Thorax porcellana

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Thorax porcellana
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Blattodea
Family: Blaberidae
Henri Louis Frédéric de Saussure, 1862

Thorax porcellana Saussure is a species of epilamprid cockroach occurring in Sri Lanka and India. Both sexes are fully winged, but only the male takes flight, and then rarely and on short flights. [1]

Henri Louis Frédéric de Saussure Swiss zoologist

Henri Louis Frédéric de Saussure was a Swiss mineralogist and entomologist specialising in studies of Hymenoptera and Orthoptera. He also was a prolific taxonomist.

Sri Lanka Island country in South Asia

Sri Lanka, officially the Democratic Socialist Republic of Sri Lanka, is an island country in South Asia, located in the Indian Ocean to the southwest of the Bay of Bengal and to the southeast of the Arabian Sea. The island is historically and culturally intertwined with the Indian subcontinent, but is geographically separated from the Indian subcontinent by the Gulf of Mannar and the Palk Strait. The legislative capital, Sri Jayawardenepura Kotte, is a suburb of the commercial capital and largest city, Colombo.

India Country in South Asia

India, also known as the Republic of India, is a country in South Asia. It is the seventh largest country by area and with more than 1.3 billion people, it is the second most populous country and the most populous democracy in the world. Bounded by the Indian Ocean on the south, the Arabian Sea on the southwest, and the Bay of Bengal on the southeast, it shares land borders with Pakistan to the west; China, Nepal, and Bhutan to the northeast; and Bangladesh and Myanmar to the east. In the Indian Ocean, India is in the vicinity of Sri Lanka and the Maldives, while its Andaman and Nicobar Islands share a maritime border with Thailand and Indonesia.


Louis M. Roth speculated in 1981 that the arched tegmina found in Phoraspis and Thorax were similar to that of Phlebonotus pallens and would suggest similar maternal care. The Indian entomologist S. Bhoopathy confirmed in 1998 that this ovoviviparous species carries some 30-40 hatchling nymphs for their first two instars in a special recess under the domed forewings on the dorsum of the mother. During their stay of about 7 weeks they drink a pinkish liquid secreted from between the tergites of their mother’s abdomen. They also use their relatively long, sharp, mandibular tooth-like processes to pierce the mother’s cuticle and feed directly on her haemolymph. These 'teeth' are lost after two instars when there is no longer a close association with the mother. [2] [3] [4]

"Immediately after hatching, the first instar nymphs crawled over the abdomen of the mother. The upper surface of her abdomen became markedly depressed into a fairly tight spacious trough or chamber with its sides raised. As the nymphs crawled over her body, she raised up her tegmina, which were large, tough, and dome-shaped, and all the nymphs were accommodated compactly; the tegmina were placed in position so as to conceal all the nymphs and to afford perfect protection."
Bhoopathy 1998


Parental care among cockroaches, where offspring are fed on bodily secretions, is not rare, and has been recorded in Perisphaerus , Trichoblatta , Pseudophoraspis , Phlebonotus , Gromphadorhina , Solganea , Cryptocercus and Blattella , whereas biparental care is found only in wood-eating cockroaches - wood is low in nutrients and is made assimilable by micro-organisms in the adult gut.

Pseudophoraspis is a genus of cockroaches.

Gromphadorhina is one of several roach genera in the tribe Gromphadorhinini, all from the island of Madagascar. It is one of several genera known collectively known as hissing cockroaches, and common in the pet trade. In the older literature, the name is sometimes misspelled as Gromphadorrhina.

<i>Cryptocercus</i> genus of insects

Cryptocercus is a genus of Dictyoptera and the sole member of its own family Cryptocercidae. Species are known as wood roaches or brown-hooded cockroaches. These roaches are subsocial, their young requiring considerable parental interaction. They also share wood-digesting gut bacteria types with wood-eating termites, and are therefore seen as evidence of a close genetic relationship, that termites are essentially evolved from social cockroaches.



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  1. "Cockroaches - Ecology, Behaviour, and Natural History" - Bell, Roth & Nalepa (Johns Hopkins University Press, 2007)
  2. "genus Thorax Saussure, 1862: Blattodea Species File". Retrieved 2014-04-30.
  3. "Breeding ecology of the rainforest dung beetle Cephalodesmius armiger (Scarabaeidae) in Tooloom National Park - ResearchGate". Retrieved 2014-04-30.
  4. "Zachowania społeczne karaczanów -". Retrieved 2014-04-30.