Hadramphus commonly known as knobbled weevils, is a genus of flightless molytine

Molytinae

Molytinae is a subfamily of weevil described by Carl Johan Schönherr in 1823.Molytinae includes the following tribes:* Amalactini* Aminyopini* Amorphocerin* Anchonini* Cholini* Cleogonini* Conotrachelini* Cycloterini* Dinomorphini* Euderini...

 weevils from the family Curculionidae

Curculionidae

Curculionidae is the family of the "true" weevils . It was formerly recognized in 1998 as the largest of any animal family, with over 40,000 species described worldwide at that time...

. It is endemic to New Zealand and consists of four species.

The type species Hadramphus spinipennis was designated by Thomas Broun in 1911. Hadramphus pittospori was described by Guillermo Kuschel within the new genus Karocolens in 1987 but placed by Robin Craw into the genus Hadramphus in 1999. Hadramphus tuberculatus

Karocolens tuberculatus

Hadramphus tuberculatus is a rare weevil endemic to the Christchurch area in the South Island of New Zealand. It was thought to be extinct from 1922 to 2004...

was described by Francis Polkinghorne Pascoe

Francis Polkinghorne Pascoe

Francis Polkinghorne Pascoe was a Cornish entomologist mainly interested in Coleoptera.-Biography:He was born in Penzance Cornwall and trained at St. Bartholomew's Hospital. Appointed surgeon in the Navy he served on Australian, West Indian and Mediterranean stations...

 as Lyperobius tuberculatus in 1877 but transferred by Kuschel into the genus Hadramphus in 1971. The fourth species Hadramphus stilbocarpae was described by Kuschel in 1971.

All four species are relatively large with a length ranging from 11.7 to 23 mm. They are predominantly dark brown and characterized by triangular or rounded tubercles on their flanks and on their upperparts. H. pittospori is confined to Poor Knights Islands

Poor Knights Islands

The Poor Knights Islands are a group of islands off the east coast of the Northland Region of the North Island of New Zealand. They are located to the northeast of Whangarei, and lie offshore half way between Bream Head and Cape Brett. Uninhabited since the 1820s, they are a nature reserve and...

, H. spinipennis is endemic to the Chatham Islands

Chatham Islands

The Chatham Islands are an archipelago and New Zealand territory in the Pacific Ocean consisting of about ten islands within a radius, the largest of which are Chatham Island and Pitt Island. Their name in the indigenous language, Moriori, means Misty Sun...

, H. stilbocarpae lives on Breaksea Island, Fiordland

Fiordland

Fiordland is a geographic region of New Zealand that is situated on the south-western corner of the South Island, comprising the western-most third of Southland. Most of Fiordland is dominated by the steep sides of the snow-capped Southern Alps, deep lakes and its ocean-flooded, steep western valleys...

, Resolution Island

Resolution Island, New Zealand

Resolution Island is the largest island in Fiordland region of southwest New Zealand, covering a total of . It is the country's seventh largest island...

 and Puysegur Point

Puysegur Point

Puysegur Point is located in the far southwest of the South Island of New Zealand. It lies within Fiordland National Park on the southern head of Preservation Inlet. It lies 145 kilometres west-northwest of Invercargill. It is the site of a lighthouse station now automated but for many years the...

, islands around Stewart Island/Rakiura

Stewart Island/Rakiura

Stewart Island/Rakiura is the third-largest island of New Zealand. It lies south of the South Island, across Foveaux Strait. Its permanent population is slightly over 400 people, most of whom live in the settlement of Oban.- History and naming :...

 (Bird Island and Big South Cape Island) and the sub-Antarctic Snares Islands. The rarest of them is Hadramphus tuberculatus. It is endemic to the Burkes Pass Scenic Reserve in the Canterbury Plains

Canterbury Plains

The Canterbury Plains are an area in New Zealand centred to the south of the city of Christchurch in the Canterbury Region. Their northern extremes are at the foot of the Hundalee Hills in the Hurunui District, and in the south they merge into the plains of North Otago beyond the Waitaki...

and was not seen between 1922 and 2004.