Female penises evolved twice in bark lice

(Hokkaido University) In a group of bark lice, a penis has evolved twice -- in the females. In their nutrient-scarce environment, 'seminal gifts' are an incentive for females to force mating, leading to the co-evolution of female penises and male vaginas.
Source: EurekAlert! - Biology - Category: Biology Source Type: news

Related Links:

Gianluca Nazzaro, Giovanni Genovese, Stefano VeraldiIndian Journal of Dermatology, Venereology, and Leprology 2019 85(6):679-680
Source: Indian Journal of Dermatology, Venereology and Leprology - Category: Dermatology Authors: Source Type: research
Updated Date: Wed, 09 Oct 2019 00:00:00 EDT
Source: DailyMed Drug Label Updates - Category: Drugs & Pharmacology Source Type: alerts
Updated Date: Wed, 02 Oct 2019 00:00:00 EDT
Source: DailyMed Drug Label Updates - Category: Drugs & Pharmacology Source Type: alerts
Updated Date: Wed, 02 Oct 2019 00:00:00 EDT
Source: DailyMed Drug Label Updates - Category: Drugs & Pharmacology Source Type: alerts
Updated Date: Wed, 02 Oct 2019 00:00:00 EDT
Source: DailyMed Drug Label Updates - Category: Drugs & Pharmacology Source Type: alerts
HEAD lice can be uncomfortable and leave people feeling self-conscious. While head lice cannot be prevented, knowing the warning signs is important to address it.
Source: Daily Express - Health - Category: Consumer Health News Source Type: news
Updated Date: Thu, 26 Sep 2019 00:00:00 EDT
Source: DailyMed Drug Label Updates - Category: Drugs & Pharmacology Source Type: alerts
Answer toParasite Case of the Week 560: " Back to school " pinwormThis fun image had a question in 3 parts:What is the parasite shown? Eggs ofEnterobius vermicularisWhy is this a suitable parasite for September? September is the time that kids go back to school in America, and thus are more likely to obtain easily-transmitted parasites such as pinworm and head lice. As Nema noted, pinworm is " a parasite that is transmitted efficiently at the start of the school year because the embryonated eggs easily pass from the hands (unwashed) from one child to another and can also pass through the fomites "What i...
Source: Creepy Dreadful Wonderful Parasites - Category: Parasitology Source Type: blogs
Abstract Methods to prevent parasite infestations in farmed fish are becoming widespread, yet tests of their effectiveness often lack commercial relevance and statistical power, which may lead to technology misuse. Here, we examined salmon louse infestation on Atlantic salmon in triplicate commercial snorkel louse barrier and standard cages over a 12 month production cycle. Barrier cages reduced newly settling lice on Atlantic salmon by 75%, with variability in parasite reduction over time depending upon environmental variables. The commercial, triplicate, long-term study design serves as a template to validate pe...
Source: International Journal for Parasitology - Category: Parasitology Authors: Tags: Int J Parasitol Source Type: research
Head lice infestation (Pediculosis) is one of the most important health challenges particularly in primary school-aged children. It is often present among 6 –11-year-old students in various tropical and tempera...
Source: BMC Dermatology - Category: Dermatology Authors: Tags: Research article Source Type: research
More News: Biology | Environmental Health | Lice | Nutrition