in the victims; clinical effects may include hyperglycemia, fever, priapism, agitation, hypersalivation, tachycardia, hypertension, mydriasis, sweating, hyperthermia, tremors, gastrointestinal complications (diarrhea, abdominal pain, nausea, vomits) and pancreatitis. Convulsions and coma are relatively rare, but can occur. Death usually results from pulmonary edema and cardiorespiratory failure. Deaths can occur between 1-6 hours, or 12-14 hours, depending on the age group, the person's state of health and the quantity of injected venom.

Credit: Wiki, Anna M, iNaturalist, arachnid.addited

ABOUT SIZES

Scorpions usually sell by instar, a developmental stage between each moult.

However for pricing convenience, this is a personal GENERAL guideline.

1. Scorpling: i2 to i3
2. Juvenile: i3 to i4
3. Sub-adult: i4 to i5
4. Adult: i5 and above